Voltronic Power 10KW User Manual

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Hybrid 10KW PV Inverter

Version: 1.2

User Manual

Table Of Contents

1. Introduction .......................................................................................... 1

2. Important Safety Warning...................................................................... 2

3. Unpacking & Overview .......................................................................... 4

3-1. Packing List ................................................................................... 4

3-2. Product Overview .......................................................................... 4

4. Installation ........................................................................................... 5

4-1. Selecting Mounting Location........................................................... 5

4-2. Mounting Unit ............................................................................... 5

5. Grid (Utility) Connection ........................................................................ 7

5-1. Preparation ................................................................................... 7

5-2. Connecting to the AC Utility ........................................................... 7

6. PV Module (DC) Connection ................................................................... 9

7. Battery Connection ............................................................................... 13

8. Load (AC Output) Connection ............................................................... 14

8-1. Preparation .................................................................................. 14

8-2. Connecting to the AC output ......................................................... 14

9. Communication .................................................................................... 16

10. Dry Contact Signal ............................................................................... 17

10-1. Electric Parameter ...................................................................... 17

10-2. Function Description ................................................................... 17

11. Relay Control Port ................................................................................ 19

11-1. Interface Configuration ............................................................... 19

11-2. Function Description ................................................................... 19

11-3. Application ................................................................................. 20

12. Application with Energy Meter ............................................................... 21

13. Commissioning ..................................................................................... 22

14. Initial Setup ......................................................................................... 23

15. Operation ............................................................................................ 35

15-1. Interface .................................................................................... 35

15-2. LCD Information Define .............................................................. 35

15-3. Button Definition ........................................................................ 36

15-4. Query Menu Operation ................................................................ 37

15-5. Operation Mode & Display ........................................................... 40

16. Charging Management ......................................................................... 44

17. Maintenance & Cleaning ....................................................................... 46

18. Trouble Shooting .................................................................................. 47

18-1. Warning List ............................................................................... 47

18-2. Fault Reference Codes ................................................................ 48

19. Specifications ....................................................................................... 50

1. Introduction

This hybrid PV inverter can provide power to connected loads by utilizing PV power, utility power and battery power.

Figure 1 Basic hybrid PV System Overview

Depending on different power situations, this hybrid inverter is designed to generate continuous power from PV solar modules (solar panels), battery, and the utility. When MPP input voltage of PV modules is within acceptable range (see specification for the details), this inverter is able to generate power to feed the grid (utility) and charge battery. This inverter is only compatible with PV module types of single crystalline and poly crystalline. Do not connect any PV array types other than these two types of PV modules to the inverter. Do not connect the positive or negative terminal of the solar panel to the ground. See Figure 1 for a simple diagram of a typical solar system with this hybrid inverter.

Note: By following the EEG standard, every inverter sold to German area is not allowed to charge battery from Utility. The relevant function is automatically disabled by the software.

PV module

Battery

Hybrid inverter

Distribution Box

Electric grids

Load

2. Important Safety Warning

Before using the inverter, please read all instructions and cautionary markings on the unit and this manual. Store the manual where it can be accessed easily.

This manual is for qualified personnel. The tasks described in this manual may be performed by qualified personnel only.

General Precaution-

WARNING! Before installing and using this inverter, read all instructions and cautionary

markings on the inverter and all appropriate sections of this guide.

WARNING! Normally grounded conductors may be ungrounded and energized when a ground fault is indicated.

WARNING! This inverter is heavy. It should be lifted by at least two persons.

CAUTION! Authorized service personnel should reduce the risk of electrical shock by

disconnecting AC, DC and battery power from the inverter before attempting any maintenance or cleaning or working on any circuits connected to the inverter. Turning off controls will not reduce this risk. Internal capacitors can remain charged for 5 minutes after disconnecting all sources of power.

CAUTION! Do not disassemble this inverter yourself. It contains no user-serviceable parts. Attempt to service this inverter yourself may cause a risk of electrical shock or fire and will void the warranty from the manufacturer.

CAUTION! To avoid a risk of fire and electric shock, make sure that existing wiring is in good condition and that the wire is not undersized. Do not operate the Inverter with damaged or substandard wiring.

Conventions used: WARNING! Warnings identify conditions or practices that could result in personal

injury; CAUTION! Caution identify conditions or practices that could result in damaged to the unit or other equipment connected.

