Fronius Fronius Primo GEN24 3 - 6 kW Plus Operating Instruction [EN]

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Operating Instructions

Fronius Primo GEN24

3.0 / 3.0 Plus / 3.6 / 3.6 Plus

4.0 / 4.0 Plus / 4.6 / 4.6 Plus

5.0 / 5.0 Plus / 6.0 / 6.0 Plus

Operating Instructions

42,0426,0302,EN 016-24042023

Contents

Safety rules 8

Explanation of safety notices 8 Safety 8 General 8 Environmental conditions 9 Qualified personnel 9 Noise emission values 9 EMC measures 10 Backup power 10 Data protection 11 Copyright 11 Protective earthing (PE) 11

General information 13

Fronius Primo GEN24 15

Device concept 15 Function overview 15 Fronius UP 16 Scope of supply 16 Intended use 16 Thermal concept 17 Fronius Solar.web 17 Local communication 18

The various operating modes 19

Operating modes – Explanation of symbols 19 Operating mode – Inverter with battery 20 Operating mode – Inverter with battery and several Smart Meters 20 Operating mode - inverter with battery, AC-coupled to another inverter 20 Operating mode – Inverter with battery and backup power function 21 Operating mode – Inverter with battery, Ohmpilot and backup power function 21 Operating mode – Inverter with battery, further inverter and backup power function 21 Energy ﬂow direction of the inverter 22 Operating states (only for systems with a battery) 22

Energy saving mode 24

General 24 Switch-off conditions 24 Switch-on conditions 24 Special case 24 Indication of energy saving mode 25

Suitable batteries 26

General 26 Limitations in operation 26 BYD Battery-Box Premium 26 LG RESU FLEX 27

Manual system start 29

Requirements 29 Notification of system shutdown 29 Manual battery start after system shutdown 29 Starting backup power operation after a system shutdown 29

Protection of people and equipment 30

Central grid and system protection 30 WSD (wired shutdown) 30 RCMU 30 Safe state 30 Surge protective device 30

Control elements and connections 31

Connection area 31 Connection area divider 32

Ground electrode terminal 32 DC disconnector 33 Data communication area 33 Button functions and LED status indicator 35 Internal schematic connection diagram of the IOs 36

Backup power variant - PV Point (OP) 39

General 41

PV Point (OP) 41 Explanation - PV Point (OP) 41

Backup power variant - Full Backup 43

General 45

Prerequisites for backup power mode 45 Transitioning from feeding energy into the grid to backup power mode 45 Transitioning from backup power mode to feeding energy into the grid 45

Backup power and energy saving mode 46 Cabling variants including backup power circuits with 1-pin separation e.g. Austria or Australia

Functions 47

Transitioning from feeding energy into the grid to backup power mode 47

Transitioning from backup power mode to feeding energy into the grid 47 All-pin separation cabling variant e.g. Germany, France, Spain, UK 48

Functions 48

Transitioning from feeding energy into the grid to backup power mode 48

Transitioning from backup power mode to feeding energy into the grid 49 All-pin separation cabling variant, Italy 50

Functions 50

Transitioning from feeding energy into the grid to backup power mode 50

Transitioning from backup power mode to feeding energy into the grid 51

Installation 53

General 55

Quick-lock system 55

Warning notices on the device 55

System component compatibility 57 Installation location and position 58

Choosing the location of the inverter 58

Choosing the location of third-party batteries 59

Installation position of inverter 60 Install the mounting bracket and hang up the inverter 62

Selecting the fixing material 62

Properties of the mounting bracket 62

Do not deform the mounting bracket 62

Fitting the mounting bracket to a wall 62

Installing the mounting bracket on a mast or beam 63

Attaching the mounting bracket to mounting rails 64

Attaching the inverter to the mounting bracket 64 Prerequisites for connecting the inverter 65

Permissible cables for the electrical connection 65

Permitted cables for the data communication connection 66

Cross section of the AC cable 66

Cross section of the DC cable 67

Maximum alternating current fuse protection 67 Connecting the inverter to the public grid (AC side) 69

Safety 69

Connecting the inverter to the public grid (AC side) 69 Connecting solar module strings to the inverter 72

General comments regarding PV modules 72

Safety 72

Module array - general information 73

Module array configuration 3 ‑ 6 kW 73

Connecting the solar module strings to the inverter 74 Connecting the battery to the inverter 78

Safety 78

Connecting the battery on the DC side 78

Connecting the LG RESU FLEX ground conductor 82 Connecting backup power - PV Point (OP) 83

Safety 83

Installation 83 Connecting backup power - Full Backup 88

Safety 88

Cabling variants including backup power circuits with 1-pin separation e.g. Austria or Aus-

tralia

All-pin separation cabling variant e.g. Germany, France, Spain 89

All-pin separation cabling variant, e.g. UK 90

All-pin separation cabling variant, e.g. Italy 91

Testing backup power mode 92 Connecting the data communication cable 93

Modbus participants 93

Routing data communication cables 94

Connecting the battery communication cable 96

Terminating resistors 96

Installing the WSD (wired shutdown) 98 Closing and commissioning the inverter 99

Closing the inverter's connection area/housing cover, and commissioning 99

Starting the inverter for the first time 99

Installation with the app 100

Installation using the web browser 100 Switching off current supply and restarting the inverter 102

De-energising the inverter and switching it on again 102

Settings - user interface of the inverter 103

User settings 105

User login 105

Selecting the language 105 Device configuration 106

Components 106

Functions andI/Os 107

Demand Response Modes (DRM) 108

Inverter 108 Energy management 111

Energy management 111

Examples - Time-dependent battery control 112

Allowed battery control rules 114

PV power reduction 116

Load management 116 System 118

General 118

Update 118

Setup wizard 118

Restoring the factory settings 118

Event log 118

Information 118

Licence manager 119

Support 120 Communication 121

Network 121

Modbus 122

Remote control 123

Fronius Solar API 123 Safety and grid requirements 125

Country setup 125

Feed-in limitation 125

Dynamic power regulation with several inverters 127

I/O power management 129

Connection diagram - 4 relay 130

I/O power management settings - 4 relays 131

Connection diagram - 3 relay 132

I/O power management settings - 3 relays 133

Connection diagram - 2 relay 134

I/O power management settings - 2 relays 135

Connection diagram - 1 relay 136

I/O power management settings - 1 relay 137

Autotest(CEI 0-21) 137

Options 139

Surge protective device (SPD) 141

General 141

Safety 141

Scope of supply 141

De-energising the inverter 142

Installation 143

Commissioning the inverter 148 DC Connector Kit GEN24 150

General 150

General comments regarding PV modules 150

Safety 150

Scope of supply 151

De-energising the inverter 151

Installation 152

Commissioning the inverter 156

Appendix 157

Care, maintenance and disposal 159

General 159

Cleaning 159

Maintenance 159

Safety 159

Operation in dusty environments 159

Disposal 160 Guarantee provisions 162

Fronius manufacturer's warranty 162 Components for automatic Full Backup backup power changeover 163

Components for automatic Full Backup backup power changeover 163 Status codes and remedy 165

Display 165

Status Codes 165 Technical data 166

Fronius Primo GEN24 3.0 / 3.0 Plus 166

Fronius Primo GEN24 3.6 / 3.6 Plus 169

Fronius Primo GEN24 4.0 / 4.0 Plus 172

Fronius Primo GEN24 4.6 / 4.6 Plus 176

Fronius Primo GEN24 5.0 / 5.0 Plus 179

Fronius Primo GEN24 6.0 / 6.0 Plus 183

WLAN 186

Technical data of surge protective device DC SPD type 1+2 GEN24 186

Explanation of footnotes 187

Integrated DC disconnector 187

Circuit diagrams 189

Circuit Diagram - PV Point (OP) 191

Circuit Diagram 191 Circuit Diagram - PV Point (OP) Australia 192

Circuit Diagram 192 Fronius Primo GEN24 and BYD Battery-Box Premium HV 193

Circuit Diagram 193 Fronius Primo GEN24 with two BYD Battery-Box Premium HV connected in parallel 194

Circuit Diagram 194 Fronius Primo GEN24 with three BYD Battery-Box Premium HV connected in parallel 195

Circuit Diagram 195 Fronius Primo GEN24 and LG RESU FLEX 196

Circuit Diagram 196 Automatic switch to backup power 1-pin double separation - e.g. Austria 197

Circuit Diagram 197 Automatic switch to backup power 1-pin single separation - e.g. Australia 198

Circuit Diagram 198 Automatic switch to backup power 2-pin double separation - e.g. Germany 199

Circuit Diagram 199 Automatic switch to backup power 2-pin single separation - e.g. France, Spain 200

Circuit Diagram 200 Automatic switch to backup power 2-pin double separation - e.g. UK 201

Circuit Diagram 201 Automatic switch to backup power 2-pin double separation with ext. grid and system protection - e.g. Italy

Circuit Diagram 202 Fronius Primo GEN24 with Enwitec Box 203

Circuit Diagram 203 Wiring diagram - surge protective device SPD 204

Circuit Diagram 204

202

Dimensions of the inverter 205

Fronius Primo GEN24 3 - 6 kW 207

Safety rules

Explanation of safety notices

Safety

WARNING!

Indicates a potentially hazardous situation.

Death or serious injury may result if appropriate precautions are not taken.

▶

CAUTION!

Indicates a situation where damage could occur.

If not avoided, minor injury and/or damage to property may result.

▶

NOTE!

Indicates a risk of ﬂawed results and possible damage to the equipment.

If you see any of the symbols depicted in the "Safety rules" chapter, special care is required.

CAUTION!

Danger from crushing due to the incorrect handling of attachments and connection parts.

Injuries to limbs may result.

When lifting up, putting down and attaching the inverter, use the integrated

▶

grips. When fitting attachments, ensure that no limbs are located between the at-

▶

tachment and the inverter. Do not hold onto the individual poles on the terminals when locking and un-

▶

locking.

General The device has been manufactured in line with the state of the art and according

to recognised safety standards. In the event of incorrect operation or misuse, there is a risk of

Injury or death to the operator or a third party

Damage to the device and other material assets belonging to the operating

company

All personnel involved in commissioning, maintenance, and servicing of the device must:

Be suitably qualified

Have knowledge of and experience in dealing with electrical installations

Have fully read and precisely followed these Operating Instructions

In addition to the Operating Instructions, all applicable local rules and regulations regarding accident prevention and environmental protection must also be followed.

All safety and danger notices on the device:

Must be kept in a legible state

Must not be damaged

Must not be removed

Must not be covered, pasted, or painted over

Only operate the device when all protection devices are fully functional. If the protection devices are not fully functional, there is a danger of

Injury or death to the operator or a third party

Damage to the device and other material assets belonging to the operating

company

Any safety devices that are not fully functional must be repaired by an authorized specialist before the device is switched on.

Never bypass or disable protection devices.

For the location of the safety and danger notices on the device, refer to the chapter headed "Warning notices on the device" in the Operating Instructions for your device.

Faults that could compromise safety must be remedied before switching on the device.

Environmental conditions

Qualified personnel

Operation or storage of the device outside the stipulated area will be deemed as not in accordance with the intended purpose. The manufacturer accepts no liability for any damage resulting from improper use.

The servicing information contained in these operating instructions is intended only for the use of qualified service engineers. An electric shock can be fatal. Do not carry out any actions other than those described in the documentation. This also applies to qualified personnel.

All cables and leads must be secured, undamaged, insulated and adequately dimensioned. Loose connections, scorched, damaged or inadequately dimensioned cables and leads must be immediately repaired by authorised personnel.

Maintenance and repair work must only be carried out by an authorised specialist.

It is impossible to guarantee that bought-in parts are designed and manufactured to meet the demands made on them, or that they satisfy safety requirements. Use only original spare parts (also applies to standard parts).

Do not carry out any alterations, installations, or modifications to the device without first obtaining the manufacturer's permission.

Components that are not in perfect condition must be changed immediately.

Noise emission values

The sound power level of the inverter is specified in the Technical data.

The device is cooled as quietly as possible with the aid of an electronic temperature control system; this depends on the amount of converted power, the ambient temperature, the level of soiling of the device, etc.

It is not possible to provide a workplace-related emission value for this device because the actual sound pressure level is heavily inﬂuenced by the installation

situation, the grid quality, the surrounding walls and the properties of the room in general.

EMC measures In certain cases, even though a device complies with the standard limit values for

emissions, it may affect the application area for which it was designed (e.g., when there is equipment that is susceptible to interference at the same location, or if the site where the device is installed is close to either radio or television receivers). If this is the case, then the operator is obliged to take action to rectify the situation.

Backup power This system has backup power functions. This enables a replacement power sup-

ply to be established in the event of a failure in the public grid.

Where an automatic backup power supply is installed, a backup power warning

notice (https://www.fronius.com/en/search-page, item number: 42,0409,0275)

must be fitted on the electrical distributor.

Maintenance and installation work in the home network requires both disconnection on the utility side and deactivation of the replacement power mode by opening the integrated DC disconnector on the inverter.

Depending on the insolation conditions and the battery state of charge, the backup power supply is automatically deactivated and activated. This can cause the backup power supply to unexpectedly return from standby mode. Therefore, installation work can only be performed on the home network when the backup power supply is deactivated.

Inﬂuencing factors on the total power in backup power mode:

Reactive power

Electrical loads with a power factor not equal to 1 also require reactive power in addition to effective power. The reactive power also loads the inverter. Therefore, to correctly calculate the actual total power, it is not the rated power of the load that is relevant, but the current caused by effective and reactive power.

Devices with a high reactive power are mainly electric motors such as:

Water pumps

Circular saws

Blowers and fans

High starting current

Electrical loads that need to accelerate a large mass usually require a high starting current. This can be up to 10 times higher than the nominal current. The maximum current of the inverter is available for the starting current. Loads with too high starting currents therefore cannot be started/operated, even though the nominal power of the inverter suggests that they can. When dimensioning the backup power circuit, the connected load power and any starting current must also be taken into account.

Devices with high starting currents are, for example:

Devices with electric motors (e.g. lifting platform, circular saws, planing

bench) Devices with large transmission ratio and ﬂywheel mass

Devices with compressors (e.g. compressed air compressors, air conditioning

systems)

IMPORTANT!

Very high starting currents can cause short-term distortion or a drop in output

voltage. The simultaneous operation of electronic devices in the same backup power supply system should be avoided.

IMPORTANT!

The inverter may only be operated within the limits of its technical capabilities. Operation outside of its technical capabilities can cause the inverter to shut down.

Data protection The user is responsible for the safekeeping of any changes made to the factory

settings. The manufacturer accepts no liability for any deleted personal settings.

The text and illustrations are all technically correct at the time of printing. We reserve the right to make changes. The contents of the operating instructions shall not provide the basis for any claims whatsoever on the part of the purchaser. If you have any suggestions for improvement, or can point out any mistakes that you have found in the instructions, we will be most grateful for your comments.

Protective earthing (PE)

Connection of a point in the device, system or installation to earth to protect against electric shock in the event of a fault. When installing a safety class 1 inverter (see Technical data), the ground conductor connection is required.

When connecting the ground conductor, ensure that it is secured against accidental disconnection. All the points listed in the chapter Connecting the invert-

er to the public grid (AC side) on page 69 must be observed. It must be ensured

that when using the strain relief devices, the ground conductor is the last to be disconnected in the event of a possible failure. When connecting the ground conductor, the minimum cross-section requirements specified by the respective national standards and guidelines must be observed.

General information

Fronius Primo GEN24

Device concept The inverter transforms the direct current generated by the solar modules into

alternating current. This alternating current is fed into the public grid and synchronized with the grid voltage in use. Moreover, the solar energy can also be stored in a connected battery for later use.

The inverter is intended for use in grid-connected photovoltaic systems. The inverter has backup power functions and switches to backup power mode if it has been wired accordingly*.

The inverter automatically monitors the public grid. Whenever conditions in the electric grid are inconsistent with standard conditions (for example, grid switchoff, interruption), the inverter will immediately stop producing power and interrupt the supply of power into the grid. The grid is monitored by monitoring the voltage, frequency and islanding conditions.

After installation and commissioning, the inverter's operation is fully automatic; the inverter draws the maximum possible power from the PV modules. Depending on the operating point, this power is used in the home, stored in a battery* or fed into the grid.

Function overview

As soon as the energy provided by the PV modules is no longer sufficient, the power from the battery is fed into the home. Depending on the setting, power may also be obtained from the public grid in order to charge the battery*.

When its temperature gets too high, the inverter automatically reduces the output or charging power, or switches off completely, in order to protect itself. Reasons for the temperature being too high include a high ambient temperature or insufficient heat dissipation (for example, inadequate heat dissipation when installed in switch cabinets).

* Depending on the device variant, suitable battery, appropriate wiring, set-

tings and local standards and guidelines.

Function Primo GEN24 Primo GEN24 Plus

Backup power variant - PV Point (OP)

Battery connection*

Backup power variant - Full Backup

Available as an op-

tion**

Available as an op-

tion**

* For suitable batteries, see chapter Suitable batteries. ** The functions are optionally available via Fronius UP (see chapter Fronius

UP).

Fronius UP With Fronius UP*, the inverter can be expanded by the authorised specialist to

include optionally available functions (see chapter Function overview).

* The availability of Fronius UP varies from country to country. For more in-

formation on Fronius UP and availability, see Installation guide: Fronius

GEN24 & GEN24 Plus.

Scope of supply

Intended use The inverter is designed to convert direct current from PV modules into alternat-

ing current and feed this power into the public grid. A backup power mode* is possible provided that appropriate cabling has been installed.

The following are considered improper use:

Utilisation for any other purpose, or in any other manner

Alterations to the inverter are not permitted unless expressly recommended

by Fronius Installation of components is not permitted unless expressly recommended

or sold by Fronius

(1) Housing cover (2) Inverter (3) Mounting bracket (illustration) (4) Quick Start guide

The manufacturer is not responsible for any damage resulting from improper use. All warranty claims are considered void in such cases.

Intended use also means:

Carefully reading and obeying all the instructions, as well as safety

and danger notices in the Operating Instructions Installation in accordance with chapter "Installation" from page 53.

When designing the photovoltaic system, ensure that all components of the photovoltaic system are operated exclusively within their permissible operating range.

Take into account the grid operator's regulations for energy fed into the grid and connection methods.

The Fronius GEN24 inverter is a grid-connected inverter with a backup power function – it is not a stand-alone inverter. The following restrictions must therefore be observed in backup power mode:

Backup power mode may be in operation for at max. 2000 hours

Backup power mode may be in operation for more than 2000 operating hours

if 20% of the duration of the inverter's grid power feed operation is not exceeded at the relevant time.

* Depending on the device variant, suitable battery, appropriate wiring, set-

tings, and local standards and guidelines.

Thermal concept Ambient air is drawn in by the fan on

the front side and blown out at the device sides. The even heat dissipation allows several inverters to be installed next to each other.

Fronius Solar.web

NOTE!

Risk due to insufficient cooling of the inverter.

This may result in a loss of power in the inverter.

Do not block the fan (for example, with objects that protrude through the

▶

touch guard). Do not cover the ventilation slots, even partially.

▶

Make sure that the ambient air can always ﬂow through the inverter's ventila-

▶

tion slots unimpeded.

With Fronius Solar.web or Fronius Solar.web Premium, the PV system can be easily monitored and analysed by the system owner and installer. If configured accordingly, the inverter transmits data such as power, yields, load, and energy balance to Fronius Solar.web. For more information see Solar.web - monitoring &

analysis.

Configuration is carried out via the setup wizard, see chapter Installation with

the app on page 100 or Installation using the web browser on page 100.

Prerequisites for configuration:

Internet connection (download: min. 512 kBit/s, upload: min. 256 kBit/s)*.

User account on solarweb.com.

Completed configuration via the setup wizard.

* The information given does not constitute an absolute guarantee of fault-

less function. High error rates in the transmission, reception ﬂuctuations or transmission drop-outs can have a negative effect on the data transfer.

Fronius recommends testing the Internet connection on site according to the minimum requirements.

Local communication

The inverter can be found via the Multicast DNS protocol (mDNS). It is recommended to search for the inverter by the assigned host name.

The following data can be retrieved via mDNS:

NominalPower

Systemname

DeviceSerialNumber

SoftwareBundleVersion

The various operating modes

Operating modes – Explanation of symbols

PV module

generates direct current

Fronius GEN24 inverter

converts direct current into alternating current and charges the battery (battery charging is only possible with Fronius GEN24 Plus inverters). The integrated system monitoring enables the inverter to be integrated into a network by means of WLAN.

Additional inverter in the system

converts the direct current into alternating current. However, it cannot charge a battery, and is not available in backup power mode.

Battery

is coupled to the inverter on the direct current side, and stores electrical energy.

Fronius Ohmpilot

for using excess energy to heat water.

Primary meter

records the system's load curve and provides measurement data for energy profiling in Fronius Solar.web. The primary meter also controls the dynamic feed-in control.

Secondary meter

records the load curve of individual loads (e.g. washing machine, lamps, TV, heat pump, etc.) in the consumption branch and provides measurement data for energy profiling in Fronius Solar.web.

Loads in the PV system

are the loads connected in the system.

Additional loads and generators in the system

are connected to the system by means of a Smart Meter.

PV Point

is a non-uninterruptible 1‑phase backup power circuit which supplies electrical devices with up to 3 kW if sufficient power is available from the PV modules or the battery.

Full Backup

the inverter is prepared for backup power mode. The backup power mode must be implemented in the switch cabinet by the electrician performing the installation. The PV system operates in a stand-alone manner in backup power mode.

Grid

supplies the loads in the system if insufficient power is being generated by the PV modules or supplied by the battery.

Operating mode

– Inverter with battery

Operating mode – Inverter with battery and several Smart Meters

In order to be able to obtain the highest rate of self-consumption with your PV system, a battery can be used to store excess energy. The battery is coupled to the inverter on the direct current side. Multiple current conversion is therefore not required, and the efficiency is increased.

Operating mode

- inverter with battery, ACcoupled to another inverter

Operating mode

– Inverter with battery and backup power function

IMPORTANT!

In backup power mode, an increased nominal frequency is used in order to prevent undesired parallel operation with other power generators.

In the fully equipped hybrid PV system, the inverter can:

Supply loads in the house

Store excess energy in the battery and/or feed it into the grid

Supply connected loads in the event of a power failure

Operating mode – Inverter with battery, Ohmpilot and backup power function

Operating mode – Inverter with battery, further inverter and backup power function

IMPORTANT!

In the fully equipped hybrid PV system with a Fronius Ohmpilot, the Ohmpilot cannot be operated in the event of a power failure for regulatory reasons. It is therefore sensible to install the Ohmpilot outside of the backup power branch.

In the hybrid photovoltaic system, batteries must only be connected to one inverter with battery support. Batteries cannot be split between multiple inverters with battery support. However, depending on the battery manufacturer, several batteries can be combined on one inverter.

Energy ﬂow dir-

AC~DC=

DC=

(1)

(2)

(4)

(3)

ection of the inverter

In the case of hybrid inverters, there are four different energy ﬂow directions:

(1) PV module – inverter – load/grid

Operating states (only for systems with a battery)

(2) PV module – inverter – battery* (3) Battery – inverter – load/grid* (4) Grid – inverter – battery*

* depending on the settings and local standards and regulations.