CAUTION! Under high temperature environment, the cover of this inverter could be hot enough to cause skin burns if accidentally touched. Ensure that this inverter is away from normal traffic areas.

CAUTION! Use only recommended accessories from installer. Otherwise, not-qualified tools may cause a risk of fire, electric shock, or injury to persons.

CAUTION! To reduce risk of fire hazard, do not cover or obstruct the cooling fan.

CAUTION! Do not operate the Inverter if it has received a sharp blow, been dropped, or

otherwise damaged in any way. If the Inverter is damaged, please call for an RMA (Return Material Authorization).

CAUTION! AC breaker, DC switch and Battery circuit breaker are used as disconnect devices and these disconnect devices shall be easily accessible.

Symbols used in Equipment Markings

Refer to the operating instructions Caution! Risk of danger

Caution! Risk of electric shock

Caution! Risk of electric shock. Energy storage timed

discharge for 5 minutes.

Caution! Hot surface

Before working on this circuit

- Isolate inverter/Uninterruptible Power System (UPS)

- Then check for Hazardous Voltage between all

terminals including the protective earth.

Risk of Voltage Backfeed

3. Unpacking & Overview

3-1. Packing List

Before installation, please inspect the unit. Be sure that nothing inside the package is damaged. You should have received the following items inside of package:

Inverter unit PV connectors AC connector Mounting plate Fixing screws

Software CD Manual USB cable RS-232 cable Relay control port

3-2. Product Overview

1) PV connectors

2) AC Grid connectors

3) Battery connectors

4) AC output connectors (Load

connection)

5) RS-232 communication port

6) USB communication port

7) Intelligent slot

8) Grounding

9) LCD display panel (Please check

section 10 for detailed LCD operation)

10) Operation buttons

11) Dry contact

12) Battery thermal sensor

13) EPO

14) AC circuit breaker

15) DC Switch

16) Relay control port

4. Installation

4-1. Selecting Mounting Location

Consider the following points before selecting where to install:

 Do not mount the inverter on flammable construction materials.  Mount on a solid surface  This inverter can make noises during operation which may be perceived as a

nuisance in a living area.

 Install this inverter at eye level in order to allow the LCD display to be read at all

times.

 For proper air circulation to dissipate heat, allow a clearance of approx. 20 cm to

the side and approx. 50 cm above and below the unit.

 Dusty conditions on the unit may impair the performance of this inverter.  The ambient temperature should be between 0°C and 40°C and relative humidity

should be between 5% and 85% to ensure optimal operation.

 The recommended installation position is to be adhered to vertical.  For proper operation of this inverter, please use appropriate cables for grid

connection.

 The pollution degree of the inverter is PD2. Select an appropriate mounting

location. Install the solar inverter in a protected area that is dry, free of excessive dust and has adequate air flow. Do NOT operate it where the temperature and humidity is beyond the specific limits. (Please check the specs for the limitations.)

 Installation position shall not prevent access to the disconnection means.  This inverter is designed with IP20 for indoor applications only.  Regularly clean the fan filter.

4-2. Mounting Unit

Installation to the wall should be implemented with the proper screws. After that, the device should be bolted on securely.

The inverter only can be used in a CLOSED ELECTRICAL OPERATING AREA. Only service person can enter into this area.

WARNING!! Remember that this inverter is heavy! Please be carefully when lifting out from the package.

WARNING!! FIRE HAZARD. SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE ONLY.

1. Drill six holes in the marked

locations with supplied six screws. The reference tightening torque is 35 N.m.

2. Raise the inverter and place it over

the mounting plate.

3. Fix the inverter in position by

screwing the supplied two screws (M4*12) located on the top two sides of the inverter.

4. Check if the inverter is firmly secured.

5. Grid (Utility) Connection

5-1. Preparation NOTE: The overvoltage category of the AC input is III. It should be connected to the

power distribution. NOTE2: The inverter is built in a 63A/400V breaker to protect the inverter from AC power damage.

WARNING! It's very important for system safety and efficient operation to use appropriate cable for grid (utility) connection. To reduce risk of injury, please use the proper recommended cable size as below. Suggested cable requirement for AC wire

Nominal Grid Voltage

230VAC per phase

Conductor cross-section (mm2)

10-16

AWG no.