Battery systems distinguish different operating states. In this case, the relevant current operating state is displayed on the user interface of the inverter or in Solar.web.

Operating state Description

Normal operation Energy is stored or drawn, as required.

Operating state Description

Min. state of charge (SOC) achieved

Energy saving mode

(standby)

Start The storage system starts from energy saving

Forced re-charging The inverter re-charges the battery, in order to

Deactivated The battery is not active. It has either been deac-

Battery has reached the minimum SOC set or specified by the manufacturer. The battery cannot be discharged any further.

The system has been put into energy saving mode. Energy saving mode is automatically ended as soon as sufficient excess energy is available again.

mode (standby).

maintain the set minimum SOC (state of charge) or the SOC specified by the manufacturer (protection against deep discharge).

tivated/switched off, or an error means that no communication with the battery is possible.

Energy saving mode

General Energy saving mode (standby mode) is used to reduce the self-consumption of

the system. Both the inverter and the battery automatically switch to energy saving mode under certain conditions.

The inverter switches to energy saving mode if the battery is ﬂat and no PV power is available. Only the inverter's communication with the Fronius Smart Meter and Fronius Solar.web is maintained.

Switch-off conditions

Switch-on conditions

If all the switch-off conditions are met, the battery switches into energy saving mode within ten minutes. This time delay ensures that the inverter can at least be restarted.

The battery state of charge is less than or equal to the input

minimum state of charge.

The current charging or discharging power of the battery is

less than 100 W.

Less than 50 W is available for charging the battery. The

power of feeding into the public grid is at least 50 W less than the power currently required in the home network.

The inverter automatically switches into energy saving mode, following the battery.

If one of the following conditions is met for at least 30 seconds, energy saving mode is ended:

Energy saving mode is no longer permissible owing to a changed setting on

the user interface of the inverter. If dynamic power reduction of 0 is set, or if the system is operating in backup

power mode, the power of feeding into the public grid is always less than the required power in the home network. There is a separate condition for this case (dynamic power reduction < 300 W or active backup power mode):

If the PV power is above a specified threshold, energy saving mode is

ended.

Battery charging from the public grid is requested via the user interface of

the inverter. The battery is being recharged in order to restore the minimum state of

charge or perform calibration.

Special case If the inverter does not operate for 12 minutes (e.g. fault), or there is an interrup-

tion in the electrical connection between the inverter and the battery and there is no backup power mode, the battery switches to energy-saving mode in any case. This reduces self discharge of the battery.

Indication of en-

Energy-saving mode

ergy saving mode

During energy saving mode:

Operating LED for the inverter lights up orange (see Button functions and

LED status indicator on page 35).

The user interface of the inverter can be reached.

All the available data is saved and transmitted to Solar.web.

The real-time data can be seen on Solar.web.

Energy saving mode is shown on the user interface of the inverter and in Solar.web by an "i" beside the battery symbol in the system overview.

Suitable batteries

General Fronius explicitly points out that the third-party batteries are not Fronius

products. Fronius is not the manufacturer, distributor or retailer of these batteries. Fronius accepts no liability and offers no service or guarantees for these batteries.

Obsolete firmware/software states may lead to incompatibilities between the inverter and the battery. In this case, the following steps are to be performed:

Update battery software – see the battery documentation.

Update inverter firmware – see Update on page 118.

Read this document and the Installation Instructions before installing and commissioning the external battery. The documentation is either enclosed with the external battery or can be obtained from the battery manufacturer or their service partners

All documents associated with the inverter can be found at the following address:

https://www.fronius.com/en/solar-energy/installers-partners/service-support/ tech-support

Limitations in operation

BYD BatteryBox Premium

If the DC voltage exceeds 520 V, the battery can no longer be charged or discharged. The voltage of 520 V is rarely exceeded during normal operation of the inverter.

When the output power of the inverter is reduced, the operating point shifts towards higher DC voltages. The following conditions during normal operation can lead to the DC voltage of 520 V being exceeded:

Overdimensioning of the PV generator.

Feed-in limitation (e.g. zero feed-in).

Specifications of the grid operator (e.g. mains voltage-dependent power re-

duction). Backup power mode. If the 520 V voltage is exceeded during backup power,

backup power operation may be restricted. Therefore, an open circuit voltage of max. 520 V is recommended.

BYD Battery-Box Premium HVS 5.1 7.7 10.2 12.8

Fronius Primo GEN24 3.0 - 6.0*

Fronius Primo GEN24 3.0 - 6.0 Plus

Number of battery modules 2 3 4 5

Battery parallel operation**

BYD Battery-Box Premium HVM 8.3 11.0 13.8 16.6 19.3 22.1

Fronius Primo GEN24 3.0 - 6.0*

BYD Battery-Box Premium HVM 8.3 11.0 13.8 16.6 19.3 22.1

Fronius Primo GEN24 3.0 - 6.0 Plus

Number of battery modules 3 4 5 6 7 8

Battery parallel operation**

* Battery support optionally available. ** Max. 3 batteries with the same capacity can be combined.

IMPORTANT!

According to the manufacturer's specifications, the max. DC cable length is 20 m. More detailed information can be found in the manufacturer's documents.

IMPORTANT!

To ensure reliable operation with a BYD Battery-Box Premium, the following switch-on sequence for the system must always be observed.

Switch on the battery.

LG RESU FLEX

Set the DC disconnector to the "On" switch position. Switch on the automatic circuit breaker.

LG RESU FLEX 8.6 12.9 17.2

Fronius Primo GEN24 3.0 - 10.0*

LG RESU FLEX 8.6 12.9 17.2

Fronius Primo GEN24 3.0 - 10.0 Plus

Number of battery modules 2 3 4

* Battery support optionally available.

IMPORTANT!

According to the manufacturer's specifications, the max. DC cable length is 30 m. More detailed information can be found in the manufacturer's documents.

Switching on the battery

Pull off the cover to the right.

Pull off the cover of the DC disconnector to the front. Set the DC disconnector to the "On" switch position.

To refit the battery, follow the steps listed above in reverse order.

Manual system start

Requirements There is no energy available from the PV modules or from the public grid. If

backup power operation or battery operation are not possible (e.g. deep discharge protection of the battery), the inverter and battery switch off.

Notification of system shutdown

Manual battery start after system shutdown

Starting backup power operation after a system shutdown

Status codes about the inactive state of the battery are displayed on the user interface of the inverter or sent via Solar.web by means of SMS or e-mail (only if notification via Solar.web is configured accordingly).

As soon as energy is available again, the inverter starts operation automatically; however the battery must be started manually. The switch-on sequence must be observed for this, see chapter Suitable batteries on page 26.

The inverter requires energy from the battery to start backup power operation. This is done manually on the battery; further information on the power supply for restarting the inverter via the battery can be found in the battery manufacturer's Operating Instructions.

Protection of people and equipment

Central grid and system protection

WSD (wired shutdown)

RCMU The inverter is equipped with a universal current-sensitive residual current monit-

The inverter offers the option to use the integrated AC relays as coupling switches in conjunction with a central grid and system protection unit (in accordance with VDE-AR-N 4105:2018:11 §6.4.1). For this purpose, the central trigger device (switch) must be integrated into the WSD chain as described in the chapter "WSD (Wired Shut Down)".

The wired shutdown (WSD) interrupts the inverter feeding energy into the grid if the trigger device (switch, e.g. emergency stop or fire alarm switch) has been activated.

If an inverter (secondary device) fails, it is bypassed and the other inverters continue operating. If a second inverter (secondary device) or the inverter (primary device) fails, the operation of the entire WSD chain is interrupted.

For installation, see Installing the WSD (wired shutdown) on page 98.

oring unit (RCMU = Residual Current Monitoring Unit) in accordance with IEC 62109-2 and IEC63112. This device monitors residual currents from the PV module to the AC output of the inverter and disconnects the inverter from the grid in the event of unauthorised residual current.

Safe state If one of the following safety devices trips, the inverter will change to a safe

state:

WSD

insulation measurement and

RCMU

In the safe state, the inverter no longer feeds into the grid and is disconnected from the grid by opening the AC relays.

Surge protective device

The inverter is equipped with an integrated surge protective device on the DC and AC side in accordance with IEC 62109-2. The surge protective device protects the system against damage in the event of a surge.

Control elements and connections

Connection area

(1) 2 x 5-pin DC push-in terminal (2) Push-in WSD (wired shutdown) terminal (3) Push-in terminals in the data communication area (Modbus, digital inputs

and outputs) (4) 3-pin push-in terminal for PV Point (OP) (5) 3-pin AC push-in terminal (6) Cable gland/strain-relief device AC (7) 6-pin ground electrode terminal (8) Cable gland/strain-relief device in the data communication area

(9) Connection area divider (10) 10 x DC cable glands (11) Optional cable gland (M16) (12) Optional cable gland (M16 - M20) (13) Optional cable gland (M16 - M32) (14) Optional cable gland (M16 - M25)

Connection area divider

Ground electrode terminal

The connection area divider separates the high-voltage conductors (DC and AC) from the signal lines. To make it easier to reach the connection area, the divider can be removed for the connection work, and must be re-inserted.

(1) Integrated cable duct (2) Recesses for removing the con-

nection area divider (3) Snap tabs for locking/unlocking (4) Defined breaking point for the

Datcom connection

The integrated cable duct (1) allows for the lines to be laid from one area of the inverter to the other. As a result, multiple inverters can be easily installed next to each other.

The ground electrode terminal allows additional components to be earthed, such as:

AC cable

Module mounting system

Ground rod

DC disconnector The DC disconnector has 3 switch set-

tings:

(1) Locked/off (turned to the left) (2) Off (3) On

IMPORTANT!

In switch settings (1) and (3), a conventional padlock can be used to secure the inverter against being switched on/ off. The national guidelines must be complied with in this respect.

Data communication area

Modbus terminal Push-in terminal for the installation of

Modbus 0, Modbus 1, 12 V and GND (ground).

The data connection to the connected components is established via the Modbus terminal. The inputs M0 and

M1 can be selected for this purpose.

Max. 4 Modbus participants per input, see chapter Modbus participants on page 93.

WSD (wired shutdown) switch Defines the inverter as a WSD primary

device or WSD secondary device.

Position 1: WSD primary device Position 0: WSD secondary device

Modbus 0 (MB0) switch Switches the terminating resistor for

Modbus 0 (MB0) on/off.

Position 1: Terminating resistor on (factory setting)

Position 0: Terminating resistor off

Modbus 1 (MB1) switch Switches the terminating resistor for

Modbus 1 (MB1) on/off.

Position 1: Terminating resistor on (factory setting)

Position 0: Terminating resistor off

Optical sensor

Communication LED

Operating status LED

LAN 1 Ethernet connection for data commu-

LAN 2 Reserved for future functions. Only

WSD terminal Push-in terminal for the WSD installa-

IOs terminal Push-in terminal for digital inputs/

To operate the inverter. See chapter

Button functions and LED status indicator on page 35.

Indicates the inverter connection status.

Indicates the inverter operating status.

nication (e.g. WLAN router, home network or for commissioning with a laptop see chapter Installation using

the web browser on page 100).

use LAN 1 to avoid malfunctions.

tion. See chapter "WSD (wired shut-

down)" on page 30.

outputs. See chapter Permitted

cables for the data communication connection on page 66.

The designations (RG0, CL0, 1/5, 2/6, 3/7, 4/8) on the terminal refer to the Demand Response Mode function, see chapter Functions andI/Os on page

107.

Button functions

Standby

Uncritical Error (flashing)

Critical Error

Network Error

Connecting (flashing)

Connected

1x WLAN access point 2x WPS 3-6 sec. Quit Service Message

and LED status indicator

Sensor functions

The status of the inverter is

shown via the operating status

LED. In the event of faults,

carry out the individual steps

in the Fronius Solar.start app.

The optical sensor is actuated

by touching with a finger.

The status of the connection is

shown via the communication

LED. To establish the connec-

tion, carry out the individual

steps in the Fronius Solar.start

app.

1x = WLAN Access Point (AP) is opened.

Flashing blue

LED status indicator

2x = WLAN Protected Setup (WPS) is activated.

Flashing green

3 seconds (max. 6 seconds) = the service message is terminated.

Lights up yellow

The inverter is operating correctly.

Lights up green

The inverter starts.

Flashing green

The inverter is in standby, is not operational (e.g. no feed-in at night) or is not configured.

Lights up yellow

The inverter indicates a non-critical status.

Flashing yellow

The inverter indicates a critical status and there is no grid power feed process.

Lights up red

LED status indicator

The inverter indicates a back-up power overload.

Flashing red

The network connection is being established via WPS. 2x = WPS search mode.

Flashing green

The network connection is being established via WLAN AP.

1x = WLAN AP search mode (active for 30 minutes).

Flashing blue

The network connection is not configured.

Lights up yellow

The inverter is operating correctly, a network fault is indicated.

Lights up red

Internal schematic connection diagram of the IOs

The inverter is performing an update.

/ Flashing blue

On the V+/GND pin, it is possible to feed in a voltage of around 12.5–24 V (+ max. 20%) with an external power supply. The outputs IO 0–5 can then be operated with the external voltage. A maximum of 1 A can be drawn per output, with a maximum of 3 A allowed in total. The fuse protection must be located externally.

CAUTION!

Risk of polarity reversal at the terminals due to improper connection of external power supplies.

This may result in severe damage to the inverter.

Check the polarity of the external power supply with a suitable measuring

▶

device before connecting it. Connect the cables to the V+/GND outputs with the correct polarity.

▶

IMPORTANT!

If the total output (6 W) is exceeded, the inverter switches off the entire external power supply.

12 V DC

500 mA

V+ V+

GND

IO0

IO1

IN8

IN9

IN10

IN11

IN6

IN7

IO4

IO5

IO2

IO3

GND

(1)

12 V

USB

TYP A

5 V

IO4

V+

IO0

IO2

IN6

IN8

IN10IN11

IN9

IN7

IO5

IO3

IO1

GND

M0-

M0+

M1-

M1+

SHIELD

V+ V+

GND GND

V+

M0+

SHIELD

M1+

GND

M1-

SHIELD

M0-

GND

(1) Power limitation

Backup power variant - PV Point

(OP)

General

PV Point (OP) IMPORTANT!

If several backup power variants are available, please note that only one backup power variant may be installed and configured.

With the PV Point, in the event of a failure of the public grid, electrical devices can be connected to the Opportunity Power (OP) terminal and supplied with a maximum power of 3 kW, if enough power is available from the PV modules or an optional battery. In grid-connected operation, the OP terminal is not supplied with voltage, therefore the connected loads will not be supplied with power in this operating mode.

IMPORTANT!

A relay-based network switching setup is not possible.

Explanation - PV Point (OP)

The inverter can provide 220 ‑ 240 V at the PV Point. A corresponding configuration must be set up during commissioning.

At 220 ‑ 240 V output voltage, max. 13 A AC continuous current is available.

Example:

230 V *13 A = 2860 W 240 V *13 A = max. 3 kW

In backup power mode, some electrical appliances cannot function properly as starting currents are too high (for example, fridges and freezers). It is recommended to switch off non-essential loads during backup power mode. Overload capacity of 35% is possible for a duration of 5 seconds, depending on the capacity of the PV modules and/or the battery at that moment in time.

There is a brief interruption when switching from grid-connected mode to backup power mode. For this reason, the backup power function cannot be used as an uninterruptible power supply, for example for computers.

If no energy from the battery or the solar modules is available in backup power mode, backup power mode ends automatically. If sufficient energy becomes available from the solar modules once again, backup power mode starts again automatically.

In the event of excessive consumption, backup power mode is stopped and the "backup power overload" status code is displayed on the inverter's LED status indicator. The maximum power in backup power mode according to the technical data must be observed.

Backup power variant - Full Backup

General

Prerequisites for backup power mode

IMPORTANT!

If several backup power variants are available, please note that only one backup power variant may be installed and configured.

In order to use the inverter's backup power function, the following prerequisites must be fulfilled:

The inverter must support the backup power variant – Full Backup (see

chapter Function overview on page 15). A battery suitable for backup power use must be installed and configured.

Correct cabling of the backup power system in the electrical installation or

usage of a switch box from Enwitec (see chapter Components for automatic

Full Backup backup power changeover on page 163 or Circuit diagrams on

page 189). Mount and configure the Fronius Smart Meter at the feed-in point.

Attach a warning notice for the backup power supply (https://www.froni-

us.com/en/search-page, item number: 42,0409,0275) on the electrical distributor. Apply the necessary settings in the "Devices and system components" →

"Functions and pins" → "Backup power" menu area and activate backup

power. Follow the backup power checklist (https://www.fronius.com/en/search-

page, item number: 42,0426,0365) step by step and confirm.

Transitioning from feeding energy into the grid to backup power mode

Transitioning from backup power mode to feeding energy into the grid

The public grid is monitored by the inverter's internal grid and system pro-

1. tection unit and by the Fronius Smart Meter connected to it.

The public grid fails or specific grid parameters are dropped below or ex-

ceeded.

The inverter carries out the measures necessary according to the country

3. standard and then switches off. The inverter starts backup power mode after a checking period.

4. All loads in the household that are in the backup power circuit are supplied

5. by the battery and the PV modules. The remaining loads are not supplied with power and are safely isolated.

The inverter is operating in backup power mode.

The public grid is functioning correctly again.

2. The Fronius Smart Meter monitors the grid parameters on the public grid

3. and passes this information to the inverter. The stability of the returned public grid is determined by checking the meas-

4. ured values of the Fronius Smart Meter. The inverter ends backup power mode.

5. All circuits are reconnected to the public grid and are supplied by the grid.

6. The inverter can start feeding energy into the grid again after performing the

7. grid checks required by the relevant standard.

Backup power and energy saving mode

Under the following conditions, the battery and the inverter are switched to energy saving mode after a waiting time of 8 - 12 minutes and backup power mode is ended:

The battery is discharged to the minimum state of charge and no energy is

coming from the PV modules. The inverter is set to energy saving mode (standby mode).

If the battery and inverter are in energy saving mode, the system is reactivated by the following:

Enough energy is available from the PV modules.

The public grid is functioning again.

The battery is switched off and on.

Cabling variants including backup power circuits with 1-pin separation e.g. Austria or Australia

Functions

Transitioning from feeding energy into the grid to backup power mode

Measuring and transferring the required parameters for energy management

and Solar.web by the Fronius Smart Meter. Disconnecting from the public grid to enable operation in backup power

mode if the grid parameters are outside the country-specific standards. Reconnecting to the public grid when the grid parameters are within the lim-

its specified by the country-specific standards. Option of having a separate backup power circuit or several backup power

circuits that are supplied even during failure of the public grid. The total load of the backup power circuits must not exceed the nominal output of the inverter. Furthermore, the performance of the connected battery must also be considered.

The public grid is monitored by the inverter's internal grid and system pro-

1. tection unit and by the Fronius Smart Meter connected to it. Failure of the public grid.

2. The inverter carries out the necessary measures according to the country

3. standard and then switches off. Contactors K1 and K2 (K2 - optional in Australia) drop out. This disconnects the backup power circuits and the inverter from the rest of the home network and from the public grid, as the main contacts of the contactors K1 and K2 1-pin open. The inverter activates relay K3, which interrupts the supply to contactors K1 and K2. This prevents unintentional activation of contactors K1 and K2 and thus a grid connection when voltage is restored in the grid. The NC auxiliary contacts of contactors K1 and K2 send feedback to the inverter that the contactors are open (a condition for starting backup power mode). The NO contact of relay K3 gives additional feedback to the inverter on

4. whether the locking was successfully performed by relay K3. The inverter decides based on the contactors' feedback as well as the meas-

5. urements on the inverter terminals and the Smart Meter that backup power mode can be started. After all the required activation tests have been carried out, the inverter

6. starts backup power mode. All loads in the backup power circuits are supplied with power. The remaining

7. loads are not supplied with power and are safely isolated.

Transitioning from backup power mode to feeding energy into the grid

The inverter is operating in backup power mode. The contactors K1 and K2 to

1. the public grid are open.

Public grid available again.

2. The Fronius Smart Meter monitors the grid parameters on the public grid

3. and passes this information to the inverter. The stability of the returned public grid is determined by checking the meas-

4. ured values of the Fronius Smart Meter. The inverter ends backup power mode and disconnects the outputs.

5. The inverter deactivates K3. The contactors K1 and K2 are reactivated.

6. All circuits are reconnected to the public grid and are supplied by the grid.

7. The inverter does not feed anything into the grid at this time. The inverter can start feeding energy into the grid again after performing the

8. grid checks required by the relevant standard.

All-pin separation cabling variant e.g. Germany, France, Spain, UK

Functions

Transitioning from feeding energy into the grid to backup power mode

Measuring and transferring the required parameters for energy management

and Solar.web by the Fronius Smart Meter. Disconnecting from the public grid to enable operation in backup power

mode if the grid parameters are outside the country-specific standards. Reconnecting to the public grid when the grid parameters are within the lim-

its specified by the country-specific standards. Establishing a proper ground connection for backup power mode to ensure

the protection devices function correctly. Option of having a separate backup power circuit or several backup power

The public grid is monitored by the inverter's internal grid and system pro-

1. tection unit and by the Fronius Smart Meter connected to it. Failure of the public grid.

2. The inverter carries out the necessary measures according to the country

3. standard and then switches off. Contactors K1, K2 (K2 - optional in France and Spain), K4 and K5 drop out. This disconnects the backup power circuits and the inverter from the rest of the home network and from the public grid, as the main contacts of the contactors K1 and K2 all-pin open. The NC auxiliary contacts of contactors K1 and K2 send feedback to the inverter that the contactors are open (a condition for starting backup power mode). The NC main contacts of contactors K4 and K5 are closed, establishing a

4. connection between the neutral conductor and the ground conductor. The two other NC main contacts of contactors K4 and K5 give feedback to the inverter that the ground connection has been established correctly (a condition for starting backup power mode). The inverter activates relay K3, which interrupts the supply to contactors K1,

5. K2, K4 and K5. This prevents unintentional activation of contactors K1, K2, K4 and K5 and thus a grid connection when voltage is restored in the grid. The NO contact of relay K3 gives additional feedback to the inverter on

6. whether the locking was successfully performed by relay K3. The inverter decides based on the contactors' feedback as well as the meas-

7. urements on the inverter terminals and the Smart Meter that backup power mode can be started. After all the required activation tests have been carried out, the inverter

8. starts backup power mode. All loads in the backup power circuits are supplied with power. The remaining

9. loads are not supplied with power and are safely isolated.

Transitioning from backup power mode to feeding energy into the grid

The inverter is operating in backup power mode. The contactors K1 and K2 to

1. the public grid are open.

Public grid available again.

2. The Fronius Smart Meter monitors the grid parameters on the public grid

3. and passes this information to the inverter. The stability of the returned public grid is determined by checking the meas-

4. ured values of the Fronius Smart Meter. The inverter ends backup power mode and disconnects the outputs.

5. The inverter deactivates K3. Power is restored to contactors K1, K2, K4 and

6. K5. All circuits are reconnected to the public grid and are supplied by the grid.

7. The inverter does not feed anything into the grid at this time. The inverter can start feeding energy into the grid again after performing the

8. grid checks required by the relevant standard.