8-6

5-2. Connecting to the AC Utility

Overview of AC Connection Socket

Component

Description

Pressure dome

Clip

Sealing nut

Protective element

Socket element

Step 1: Check the grid voltage and frequency with an AC voltmeter. It should be the same to “VAC” value on the product label. Step 2: Turn off the circuit breaker. Step 3: Remove insulation sleeve 13 mm for five conductors. Step 4: Thread the five cables through pressure dome (A), clip (B), sealing nut (C) and protective element (D) in sequence.

B C D

Step 5: Thread five cables through socket element (E) according to polarities indicated on it and tighten the screws to fix wires after connection.

L1→ LINE 1 (Black) L2→ LINE 2 (Grey) L→ LINE 3 (Brown)

→ Ground (Yellow-Green)

N→ Neutral (Blue)

The reference tightening torque is 1.5-2.5 N.m. Step 6: Push protective dome (D) on to socket element (E) until both are locked tightly. Then, twist protective element (D) and pressure dome (A) so that all cables are firmly connected.

Step 7: Plug the AC connection socket into AC grid terminal of the inverter.

CAUTION: To prevent risk of electric shock, ensure the ground wire is properly earthed

before operating this hybrid inverter no matter the grid is connected or not.

6. PV Module (DC) Connection

CAUTION: Before connecting to PV modules, please install separately a DC circuit

breaker between inverter and PV modules.

NOTE1: Please use 1000VDC/20A circuit breaker. NOTE2: The overvoltage category of the PV input is II.

Please follow below steps to implement PV module connection:

Step 1: Check the input voltage of PV array modules. The acceptable input voltage of the inverter is 350VDC - 900VDC. This system is only applied with two strings of PV array. Please make sure that the maximum current load of each PV input connector is 18.6A.

Step 2: Disconnect the circuit breaker and switch off the DC switch.

Step 3: Assemble provided PV connectors with PV modules by the following below steps.

Components for PV connectors and Tools:

Female connector housing Female terminal

Male connector housing

Male terminal

CAUTION: Exceeding the maximum input voltage can destroy the unit!! Check the system before wire connection.

WARNING: Because this inverter is non-isolated, only three types of PV modules are acceptable: single crystalline and poly crystalline with class A-rated and CIGS modules. To avoid any malfunction, do not connect any PV modules with possibility of leakage current to the inverter. For example, grounded PV modules will cause leakage current to the inverter. When using CIGS modules, please be sure NOT grounding. CAUTION: It’s requested to have PV junction box with surge protection. Otherwise, it will cause inverter damage when lightning occurs on PV modules.

Crimping tool and spanner

Cable preparation and connector assembly process:

Strip one cable 8 mm on both end sides and be careful NOT to nick conductors.

Insert striped cable into female terminal and crimp female terminal as shown below charts.

Insert assembled cable into female connector housing as shown below charts.

Insert striped cable into male terminal and crimp male terminal as shown below charts.

Insert assembled cable into male connector housing as shown below charts.

Then, use spanner to screw pressure dome tightly to female connector and male connector as shown below.

Step 4: Check correct polarity of connection cable from PV modules and PV input connectors. Then, connect positive pole (+) of connection cable to positive pole (+) of PV input connector. Connect negative pole (-) of connection cable to negative pole (-) of PV input connector.

WARNING! It's very important for system safety and efficient operation to use appropriate cable for PV module connection. To reduce risk of injury, please use the proper recommended cable size as below.

Conductor cross-section (mm2)

AWG no.

CAUTION: Do NOT touch the inverter to avoid electric shock. When PV modules are exposed to sunlight, it may generate DC voltage to the inverter.

CAUTION: Never directly touch terminals of the inverter. It will cause lethal electric

Recommended Panel Configuration

Solar Panel Spec. (reference)

- 250Wp

- Vmp: 36.7Vdc

- Imp: 6.818A

- Voc: 44Vdc

- Isc: 7.636A

- Cells: 72

SOLAR INPUT 1

SOLAR INPUT 2

Q'ty of panels

Total

Input

Power

(Min in serial: 11pcs;

Max. in serial: 18pcs)