All-pin separation cabling variant, Italy

Functions

Transitioning from feeding energy into the grid to backup power mode

Measuring and transferring the required parameters for energy management

and Solar.web by the Fronius Smart Meter. Monitoring of the voltage and frequency grid parameters by the inverter.

Disconnecting from the public grid to enable operation in backup power

mode if the grid parameters are outside the country-specific standards. Reconnecting to the public grid when the grid parameters are within the lim-

its specified by the country-specific standards. Establishing a correct ground connection for backup power mode.

Option of having a separate backup power circuit or several backup power

The public grid is monitored by the inverter's internal grid and system pro-

1. tection unit and by an external grid and system protection unit.

Failure of the public grid

2. The inverter carries out the measures necessary according to the country

3. standard and then switches off. The external grid and system protection unit opens contactors K1 and K2 for

4. grid monitoring. This disconnects the backup power circuits and the inverter from the rest of the home network and from the public grid, as the main contacts of the contactors K1 and K2 all-pin open. To ensure that the public grid has definitely been disconnected, the NC auxiliary contacts of contactor K1 give feedback to the external grid and system protection unit. The NC main contacts of contactors K4 and K5 are closed, establishing a

5. connection between the neutral conductor and the ground conductor. The two other NC main contacts of contactors K4 and K5 give feedback to the inverter that the ground connection has been established correctly. The inverter activates relay K3, which activates the remote input of the ex-

6. ternal grid and system protection unit via an NC contact. This prevents a connection to the public grid when voltage is restored in the grid. The NO contact of relay K3 gives additional feedback to the inverter on

7. whether the locking was successfully performed by relay K3. The inverter decides based on the contactor's feedback as well as the meas-

8. urement on the inverter terminals and the Smart Meter that the emergency power mode can be activated. The inverter starts backup power mode after a defined checking period.

9. All loads in the backup power circuits are supplied with power. The remaining

10. loads are not supplied with power and are safely isolated.

Transitioning from backup power mode to feeding energy into the grid

The inverter is operating in backup power mode. The contactors K1 and K2 to

1. the public grid are open.

Public grid available again.

2. The Fronius Smart Meter monitors the grid parameters on the public grid

3. and passes this information to the inverter. The stability of the returned public grid is determined by checking the meas-

4. ured values of the Fronius Smart Meter. On the basis of adjustments that have been carried out, the inverter ends

5. backup power mode and disconnects the outputs. The inverter deactivates K3. Power is restored to contactors K1, K2, K4 and

6. K5. All circuits are reconnected to the public grid and are supplied by the grid.

7. The inverter does not feed anything into the grid at this time. The inverter can start feeding energy into the grid again after performing the

8. grid checks required by the relevant standard.

Installation

General

Quick-lock system

A quick-lock system (3) is used to mount the connection area cover and front cover. The system is opened and closed with a half-rotation (180°) of the captive screw (1) into the quicklock spring (2).

The system is independent of torque.

NOTE!

Danger when using a drill driver.

This may result in the destruction of the quick-lock system due to overtorque.

Use a screwdriver (TX20).

▶

Do not turn the screws more than 180°.

▶

Warning notices on the device

Technical data, warning notices and safety symbols are affixed to the inverter. These warning notices and safety symbols must not be removed or painted over. They warn against incorrect operation which can lead to serious injury and damage.

A 4-digit number (coded production date) is printed on the rating plate at the very bottom, from which the production date can be calculated. If you subtract the value 11 from the first two digits, you get the production year. The last two digits stand for the calendar week in which the device was produced.

Example: Value on rating plate = 3205 32 - 11 = 21 → Production year 2021 05 = Calendar week 05

Symbols on the rating plate:

CE mark – confirms compliance with applicable EU directives and regulations.

UKCA mark – confirms compliance with applicable UK directives and regulations.

WEEE mark – waste electrical and electronic equipment must be collected separately and recycled in an environmentally sound manner in accordance with the European Directive and national law.

RCM mark – tested in accordance with the requirements of Australia and New Zealand.

ICASA mark – tested in accordance with the requirements of the Independent Communications Authority of South Africa.

CMIM mark – tested in accordance with IMANOR requirements for import regulations and compliance with Moroccan standards.

Safety symbols:

Risk of serious injury and property damage due to incorrect operation.

Do not use the functions described here until you have fully read and understood the following documents:

These Operating Instructions.

All the Operating Instructions for the photovoltaic system compon-

ents, especially the safety rules.

Dangerous electrical voltage.

Allow the capacitors of the inverter to discharge (2 minutes).

Warning notice text:

WARNING!

An electric shock can be fatal. Before opening the device, it must be disconnected and de-energized at the input and output.

System component compatibility

All installed components in the photovoltaic system must be compatible and have the necessary configuration options. The installed components must not restrict or negatively inﬂuence the functioning of the photovoltaic system.

NOTE!

Risk due to components in the photovoltaic system that are not compatible and/or have limited compatibility.

Incompatible components may limit and/or negatively affect the operation and/or functioning of the photovoltaic system.

Only install components recommended by the manufacturer in the photovol-

▶

taic system. Before installation, check the compatibility of components not expressly re-

▶

commended with the manufacturer.

Installation location and position

≥ 200 mm

(≥ 7.87 inch)

≥ 200 mm

(≥ 7.87 inch)

≥ 440 mm (≥ 17.32 inch)

≥ 250 mm

(≥ 9.84 inch)

≥ 225 mm

(≥ 8.86 inch)

≥ 270 mm (≥ 10.63 inch)

≥ 150 mm (≥ 5.91 inch)

≥ 100 mm (≥ 3.94 inch)

-40°C - +60°C

-40°F - +140°F 0 - 100%

Choosing the location of the inverter

Please note the following criteria when choosing a location for the inverter:

Only install on a solid, non-ﬂam-

mable surface.

Max. ambient temperatures:

-40 °C - +60 °C

-40 °F - +140 °F

Relative humidity: 0-100%

If the inverter is installed in a switch cabinet or similar enclosed space, ensure sufficient heat dissipation with forced-air ventilation.

For detailed information on the dimensions of the inverter, see chapter

Fronius Primo GEN24 3 - 6 kW on

page 207.

When installing the inverter on the outer walls of cattle sheds, it is important to maintain a minimum clearance of 2 m between the inverter and the ventilation and building openings on all sides.

The following substrates are permissible for installation:

Walls (corrugated metal walls [mounting rails], brick walls, concrete walls,

or other non-ﬂammable surfaces sufficiently capable of bearing loads) Mast or support (installed using mounting rails, behind the PV modules

directly on the PV mounting system) Flat roofs (if installing on a foil roof, make sure that the foils adhere to the

fire protection requirements and are thus not easily ﬂammable. Ensure compliance with the national provisions.) Covered car park roofs (no overhead installation)

The inverter is suitable for indoor installation.

The inverter is suitable for outdoor installation.

Due to its protection class IP 66, the inverter is insensitive to water jets from all directions and can also be used in humid environments.

In order to minimise the heating up of the inverter, do not expose it to direct insolation.

The inverter should be installed in a protected location, for ex-

4001 m

0 m

ample, below the PV modules or under an overhanging roof.

The inverter must not be installed or used at altitudes above 4 000 m.

Do not install the inverter in:

Areas where it may be exposed to ammonia, corrosive

gases, acids or salts (e.g. fertiliser storage areas, vent openings for livestock stables, chemical plants, tanneries, etc.)

During certain operating phases the inverter may produce a slight noise. For this reason it should not be installed in an occupied living area.

Do not install the inverter in:

Areas where there is an increased risk of accidents from

farm animals (horses, cattle, sheep, pigs, etc.) Stables or adjoining areas

Storage areas for hay, straw, chaff, animal feed, fertilizers,

etc.

Choosing the location of thirdparty batteries

The inverter is designed to be dustproof (IP 66). In areas of high dust accumulation, dust deposits may collect on the cooling surfaces, and thus impair the thermal performance. Regular cleaning is required in this case, see chapter Operation in dusty

environments on page 159. We therefore recommend not in-

stalling the device in areas and environments with high dust accumulation.

Do not install the inverter in:

Greenhouses

Storage or processing areas for fruit, vegetables or viticul-

ture products Areas used in the preparation of grain, green fodder or an-

imal feeds

IMPORTANT!

Refer to the manufacturer's documents for the suitable location for third-party batteries.

Installation position of inverter

The inverter is suitable for vertical installation on a vertical wall or column.

The inverter is suitable for installation on a sloping surface (min. slope to underside 10°).

Do not install the inverter on a sloping surface with its connection sockets at the top.

Do not install the inverter at an angle on a vertical wall or column.

Do not install the inverter horizontally on a vertical wall or pillar.

Do not install the inverter on a vertical wall or pillar with its connection sockets facing upwards.

Do not install the inverter overhanging with the connection sockets at the top.

Do not install the inverter overhanging with the connection sockets at the bottom.

Do not install the inverter on the ceiling.

Install the mounting bracket and hang up the inverter

Selecting the fixing material

Properties of the mounting bracket

Use the corresponding fixing materials depending on the subsurface and observe the screw dimension recommendations for the mounting bracket. The installer is responsible for selecting the correct type of fixing.

The mounting bracket (illustration) can also be used as a guide.

The pre-drilled holes on the mounting bracket are intended for screws with a thread diameter of 6-8 mm (0.24-0.32 inches). The distance from the left to the right pre-drilled hole is 406 mm (16 inches).

Unevenness on the mounting surface (such as coarse-textured plaster) is largely compensated by the mounting bracket.

Do not deform the mounting bracket

Fitting the mounting bracket to a wall

NOTE!

When fitting the mounting bracket to the wall or column, ensure that the mounting bracket does not become deformed.

A deformed mounting bracket may make it difficult to clip/swivel the inverter into position.

IMPORTANT!

When installing the mounting bracket, make sure that it is installed with the arrow pointing upwards.

1 2

Installing the mounting bracket on a mast or beam

When installing the inverter on a mast or beam, Fronius recommends using the "Pole clamp" (order no. SZ

2584.000) mounting kit from Rittal GmbH.

The "Pole clamp" kit covers the following dimensions:

Rectangular mast or beam with a

side length of 50-150 mm (1.97-5.91 inches) Round mast or beam with a dia-

meter of 40-190 mm (1.57-7.48 inches)

Attaching the mounting bracket to mounting rails

IMPORTANT!

The mounting bracket must be affixed at a minimum of four points.

Attaching the inverter to the mounting bracket

There are integrated grips on the side of the inverter which facilitate lifting/ attaching.

Clip the inverter into the mounting bracket from above. The connections must point downwards.

Push the lower part of the inverter into the snap-in tabs until the inverter audibly clicks into place on both sides.

Check that the inverter is correctly positioned on both sides.

Prerequisites for connecting the inverter

Permissible cables for the

Cables with the following design can be connected to the terminals of the inverter:

electrical connection

Copper: round, solid

Copper: round, fine-stranded, up to conductor class 4

Grid connections with push-in terminal*

Select a sufficiently large cable cross section based on the actual device output!

Power

categories

3 - 6 kW

(2 x 5-pin)

Solid Multi-stranded Fine-stranded

4 - 10 mm

AWG 12-8

4 - 10 mm

AWG 12-8

4 - 10 mm

AWG 12-8

Fine-stranded with ferrules‐

with/without collar

Ground electrode terminal (6-pin)

Select a sufficiently large cable cross section based on the actual device output.

Number of

pins

Solid Multi-stranded Fine-stranded

2.5 - 16 mm AWG 14-6

2.5 - 10 mm AWG 14-8

2.5 - 16 mm AWG 14-6

2.5 - 10 mm AWG 14-8

2.5 - 16 mm AWG 14-6

2.5 - 10 mm AWG 14-8

Fine-stranded with ferrules‐

with/without collar

2.5 - 16 mm

2.5 - 10 mm

* According to product standard IEC 62109, the ground conductor must

correspond to the phase cross-section for phase cross-sections ≤16 mm²; for phase cross-sections >16 mm², it must correspond to at least 16 mm².

** The cable cross section must be dimensioned in accordance with the in-

stallation situation and the specifications of the battery manufacturer.

4 - 6 mm

AWG 12-10

AWG 14-6

AWG 14-8

Permitted cables for the data

Cables with the following design can be connected to the terminals of the inverter:

communication connection

Copper: round, solid

Copper: round, fine-stranded

IMPORTANT!

Connect the individual conductors to an appropriate ferrule if several individual conductors are connected to one input of the push-in terminals.

WSD connections with push-in terminal

Dis-

tance

max.

100 m

109 yd

Strip-

ping

length

10 mm

0.39 inch

Solid

0.14 -

1.5 mm

AWG 26 - 16

Fine-stran-

1.5 mm

AWG 26 - 16

Modbus connections with push-in terminal

Dis-

tance

max.

300 m

328 yd

Strip-

ping

length

10 mm

0.39 inch

Solid

0.14 -

1.5 mm

AWG 26 - 16

Fine-stran-

1.5 mm

AWG 26 - 16

IO connections with push-in terminal

Dis-

tance

max.

Strip-

ping

length

Solid

Fine-stran-

ded

0.14 -

ded

0.14 -

ded

Fine-stran-

ded with fer-

rules with

collar

0.14 - 1 mm AWG 26 - 18

Fine-stran-

ded with fer-

rules with

collar

0.14 - 1 mm AWG 26 - 18

Fine-stran-

ded with fer-

rules with

collar

Fine-stran-

ded with fer-

rules without

1.5 mm

AWG 26 - 16

Fine-stran-

ded with fer-

rules without

1.5 mm

AWG 26 - 16

Fine-stran-

ded with fer-

rules without

collar

0.14 -

collar

0.14 -

collar

Cable re-

commenda-

tion

min. CAT 5

UTP (un-

shielded

twisted pair)

Cable re-

commenda-

tion

min. CAT 5

STP (shiel-

ded twisted

pair)

Cable re-

commenda-

tion

30 m

32 yd

10 mm

0.39 inch

0.14 -

1.5 mm

AWG 26 - 16

0.14 -

1.5 mm

AWG 26 - 16

0.14 - 1 mm AWG 26 - 18

1.5 mm

AWG 26 - 16

0.14 -

ductor pos-

sible

Single con-

LAN connections

Fronius recommends at least CAT 5 STP (Shielded Twisted Pair) cables and a maximum distance of 100 m (109 yd).

Cross section of the AC cable

For a standard M32 metric screw joint with a reducer: Cable diameter from 7 - 15 mm

When using an M32 metric screw joint (reducer removed): cable diameter from 11-21 mm

(with a cable diameter of less than 11 mm, the strain-relief force is reduced from 100 N to a maximum of 80 N)

With cable diameters greater than 21 mm, the M32 screw joint must be replaced by an M32 screw joint with a larger clamping area – item number: 42,0407,0780 – strain-relief device M32 x 1.5 KB 18–25.

Cross section of the DC cable

Maximum alternating current fuse protection

Cable diameter for the strain-relief device: max. 9 mm. Cable diameter for the connection to the push-in terminal: max. 7 mm

IMPORTANT!

For double-insulated cables with a cable diameter over 7 mm, the outer layer of insulation must be removed to connect to the push-in terminal.

NOTE!

The national regulations of the grid operator or other factors may require a residual current circuit breaker in the AC connection lead.

For this situation, a type A residual current circuit breaker is generally adequate. Nevertheless, false alarms can be triggered for the type A residualcurrent circuit breaker in individual cases and depending on local conditions. For this reason, in accordance with national legislation, Fronius recommends that a residual-current circuit breaker with a tripping current of at least 100 mA suitable for frequency converters be used.

IMPORTANT!

The inverter can be fused with max. an automatic circuit breaker C 63 A.

Recom-

PhasesAC out-

Inverter

Fronius Primo GEN24 3.0 kW 1 3 000 W C 63 A C 32 A

put

Maximum

fuse rating

mended

fuse rating

Recom-

PhasesAC out-

Inverter

Fronius Primo GEN24 3.6 kW 1 3 680 W C 63 A C 32 A

put

Maximum

fuse rating

mended

fuse rating

Fronius Primo GEN24 4.0 kW

Fronius Primo GEN24 4.6 kW 1 4 600 W C 63 A C 40 A

Fronius Primo GEN24 5.0 kW

Fronius Primo GEN24 6.0 kW

1 4 000 W C 63 A C 40 A

1 5 000 W C 63 A C 40 A

1 6 000 W C 63 A C 40 A

Connecting the inverter to the public grid (AC side)

Safety

WARNING!

Danger due to incorrect operation and incorrectly performed work.

This can result in serious injury and damage to property.

Read the Installation and Operating Instructions before installing and com-

▶

missioning the equipment. Only qualified personnel are authorised to commission your inverter and only

▶

within the scope of the respective technical regulations.

WARNING!

Danger due to grid voltage and DC voltage from solar modules that are exposed to light.

An electric shock can be fatal.

Prior to any connection work, disconnect the inverter on the AC side and the

▶

DC side. Only an authorised electrical engineer is permitted to connect this equip-

▶

ment to the public grid.

Connecting the inverter to the public grid (AC side)

WARNING!

Danger due to damaged and/or contaminated terminals.

This can result in serious injury and damage to property.

Before making any connections, check the terminals for damage and con-

▶

tamination. Remove contamination in the de-energized state.

▶

Have defective terminals repaired by an authorised specialist.

▶

IMPORTANT!

National standards and guidelines regarding load unbalance must be taken into account. The inverter does not have a communication link and does not automatically disconnect from the grid when the load unbalance is exceeded.

If the inverter is installed in Australia or New Zealand (required standard: AS/ NZS4777.2:2020), the inverter must not be used as part of a three-phase combination, as there is no communication link between the inverters.

NOTE!

The neutral conductor must be connected in order to operate the inverter.

It is not possible to operate the inverter in unearthed grids, such as IT grids (insulated grids without ground conductor).

Make sure that the grid's neutral conductor is grounded.

▶

IMPORTANT! The ground conductor of the AC cable must be laid in such a way that it is the last to be disconnected in the event that the strain-relief device should fail. This can be ensured by making it somewhat longer and by laying it in a loop.

Turn off the automatic circuit breaker.

Make sure that the DC disconnector is in the "Off" switch setting. Loosen the five screws of the connection area cover by rotating them 180° to the left using a screwdriver (TX20). Remove the connection area cover from the device.

Guide the mains cable from below through the strain-relief device on the right side. Remove the AC terminal.

IMPORTANT!

The ground conductor must be connected with a loop so that if the strainrelief device fails, the ground conductor is disconnected last. For more information on the strain-relief device, see chapter Cross section

of the AC cable on page 66.

Strip the insulation of the single conductors by 12 mm. Select the cable cross section in accordance with the instructions in Per-

missible cables for the electrical connection from page 65.

Lift to open the terminal's operating lever and insert the stripped single conductor into the slot provided as far as it will go. Then close the terminal's operating lever until it engages.

NOTE!

Only one conductor may be connected to each pin.

The AC cables can be connected to the AC terminals without ferrules.

L1 Phase conductor N Neutral conductor PE Ground conductor

Insert the AC terminal into the AC slot until it engages. Fasten the cap nut of the strain-relief device with a torque of 6 ‑ 7 Nm.

Connecting solar module strings to the inverter

General comments regarding PV modules

To enable suitable PV modules to be chosen and to use the inverter as efficiently as possible, it is important to bear the following points in mind:

If insolation is constant and the temperature is falling, the open-circuit

voltage of the PV modules will increase. The open-circuit voltage must not exceed the maximum permissible system voltage. If the open-circuit voltage exceeds the specified values, the inverter will be destroyed and all warranty claims will be forfeited. The temperature coefficients on the data sheet of the PV modules must be

observed. Exact values for sizing the PV modules can be obtained using suitable calcu-

lation tools, such as the Fronius Solar.creator.

IMPORTANT!

Before connecting up the PV modules, check that the voltage for the PV modules specified by the manufacturer corresponds to the actual measured voltage.

IMPORTANT!

The PV modules connected to the inverter must comply with the IEC 61730 Class A standard.

IMPORTANT!

Solar module strings must not be earthed.

Safety

WARNING!

Danger due to incorrect operation and incorrectly performed work.

This can result in serious injury and damage to property.

Commissioning as well as maintenance and service work in the power module

▶

of the inverter must only be carried out by service personnel trained by Fronius and only within the scope of the respective technical regulations. Read the Installation and Operating Instructions before installing and com-

▶

missioning the equipment.

WARNING!

Danger due to grid voltage and DC voltage from solar modules that are exposed to light.

This can result in serious injury and damage to property.

Ensure that the AC and DC side of the inverter are de-energised before car-

▶

rying out any connection, maintenance or service tasks. Only an authorised electrical engineer is permitted to connect this equip-

▶

ment to the public grid.

WARNING!

Module array general information

Module array configuration 3 ‑ 6 kW

Danger due to damaged and/or contaminated terminals.

This can result in serious injury and damage to property.

Before making any connections, check the terminals for damage and con-

▶

tamination. Remove contamination in the de-energized state.

▶

Have defective terminals repaired by an authorised specialist.

▶

2 independent PV inputs (PV 1 and PV 2) are available. These can be connected to a different number of modules.

When using for the first time, set up the module array according to the respective configuration (also possible later in the “System configuration” menu under the “Components” menu item).

IMPORTANT!

The installation must be carried out in accordance with the nationally applicable standards and directives. If the Arc Fault Circuit Interrupter integrated in the inverter is used for the requirement according to IEC 63027 for arc detection, the solar module strings must not be combined upstream of the inverter.

Current equal to or less than 22 A (I

Combined solar module strings with total current greater than 22 A (l

dcmax

Module array settings:

PV 1: ON PV 2: OFF

Module array settings:

PV 1: ON PV 2: OFF PV 1 + PV 2 (connected in parallel):

IMPORTANT!

The maximum current load of a single terminal is 22 A. PV‑connection strings with a total current of more than 22 A must be split between both PV inputs upstream of the terminals (I

≤ 55 A). The plug connection for splitting the total current must be sufficiently dimensioned, suitable and correctly installed. Splitting the current by bridging from PV 1 to PV 2 at the terminal is not permitted.

SC max

Module array settings:

+ -

PV 1: ON PV 2: ON

Connecting the solar module strings to the inverter

PV 1 less than or equal to 36 A (I PV 2 less than or equal to 19 A (I

SC PV1

SC PV2

)

Push the DC cables through the DC bushings by hand.

IMPORTANT!

Before stripping the insulation, push the cables through the DC bushings to prevent individual wires being bent or broken.

+ -

PV1+PV1+PV2+PV2+BAT

PV1

PV2

BAT

Select the cable cross section in accordance with the instructions in Per-

missible cables for the electrical connection from page 65.

Strip the insulation of the single conductors by 12 mm. Lift to open the terminal's operating lever and insert the stripped single conductor into the slot provided, in each case as far as it will go. Then close the operating lever until it engages.

WARNING!

Danger due to individual conductors in the terminal that are loose and/or improperly connected.

This can result in serious injury and damage to property.

Only connect one single conductor

▶

in the slot provided for each terminal. Check that the single conductor is

▶

held securely in the terminal. Ensure that all of the single con-

▶

ductor is within the terminal and that no individual wires are sticking out of the terminal.

+ / -

Use a suitable measuring instrument to check the voltage and polarity of the DC cabling. Remove both DC terminals from the slots.