11pcs in serial

11pcs

2750W

11pcs in serial

11pcs

2750W

11pcs in serial

22pcs

5500W

11pcs in serial,

2 parallel

22pcs

5500W

11pcs in serial,

2 parallel

22pcs

5500W

18pcs in serial

36pcs

9000W

14pcs in serial,

2 parallel

14pcs in serial

42pcs

10500W

18pcs in serial,

2 parallel

18pcs in serial

54pcs

13500W

15pcs in serial,

2 parallel

15pcs in serial,

2 parallel

60pcs

15000W

7. Battery Connection

CAUTION: Before connecting to batteries, please install separately a DC circuit

breaker between inverter and batteries. NOTE1: Please only use sealed lead acid battery, vented and Gel battery. Please check maximum charging voltage and current when first using this inverter. If using Lithium iron or Nicd battery, please consult with installer for the details.

NOTE2: Please use 60VDC/300A circuit breaker. NOTE3: The overvoltage category of the battery input is II.

Please follow below steps to implement battery connection: Step 1: Check the nominal voltage of batteries. The nominal input voltage for inverter is 48VDC.

Step 2: Use two battery cables. Remove insulation sleeve 12 mm and insert conductor into cable ring terminal. Refer to right chart.

Step 3: Remove battery cover and follow battery polarity guide printed near the battery terminal! Place the external battery cable ring terminal over the battery terminal.

RED cable to the positive terminal (+); BLACK cable to the negative terminal (-).

WARNING! Wrong connections will damage the unit permanently.

Step 4: Make sure the wires are securely connected. The reference tightening torque is

2.04 N.m.

WARNING! It's very important for system safety and efficient operation to use appropriate cable for battery connection. To reduce risk of injury, please use the proper recommended cable size as below.

Nominal Battery Voltage

48V

Conductor cross-section (mm2)

AWG no.

3/0

Protective earthing (battery side)

150mm2 (300kcmil)

8. Load (AC Output) Connection

8-1. Preparation CAUTION: To prevent further supply to the load via the inverter during any mode of

operation, an additional disconnection device should be placed on in the building wiring installation. WARNING! It's very important for system safety and efficient operation to use appropriate cable for AC connection. To reduce risk of injury, please use the proper recommended cable size as below.

Nominal Grid Voltage

208/220/230/240 VAC per phase

Conductor cross-section (mm2)

5.5-10

AWG no.

10-8

8-2. Connecting to the AC output

Overview of Load Connection Socket

Component

Description

Pressure dome

Clip

Sealing nut

Protective element

Socket element

Step 1: Remove insulation sleeve 8.5 mm for five conductors. Step 2: Thread the five cables through pressure dome (A), clip (B), sealing nut (C) and protective element (D) in sequence.

Step 3: Thread five cables through socket element (E) according to polarities indicated on it and tighten the screws to fix wires after connection.

L1→ LINE 1 (Black) L2→ LINE 2 (Grey) L→ LINE 3 (Brown)

→ Ground (Yellow-Green)

N→ Neutral (Blue)

The reference tightening torque is 1.0-1.5 N.m.

Step 4: Push protective dome (D) on to socket element (E) until both are locked tightly. Then, twist protective element (D) and pressure dome (A) so that all cables are firmly connected.

Step 5: Plug the socket into the terminal.

CAUTION: It’s only allowed to connect load to “AC Output Connector”. Do NOT connect the utility to “AC Output Connector”.

CAUTION: Be sure to connect L terminal of load to L terminal of “AC Output Connector” and N terminal of load to N terminal of “AC Output Connector”. The G terminal of “AC Output Connector” is connected to grounding of the load. Do NOT mis-connect.

9. Communication

The inverter is equipped with several communication ports and it is also equipped with a slot for alternative communication interfaces in order to communicate with a PC with corresponding software. This intelligent slot is suitable to install with SNMP card and Modbus card. Follow below procedure to connect communication wiring and install the software.

For RS232 port, you should use a DB9 cable as follows:

For USB port, you should use a USB cable as follows:

For Dry contact port, please remove insulation sleeve 8 mm for three conductors and insert three cables into ports

For SNMP or MODBUS card, you should use RJ45 cables as follows:

Please install monitoring software in your computer. Detailed information is listed in the next chapter. After software is installed, you may initial the monitoring software and

extract data through communication port.

10. Dry Contact Signal

There is one dry contact available on the bottom panel. It could be used to remote control for external generator.

10-1. Electric Parameter

Parameter

Symbol

Max.