CAUTION!

Danger due to polarity reversal at the terminals.

This may result in severe damage to the inverter.

Use a suitable measuring instru-

▶

ment to check the polarity of the DC cabling. Use a suitable measuring instru-

▶

ment to check the voltage (max. 600 VDC)

Insert the DC terminals into the respective slot until they engage. Fasten the screws of the cable guide to the housing using a screwdriver (TX20) and a torque of 1.3-1.5 Nm.

NOTE!

Risk due to overtorque on the strain relief.

This may result in damage to the strain-relief device.

Do not use a drill driver.

▶

Connecting the battery to the inverter

Safety

WARNING!

Danger due to incorrect operation and incorrectly performed work.

This can result in serious injury and damage to property.

Commissioning as well as maintenance and service work on the inverter and

▶

battery must only be carried out by service personnel trained by the respective inverter or battery manufacturer and only within the scope of the respective technical regulations. Read the Installation and Operating Instructions provided by the respective

▶

manufacturer before installing and commissioning the equipment.

WARNING!

Danger due to grid voltage and DC voltage from solar modules that are exposed to light and from batteries.

This can result in serious injury and damage to property.

Ensure that the AC and DC side of the inverter and the battery are de-ener-

▶

gised before carrying out any connection, maintenance or service tasks. Only an authorised electrical engineer is permitted to connect this equip-

▶

ment to the public grid.

WARNING!

Connecting the battery on the DC side

Danger due to damaged and/or contaminated terminals.

This can result in serious injury and damage to property.

Before making any connections, check the terminals for damage and con-

▶

tamination. Remove contamination in the de-energized state.

▶

Have defective terminals repaired by an authorised specialist.

▶

CAUTION!

Danger due to operation of the battery above the permissible altitude as specified by the manufacturer.

Operating the battery above the permissible altitude can result in restricted operation, failure of the operation, and unsafe states of the battery.

Adhere to the manufacturer's instructions regarding the permissible altitude.

▶

Operate the battery only at the altitude specified by the manufacturer.

▶

IMPORTANT!

Prior to installing a battery, ensure that the battery is switched off. The max. DC cable length for the installation of external batteries must be taken into account according to the manufacturer's specifications, see chapter Suitable batteries on page 26.

BAT PE

BAT+ BAT-

Manually push the battery cables through the DC bushings.

* The battery ground conductor must be connected externally (e.g. switch cabinet). When connecting an LG RESU FLEX battery, the battery ground conductor can be connected in the inverter (see chapter Connecting

the LG RESU FLEX ground conductor

on page 82. Observe the minimum cross section of the ground conductor to the battery.

IMPORTANT!

Before stripping the insulation, push the cables through the DC bushings to prevent individual wires being bent or broken.

PUSH

BAT+ BAT-

Select the cable cross section in accordance with the instructions in Per-

missible cables for the electrical connection from page 65.

WARNING!

Danger due to individual conductors in the terminal that are loose and/or improperly connected.

This can result in serious injury and damage to property.

Only connect one single conductor

▶

in the slot provided for each terminal. Check that the single conductor is

▶

held securely in the terminal. Ensure that all of the single con-

▶

ductor is within the terminal and that no individual wire strands are sticking out of the terminal.

PV1+PV1+PV2+PV2+BAT

PV1

PV2

BAT

BAT+ BAT-

+ / -

BAT+ BAT-

"click"

BAT+ BAT-

CAUTION!

Risk due to overvoltage when using

other slots on the terminal.

This may result in damage to the battery and/or the PV modules due to discharge.

Only use the slots marked BAT for

▶

battery connection.

CAUTION!

Danger due to polarity reversal at the terminals.

Serious substantive damage to the PV system may result.

Use a suitable measuring instru-

▶

ment to check the polarity of the DC cabling when the battery is switched on. The maximum voltage for the bat-

▶

tery input must not be exceeded (see Technical data on page 166).

Insert the DC terminals into the respective slot until they engage.

TX 20

1,3 - 1,5 Nm

BAT+ BAT-

Fasten the screws of the cable guide to the housing using a screwdriver (TX20) and a torque of 1.3-1.5 Nm.

NOTE!

Risk due to overtorque on the strain relief.

This may result in damage to the strain-relief device.

Do not use a drill driver.

▶

IMPORTANT!

Information for connection on the battery side can be found in the Installation Instructions from the relevant manufacturer.

Connecting the LG RESU FLEX ground conductor

Route the battery ground conductor in the integrated cable duct of the connection area divider into the AC connection area.

Fasten the battery ground conductor to the second input of the ground electrode terminal from above using a screwdriver (TX20) and a torque of

1.8-2 Nm.

IMPORTANT!

Information for connection on the battery side can be found in the Installation Instructions from the relevant manufacturer.

Connecting backup power - PV Point (OP)

Safety

WARNING!

Danger from incorrect installation, commissioning, operation or incorrect use.

This can result in serious injury and damage to property.

Only trained and qualified personnel are authorised to install and commis-

▶

sion the system, and only within the scope of the technical regulations. The Installation and Operating Instructions must be read carefully prior to

▶

use. If anything is unclear, contact your vendor immediately.

▶

WARNING!

Danger due to damaged and/or contaminated terminals.

This can result in serious injury and damage to property.

Before making any connections, check the terminals for damage and con-

▶

tamination. Remove contamination in the de-energized state.

▶

Have defective terminals repaired by an authorised specialist.

▶

NOTE!

The continuous supply via the PV Point depends on the available PV power.

If the solar modules are not supplying enough power, interruptions may occur.

Do not connect any loads that require an interruption-free supply.

▶

Installation

IMPORTANT!

The valid national laws, standards and provisions, as well as the specifications of the relevant grid operator are to be taken into account and applied. It is highly recommended that the specific installation be agreed with the grid operator and explicitly approved by this operator. This obligation applies to system constructors in particular (e.g. installers).

NOTE!

All loads that have to be supplied via the OP terminal must be protected by means of a residual-current circuit breaker.

In order to ensure the residual-current circuit breaker operates properly, a connection must be established between the neutral conductor N´ (OP) and earth.

For the Circuit Diagram recommended by Fronius, see Circuit Diagram - PV

Point (OP) on page 191.

Switch off the automatic circuit breaker and DC disconnector.

CAUTION!

Danger from faulty or incorrect holes.

This may lead to injuries to the eyes and hands as a result of ﬂying debris and sharp edges, as well as damage to the inverter.

When drilling, wear suitable protective goggles.

▶

Only use a step drill when drilling.

▶

Ensure that nothing is damaged inside the device (for example connection

▶

block). Adapt the diameter of the hole to match the corresponding connection.

▶

Deburr the holes using a suitable tool.

▶

Remove the drilling residues from the inverter.

▶

Drill out the optional cable guide with a step drill.

Insert the strain-relief device into the hole and secure to the torque specified by the manufacturer.

Guide the mains cable through the strain-relief device from below. Remove the OP terminal.

Strip the insulation of the single conductors by 12 mm. The cable cross section must be

between 1.5 mm2 and 10 mm2. Lift to open the terminal's operating lever and insert the stripped single conductor into the slot provided, all the way up to the stop. Then close the operating lever until it engages.

NOTE!

Only one conductor may be connected to each pin. The conductors can be connected without ferrules.

L1´ Phase conductor N´ Neutral conductor N´ PEN conductor

NOTE!

The PEN conductor must be produced with ends that are permanently marked blue, according to the national provisions, and have a cross section of 10 mm².

Fasten the ground conductor and PEN conductor to the ground electrode terminal using a screwdriver (TX20) and a torque of 1.8-2 Nm.

Insert the OP terminal into the OP slot until it engages. Tighten the cap nut of the strain-relief device to the torque

specified by the manufacturer.

Connecting backup power - Full Backup

Safety

WARNING!

Danger from incorrect installation, commissioning, operation or incorrect use.

This can result in severe personal injury/damage to property.

Only trained and qualified personnel are authorised to install and commis-

▶

sion the system, and only within the scope of the technical regulations. The Installation and Operating Instructions must be read carefully prior to

▶

use. If anything is unclear, contact your vendor immediately.

▶

IMPORTANT!

The valid national laws, standards and provisions, as well as the specifications of the relevant grid operator are to be taken into account and applied. It is highly recommended to coordinate the concrete examples implemented and in particular the specific installation with the grid operator to obtain their explicit approval. This obligation applies to system constructors in particular (e.g. installers). The examples suggested here show a backup power supply with or without an external protection relay (external grid and system protection unit). Whether an external protection relay must be used or not is the decision of the respective grid operator.

IMPORTANT!

An uninterruptible power supply (UPS) may only be used to supply individual loads (e.g. computers). Feeding into the power supply of the house network is not permitted. The Installation and Operating Instructions must be read carefully prior to use. If anything is unclear, contact your vendor immediately.

Cabling variants including backup power circuits with 1-pin separation e.g. Austria or Australia

The examples given in this document (in particular cabling variants and Circuit Diagrams) are suggestions only. These examples have been carefully developed and tested. They can therefore be used as a basis for real-life installation. Anyone following or using these examples does so at their own risk.

Circuit Diagram

The Circuit Diagram for the 1-pin double separation - e.g. Austria, can be found in the appendix to this document on page 197. The Circuit Diagram for the 1-pin single separation - e.g. Australia, can be found in the appendix to this document on page 198.

Cabling of backup power circuit and non-backup power circuits

If not all the loads in the home need to be supplied in a backup power situation, the circuits need to be divided into backup power circuits and non-backup power circuits. The total load of the backup power circuits must not exceed the rated power of the inverter.

The backup power circuits and non-backup power circuits must be fused separately according to the required safety measures (residual current circuit breaker, automatic circuit breaker, etc.). In backup power mode, only the backup power circuits are disconnected from the grid by contactors K1 and K2, 1-pin. The rest of the home network is not supplied with power in this case.

The following points regarding cabling must be considered:

The main contacts of contactors K1 and K2 must be installed between the

Fronius Smart Meter and the inverter and the residual current circuit breaker of the backup power circuits. The supply voltage for contactors K1 and K2 is provided by the public grid

and must be connected to phase 1 (L1) downstream of the Fronius Smart Meter and fused accordingly. An NC contact for relay K3 interrupts the supply voltage to contactors K1

and K2. This prevents the backup power network of the inverter from being switched to the public grid. The NO contact of relay K3 gives feedback to the inverter on whether the

locking was successfully performed by relay K3. Additional inverters or other AC sources can be installed in the backup

power circuit downstream of the main contacts of K1 and K2. The sources are not synchronised to the network of the inverter because this backup power network has a frequency of 53 Hz. The use of contactor K2 is optional in Australia.

All-pin separation cabling variant e.g. Germany, France, Spain

Circuit Diagram

The Circuit Diagram for the 2-pin double separation - e.g. Germany, can be found in the appendix to this document on page 199. The Circuit Diagram for the 2-pin single separation - e.g. France and Spain, can be found in the appendix to this document on page 200.

Cabling of backup power circuit and non-backup power circuits:

The backup power circuits and non-backup power circuits must be fused separately according to the required safety measures (residual current circuit breaker, automatic circuit breaker, etc.). In backup power mode, only the backup power circuits are disconnected at all pins from the grid by contactors K1 and K2; an earth connection is only established for these circuits. The rest of the home network is not supplied with power in this case.