Unit

Relay DC voltage

Vdc

Relay DC current

Idc

Note: The application of the dry contact should not exceed the electric parameter shown as above. Otherwise, the internal relay will be damaged.

10-2. Function Description

Unit Status

Condition

Dry contact port:

NO&C

NC&C

Power Off

Unit is off and no output is powered.

Open

Power On

Battery voltage is lower than setting battery cut-off discharging voltage when grid is available.

Open

Battery voltage is lower than setting battery cut-off discharging voltage when grid is unavailable.

Open

Battery voltage is higher than below 2 setting values:

1. Battery re-discharging voltage

when grid is available.

2. Battery re-discharging voltage

when grid unavailable.

Open

You can set the related parameters in software. Refer to below chart:

11. Relay Control Port

This port is available to provide a power source (230V/8A) to trigger external relay. This function is only valid for Grid-tie with backup II mode.

11-1. Interface Configuration

There are four pins on this port. However, only Pin 1 and Pin 4 are worktable. Please use supplied cables to connect Pin 1 and Pin 4 shown as below charts.

11-2. Function Description

Unit

status

Condition

Output voltage from

relay control port

Power Off

Unit is off and no output is powered.

Power On

When the unit is working at inverter mode and grid is not available.

Condition 1:

Condition 2:

230V

Power on

Condition 3:

230V

When the unit is not working at inverter mode or grid is available.

11-3. Application

Below chart is recommended circuit wiring.

3-phase inverter

12. Application with Energy Meter

With Modbus card II and energy meter, hybrid inverter can be easily integrated into the existing household system. For details please refer to Modbus card II manual.

Note: this application is only valid for Grid-Tie with Backup II mode.

Equipped with Modbus card II, hybrid inverter is connected to energy meter with RS485 communication port. It’s to arrange self-consumption via Modbus card to control power generation and battery charging of the inverter.

13. Commissioning

Step 1: Check the following requirements before commissioning:

 Ensure the inverter is firmly secured  Check if the open circuit DC voltage of PV module meets requirement (Refer to

Section 6)

 Check if the open circuit utility voltage of the utility is at approximately same to

the nominal expected value from local utility company.

 Check if connection of AC cable to grid (utility) is correct if the utility is required.  Full connection to PV modules.  AC circuit breaker (only applied when the utility is required), batter circuit breaker,

and DC circuit breaker are installed correctly.

Step 2: Switch on the battery circuit breaker and then switch on PV DC breaker. After that, if there is utility connection, please switch on the AC circuit breaker. At this moment, the inverter is turned on already. However, there is no output generation for loads. Then:

 If LCD lights up to display the current inverter status, commissioning has been

successfully. After pressing “ON” button for 1 second when the utility is detected, this inverter will start to supply power to the loads. If no utility exists, simply press “ON” button for 3 seconds. Then, this inverter will start to supply power to the loads.

 If a warning/fault indicator appears in LCD, an error has occurred to this inverter.

Please inform your installer.

Step 3: Please insert CD into your computer and install monitoring software in your PC. Follow below steps to install software.

1. Follow the on-screen instructions to install the software.

2. When your computer restarts, the monitoring software will appear as shortcut icon

located in the system tray, near the clock.

NOTE: If using modbus card as communication interface, please install bundled software. Check local dealer for the details.

14. Initial Setup

Before inverter operation, it’s required to set up “Operation Mode” via software. Please strictly follow below steps to set up. For more details, please check software manual. Step 1: After turning on the inverter and installing the software, please click “Open Monitor” to enter main screen of this software.

Step 2: Log in into software first by entering default password “administrator”. Step 3: Select Device Control>>MyPower Management. It is to set up inverter

operation mode and personalized interface. Refer to diagram below.

Mode

There are three operation modes: Grid-tie with backup, Grid-Tie and Off-Grid.

 Grid-tie with backup: PV power can feed-in back to grid, provide power to the

load and charge battery. There are four options available in this mode: Gridtie with backup I, II, III and IV. In this mode, users can configure

PV power

supply priority, charging source priority and load supply source priority.

However, when Grid-tie with backup IV option is selected in PV energy supply priority, the inverter is only operated between two working logics based on defined peak time and off-peak time of electricity. Only peak time and off-peak time of electricity are able to set up for optimized electricity usage.

 Grid-Tie: PV power only can feed-in back to grid.  Off-Grid: PV power only provides power to the load and charge battery. No

feed-in back to grid is allowed.

SECTION A:

Standard: It will list local grid standard. It’s requested to have factory password to

make any modifications. Please check local dealer only when this standard change is requested.

CAUTION: Wrong setting could cause the unit damage or not working.

Nominal Output Voltage: 230V.

Nominal Output Frequency: 50HZ.

SECTION B:

This section contents may be different based on different selected types of operations.

Allow AC charging duration: It’s a period time to allow AC (grid) to charge battery. When the duration is set up as 0:00-00:00, it means no time limitation for AC to charge battery.

AC output ON/Off Timer: Set up on/off time for AC output of inverter. If setting it as 00:00/00:00, this function is disabled.

Allow to charge battery: This option is automatically determined by setting in

“Charging source”. It’s not allowed to modify here. When “NONE” is selected in

charging source section, this option becomes unchecked as grey text. Allow AC to charge battery: This option is automatically determined by setting

in ”Charging source”. It’s not allowed to modify here. When “Grid and PV” or “Grid or PV” is selected in charging source section, this option is default selected. Under

Grid-tie mode, this option is invalid.

Allow to feed-in to the Grid: This option is only valid under Grid-tie and Grid-tie with backup modes. Users can decide if this inverter can feed-in to the grid.

Allow battery to discharge when PV is available: This option is automatically

determined by setting in “Load supply source (PV is available)”. When “Battery” is higher priority than “Grid” in Load supply source (PV is available), this option is

default selected. Under Grid-tie, this option is invalid.

Allow battery to discharge when PV is unavailable: This option is automatically

determined by setting in “Load supply source (PV is unavailable)”. When “Battery” is higher priority than “Grid” in Load supply source (PV is unavailable), this option is

default selected. Under Grid-tie mode, this option is invalid.

Allow battery to feed-in to the Grid when PV is available: This option is only valid in Grid-tie with backup II or Grid-tie with backup III modes.

Allow battery to feed-in to the Grid when PV is unavailable: This option is only valid in all options of Grid-tie with backup mode.

Grid-tie with backup

 Grid-tie with backup (I) :

PV energy supply priority setting: 1st Battery, 2nd Load and 3rd Grid. PV power will charge battery first, then provide power to the load. If there is any remaining power left, it will feed-in to the grid. Battery charging source:

1. PV and Grid (Default)

It’s allowed to charge battery from PV power first. If it’s not sufficient, grid will charge

battery.

2. PV only

It is only allow PV power to charge battery.

3. None

It is not allowed to charge battery no matter it’s from PV power or grid. Load supply source: When PV power is available: 1st PV, 2nd Grid, 3rd Battery If battery is not fully charged, PV power will charge battery first. And remaining PV

power will provide power to the load. If it’s not sufficient, grid will provide power to

the load. If grid is not available at the same time, battery power will back up.

When PV power is not available:

1. 1

Grid, 2nd Battery (Default) Grid will provide power to the load at first. If grid is not available, battery power will provide power backup.

2. 1

Battery, 2nd Grid Battery power will provide power to the load at first. If battery power is running out, grid will back up the load. NOTE: This option will become ineffective during AC charging time and the priority will automatically become 1st Grid and 2nd Battery order. Otherwise, it will cause battery damage.

 Grid-tie with backup (II) :

PV energy supply priority setting: 1st Load, 2nd Battery and 3rd Grid. PV power will provide power to the load first. Then, it will charge battery. If there is any remaining power left, it will feed-in to the grid. Battery charging source:

1. PV and Grid

It’s allowed to charge battery from PV power first. If it’s not sufficient, grid will charge

battery.

2. PV only

It is only allow PV power to charge battery.

3. None

It is not allowed to charge battery no matter it’s PV power or grid. Load supply source: When PV power is available:

1. 1

PV, 2nd Battery, 3rd Grid

PV power will provide power to the load first. If it’s not sufficient, battery power will

provide power to the load. When battery power is running out or not available, grid will back up the load.

2. 1

PV, 2nd Grid, 3rd Battery PV power will provide power to the load first. If it’s not sufficient, grid will provide power to the load. If grid is not available at the same time, battery power will back up.

When PV power is not available:

1. 1

Grid, 2nd Battery: Grid will provide power to the load at first. If grid is not available, battery power will provide power backup.