The following points regarding cabling must be considered:

The main contacts of contactors K1 and K2 must be installed between the

Fronius Smart Meter and the residual-current circuit breaker of the inverter and the residual-current circuit breaker of the backup power circuits. The supply voltage for contactors K1 and K2 is provided by the public grid

and must be connected to phase 1 (L1) downstream of the Fronius Smart Meter and fused accordingly. To ensure residual-current circuit breakers function in backup power mode,

the connection between the neutral conductor and the ground conductor must be established as close as possible to the inverter, but in any case upstream of the first residual-current circuit breaker. An NC contact is used for this purpose for each of the main contacts of contactors K4 and K5. This ensures that the ground connection is established as soon as the public grid connection is no longer available. As with contactor K1, the supply voltage for contactors K4 and K5 is

provided via phase 1 (L1) of the public grid. An NC contact for relay K3 interrupts the supply voltage to contactors K1,

K2, K4 and K5. This prevents the ground connection from being immediately disconnected again when power returns to the public grid and the backup power network of the inverter from being switched to the public grid. The NO contact of relay K3 gives feedback to the inverter on whether the

locking was successfully performed by relay K3. The use of contactor K2 is optional in France and Spain.

Additional inverters or other AC sources can be installed in the backup

power circuit downstream of the main contacts of K1 and K2. The sources are not synchronised to the network of the inverter because this backup power network has a frequency of 53 Hz.

All-pin separation cabling variant, e.g. UK

Circuit Diagram

The Circuit Diagram for 2-pin double separation, e.g. UK, can be found in the appendix to this document on page 201.

Cabling of backup power circuit and non-backup power circuits

The backup power circuits and non-backup power circuits must be fused separately according to the required safety measures (residual current circuit breaker, automatic circuit breaker, etc.). In backup power mode, only the backup power circuits are disconnected at all pins from the grid by contactors K1 and K2; an earth connection is only established for these circuits. The rest of the home network is not supplied with power in this case.

The following points regarding cabling must be considered:

The main contacts of contactors K1 and K2 must be installed between the

and must be connected to phase 1 (L1) downstream of the Fronius Smart Meter and fused accordingly. To ensure residual-current circuit breakers function in backup power mode,

provided via phase 1 (L1) of the public grid. An NC contact for relay K3 interrupts the supply voltage to contactors K1,

locking was successfully performed by relay K3. Additional inverters or other AC sources can be installed in the backup

Smart Meter 50kA-3 or Fronius Smart Meter TS 5kA-3).

All-pin separation cabling variant, e.g. Italy

Circuit Diagram

The Circuit Diagram for 2-pin double separation with ext. grid and system protection, e.g. Italy, can be found on page 202 in the appendix of this document.

Backup power circuit and non-backup power circuits

IMPORTANT!

Fronius Smart Meter US-240 must be used for these circuit variants.

The backup power circuits and non-backup power circuits must be fused separately according to the required safety measures (residual-current circuit breaker, automatic circuit breaker, etc.). In backup power mode, only the backup power circuits are disconnected from the grid by contactors K1 and K2; an earth connection is only established for these circuits. The rest of the home network is not supplied with power in this case.

The following points regarding cabling must be considered:

The main contacts of contactors K1 and K2 must be installed between the

and must be connected to phase 1 (L1) downstream of the Fronius Smart Meter and fused accordingly. Actuation of contactors K1 and K2 is carried out by the external grid and sys-

tem protection unit. The external grid and system protection unit must be installed downstream

of the Fronius Smart Meter. Precise installation and wiring instructions for the external grid and system protection unit can be found in its separate Operating Instructions. The remote trip input of the external grid and system protection unit must

be set to NC according to the manufacturer's Operating Instructions. To ensure residual-current circuit breakers function in backup power mode,

the connection between the neutral conductor and the ground conductor must be established as close as possible to the inverter, but in any case upstream of the first residual-current circuit breaker. An NC contact is used for this purpose for the main contacts of contactors K4 and K5. This ensures that the ground connection is established as soon as the public grid connection is no longer available. The supply voltage for contactors K1, K2, K4 and K5 is provided via phase 1

(L1) of the public grid and is switched via the external grid and system protection unit. An NC contact for relay K3, which activates the remote input of the external

grid and system protection unit, interrupts the supply voltage to contactors K1, K2, K4 and K5. This prevents the ground connection from being immediately disconnected again when power returns to the public grid and the backup power network of the inverter from being switched to the public grid. The NO contact of relay K3 gives additional feedback to the inverter on

whether the locking was successfully performed by relay K3. Additional inverters or other AC sources can be installed in the backup

power circuit downstream of the main contacts of K1 and K2. The sources are not synchronised to the network of the inverter because this backup power network has a frequency of 53 Hz.

Testing backup power mode

After the initial installation and configuration of the backup power operation, it is recommended to test the backup power operation. For test mode, a battery charge of min. 30 % is recommended.

A description on how to run test mode can be found in the backup power check-

list (https://www.fronius.com/en/search-page, item number: 42,0426,0365).

Connecting the data communication cable

Modbus participants

The inputs M0 and M1 can be selected for this purpose. A maximum of 4 Modbus participants can be connected to the Modbus terminal on inputs M0 and M1.

IMPORTANT!

Only one primary meter, one battery and one Ohmpilot can be connected per inverter. Due to the high data transfer of the battery, the battery occupies 2 participants. If the "Inverter control via Modbus" function is activated in the "Com-

munication” → "Modbus" menu, no Modbus participants are possible. It is not

possible to send and receive data at the same time.

Example 1:

Input Battery

Modbus 0 (M0)

Fronius

Ohmpilot

Quantity

Primary

meter

0 4

0 2

0 1

Quantity

Secondary

meter

Modbus 1 (M1)

Example 2:

Input Battery

Modbus 0 (M0)

Modbus 1 (M1)

Fronius

Ohmpilot

1 3

Quantity

Primary

meter

1 3

0 4

0 2

0 1

Quantity

Secondary

meter

Routing data communication cables

IMPORTANT!

If data communication cables are wired into the inverter, observe the following points:

Depending on the number and cross section of the wired data communica-

tion cables, remove the corresponding blanking plugs from the sealing insert and insert the data communication cables. Make sure that you insert the corresponding blanking plugs into any free

openings on the sealing insert.

IMPORTANT!

Should the blanking plugs be missing or improperly fitted, then safety class IP66 cannot be guaranteed.

Undo the strain-relief device cap nut and push out the sealing ring and the blanking plug from the inside of the device.

Open up the sealing ring at the location where the blanking plug is to be removed.

* Liberate the blanking plug by moving it sideways.

Guide the data cables first through the strain-relief device cap nut and then through the housing opening.

Insert the sealing ring between the cap nut and the housing opening. Press the data cables into the seal's cable guide. Then press in the seal until it reaches the underside of the strain-relief device.

Fasten the cap nut of the strain-relief device with a torque of min. 2.5 - max. 4 Nm.

Connecting the battery communication cable

Strip 10 mm from the single conductors and mount the ferrules if necessary.

IMPORTANT!

Connect the individual conductors to an appropriate ferrule if several individual conductors are connected to one input of the push-in terminals.

Terminating resistors

Insert the cable into the respective slot and check the cable is securely retained.

IMPORTANT!

Use only twisted pairs for connecting "Data +/-" and "Enable +/-", see section

Permitted cables for the data communication connection on page 66.

Twist the cable shield and insert into the "SHIELD" slot.

IMPORTANT!

Improperly fitted shielding can cause data communication problems.

For the wiring proposal recommended by Fronius, see page 193.

It may be possible for the system to function without terminating resistors. However, owing to interference, the use of terminating resistors according to the following overview is recommended for trouble-free functioning.

For permissible cable and max. distances for the data communication range see chapter Permitted cables for the data communication connection on page 66.

IMPORTANT!

Terminating resistors that are not positioned as illustrated can result in interference in the data communication.

Manufacturer manualManufacturer manual

OPTION 1

0 1

Modbus 1

0 1

Modbus 0

Modbus 0 / 1

(min. CAT 5)

Modbus 0 / 1

(min. CAT 5)

Manufacturer manual

OPTION 2

M0 / M1

0 1

Manufacturer manual

Modbus 0 / 1

(min. CAT 5)

Modbus 0 / 1

(min. CAT 5)

Manufacturer manual

OPTION 3

M0 / M1

0 1

Manufacturer manual

Modbus 0 / 1

(min. CAT 5)

Modbus 0 / 1

(min. CAT 5)

Installing the

IN (+)

IN (-)

OUT (+)

OUT (-)

IN (+)

IN (-)

OUT (+)

OUT (-)

IN (+) IN (-)

OUT (+)

OUT (-)

CAT 5/6/7

WSD (wired shutdown)

IMPORTANT!

The push-in WSD terminal in the inverter's connection area is delivered with a bypass ex works as standard. The bypass must be removed when installing a trigger device or a WSD chain.

The WSD switch of the first inverter with connected trigger device in the WSD chain must be in position 1 (primary device). The WSD switch of all other inverters should be in the 0 (secondary device) position.

Max. distance between 2 devices: 100 m Max. number of devices: 28

* Floating contact of the trigger device (e.g. central grid and system protection). If several ﬂoating contacts are used in a WSD chain, they must be connected in series.

Closing and commissioning the inverter

Closing the inverter's connection area/housing cover, and commissioning

NOTE!

The housing cover is fitted with a lock for safety reasons, which allows the housing cover on the inverter to be pivoted only when the DC disconnector is switched off.

Only clip and pivot the housing cover onto the inverter when the DC discon-

▶

nector is switched off. Do not use excessive force to clip in and pivot the housing cover.

▶

Place the cover on the connection area. Tighten the five screws by rotating them 180° to the right in the indicated order using a screwdriver (TX20).

Starting the inverter for the first time

When starting the inverter for the first time, various setup settings must be configured.

If the setup process is cancelled before the process is complete, any data that has been input up to this point is lost and the start screen with the installation wizard is shown again. If the process is interrupted, such as in the event of a power outage, the data is saved. Commissioning may be continued from the point at which the process was interrupted once the power supply has been restored. If the setup was interrupted, the inverter feeds energy into the grid at maximum 500 W and the operating status LED ﬂashes yellow.

Clip the housing cover in at the top of the inverter. Press on the lower part of the housing cover and tighten the two screws 180° to the right using a Torx screwdriver (TX20). Turn the DC disconnector to the "On" switch position. Switch on the automatic circuit breaker. For systems with a battery, observe the switch-on sequence as per chapter Suitable batter-

ies on page 26.

IMPORTANT! Open WLAN Access

Point with the optical sensor, see chapter Button functions and LED

status indicator on page 35

The country setup can only be set when starting the inverter for the first time. If

1 2

open access point

Setup your PV system in a few minutes.

START INSTALLATION

Log in with your Fronius credentials (email adress & password) in order to get the most out of the PV System. Installing a new product does not require a Login.

Imprint & Contact Terms & ConditionsData Privacy

Fronius Solar.start

open access point

FRONIUS_PILOTxxx

Secured

Password:

12345678

192.168.250.181

the country setup needs to be changed at a later date, please contact your installer / Technical Support team.

Installation with the app

The "Fronius Solar.start" app is required for this installation method. Depending on the end device with which the installation will be carried out, download the app for the respective platform.

Start the installation in the app.

Select the product to which the connection should be established.

Open the access point by touching the sensor once → Communication LED: ﬂashes blue.

Follow and complete the installation wizard in the individual sections.

Add system components in Solar.web and start up the PV system.

Installation using the web browser

100

The network wizard and the product setup can be carried out independently of each other. A network connection is required for the Solar.web installation wizard.

WLAN:

Open the access point by touching the sensor once → Communication LED: ﬂashes blue.

Establish the connection to the inverter in the network settings (the inverter

is displayed with the name "FRONIUS_PILOT" and the serial number of the device).

Password: enter 12345678 and confirm.

IMPORTANT!

To enter the password on a Windows 10 operating system, the link "Connect using a security key instead" must first be activated to establish a connection with the password: 12345678.

Fronius Fronius Primo GEN24 3 - 6 kW Plus Operating Instruction [EN]

Specifications and Main Features

Frequently Asked Questions

User Manual