2. 1

Battery, 2nd Grid: Battery power will provide power to the load at first. If battery power is running out, grid will back up the load NOTE: This option will become ineffective during AC charging time and the priority will automatically become 1st Grid and 2nd Battery order. Otherwise, it will cause battery damage.

 Grid-tie with backup (III):

PV energy supply priority setting: 1st Load, 2nd Grid and 3rd Battery PV power will provide power to the load first. If there is more PV power available, it will feed-in to the grid. If feed-in power reaches max. feed-in power setting, the remaining power will charge battery. NOTE: The max. feed-in grid power setting is available in parameter setting. Please refer to software manual.

Battery charging source:

1. PV and Grid: It’s allowed to charge battery from PV power first. If it’s not sufficient,

grid will charge battery.

2. PV only: It is only allow PV power to charge battery.

3. None: It is not allowed to charge battery no matter it’s PV power or grid.

Load supply source: When PV power is available:

1. 1

PV, 2nd Battery, 3rd Grid PV power will provide power to the load first. If it’s not sufficient, battery power will provide power to the load. When battery power is running out or not available, grid will back up the load.

2. 1

When PV power is not available:

1. 1

Grid, 2nd Battery: Grid will provide power to the load at first. If grid is not available, battery power will provide power backup.

2. 1

Battery, 2nd Grid: Battery power will provide power to the load at first. If

battery power is running out, grid will back up the load. NOTE: This option will become ineffective during AC charging time and the priority will automatically become 1st Grid and 2nd Battery order. Otherwise, it will cause battery damage.

 Grid-tie with backup (IV): Users are only allowed to set up peak time and off-

peak electricity demand.

Working logic under peak time:

PV energy supply priority: 1st Load, 2nd Battery and 3rd Grid PV power will provide power to the load first. If PV power is sufficient, it will charge battery next. If there is remaining PV power left, it will feed-in to the grid. Feed-in to the grid is default disabled. Battery charging source: PV only Only after PV power fully supports the load, the remaining PV power is allowed to charge battery during peak time. Load supply source: 1st PV, 2nd Battery, 3rd Grid PV power will provide power to the load first. If PV power is not sufficient, battery power will back up the load. If battery power is not available, grid will provide the load. When PV power is not available, battery power will supply the load first. If battery power is running out, grid will back up the load.

Working logic under off-peak time: PV energy supply priority: 1st Battery, 2nd Load and 3rd Grid PV power will charge battery first. If PV power is sufficient, it will provide power to the loads. The remaining PV power will feed to the grid. NOTE: The max. feed-in grid power setting is available in parameter setting. Please refer to software manual.

Battery charging source: PV and grid charge battery PV power will charge battery first during off-peak time. If it’s not sufficient, grid will charge battery. Load supply source: 1st PV, 2nd Grid, 3rd Battery When battery is fully charged, remaining PV power will provide power to the load first. If PV power is not sufficient, grid will back up the load. If grid power is not available, battery power will provide power to the load.

Grid-Tie

Under this operation mode, PV power only feeds-in to the grid. No priority setting is available.

Off-Grid

 Off-Grid (I): Default setting for off-grid mode.

PV energy supply priority setting: 1st Load, 2nd Battery PV power will provide power to the load first and then charge battery. Feed-in to the grid is not allowed under this mode. At the same time, the grid relay is connected in Inverter mode. That means the transfer time from inverter mode to battery mode will be less than 15ms. Besides, it will avoid overload fault because grid can supply load when connected load is over 10KW. Battery charging source:

1. PV or Grid: If there is remaining PV power after supporting the loads, it will charge

battery first. Only until PV power is not available, grid will charge battery. (Default)

2. PV only: It is only allow PV power to charge battery.

3. None: It is not allowed to charge battery no matter it’s PV power or grid.

Load supply source: When PV power is available:

1. 1

PV, 2nd Battery, 3rd Grid (Default)

PV power will provide power to the load first. If it’s not sufficient, battery power will

provide power to the load. When battery power is running out or not available, grid will back up the load.

2. 1

When PV power is not available:

1. 1

Grid, 2nd Battery Grid will provide power to the load at first. If grid is not available, battery power will

provide power backup.

2. 1

Battery, 2nd Grid (Default) Battery power will provide power to the load at first. If battery power is running out, grid will back up the load. NOTE: This option will become ineffective during AC charging time and the priority will automatically become 1st Grid and 2nd Battery order. Otherwise, it will cause battery damage.

 Off-Grid (II)

PV energy supply priority setting: 1st Battery, 2nd Load PV power will charge battery first. After battery is fully charged, if there is remaining PV power left, it will provide power to the load. Feed-in to the grid is not allowed under this mode. At the same time, the grid relay is connected in Inverter mode. That means the transfer time from inverter mode to battery mode will be less than 15ms. Besides, it will avoid overload fault because grid can supply load when connected load is over 10KW. Battery charging source:

1. PV or Grid: If there is remaining PV power after supporting the loads, it will

charge battery first. Only until PV power is not available, grid will charge battery.

2. PV only: It is only allow PV power to charge battery.

3. None: It is not allowed to charge battery no matter it’s PV power or grid.

NOTE: It’s allowed to set up AC charging duration. Load supply source: When PV power is available: 1st PV, 2nd Grid, 3rd Battery

PV power will provide power to the load first. If it’s not sufficient, grid will provide

power to the load. If grid is not available at the same time, battery power will back up.

When PV power is not available:

1. 1

Grid, 2nd Battery: Grid will provide power to the load at first. If grid is not available, battery power will provide power backup.

2. 1

Battery, 2nd Grid: Battery power will provide power to the load at first. If battery power is running out, grid will back up the load. NOTE: This option will become ineffective during AC charging time and the priority will automatically become 1st Grid and 2nd Battery order. Otherwise, it will cause battery damage.

 Off-Grid (III)

PV energy supply priority setting: 1st Load, 2nd Battery

PV power will provide power to load first and then charge battery. Feed-in to the grid is not allowed under this mode. The grid relay is NOT connected in Inverter mode. That means the transfer time from inverter mode to battery mode will be about 15ms. If connected load is over 10KW and grid is available, this inverter will allow grid to provide power to the loads and PV power to charge battery. Otherwise, this inverter will activate fault protection.

Battery charging source:

1. PV or Grid: If there is remaining PV power after supporting the loads, it will

charge battery first. Only until PV power is not available, grid will charge battery.

2. PV only: It is only allow PV power to charge battery.

3. None: It is not allowed to charge battery no matter it’s PV power or grid.

NOTE: It’s allowed to set up AC charging duration.

Load supply source: When PV power is available: 1st PV, 2nd Battery, 3rd Grid

PV power will provide power to the load first. If it’s not sufficient, battery power will

back up the load. Only after battery power is running, Grid will back up the load. When PV power is not available:

1. 1

Grid, 2nd Battery: Grid will provide power to the load at first. If grid is not available, battery power will provide power backup.

2. 1

15. Operation

15-1. Interface

This display is operated by four buttons.

NOTICE: To accurately monitor and calculate the energy generation, please calibrate the timer of this unit via software every one month. For the detailed calibration, please check the user manual of bundled software.

15-2. LCD Information Define

Display

Function

Indicates AC input voltage or frequency. Vac: voltage, Hz: frequency, L1N/L2N/L3N: Line phase

Indicates AC output power, voltage, frequency, or load percentage. KVA: apparent power, KW: active power, Vac: Voltage, %: Load percentage, Hz: frequency, L1N/L2N/L3N: AC output phase

Indicates PV input voltage or power. Volt: voltage, KW: power, P1: PV input 1, P2: PV input 2

Indicates battery voltage or percentage. Volt: voltage, %: percentage

Real-time operation status

Section 12-5 describes all operation conditions when the inverter is set up at “Grid-tie with backup (I)” mode.

Indicates charging current to battery or discharging current from battery.

Indicates that the warning occurs.

Indicates that the fault occurs.

Indicates fault code or warning code.

Indicates date and time, or the date and time users set for querying energy generation.

Indicates solar panels. Icon flashing indicates PV input voltage or is out of range.

Indicates utility. Icon flashing indicates utility voltage or frequency is out of range.

Indicates battery condition. And the lattice of the icon indicates battery capacity.

Icon flashing indicates battery is not allowed to discharge.

Icon flashing indicates the battery voltage is too low.

Indicates AC output for loads is enabled and inverter is providing power to the connected loads.

Indicates AC output for loads is enabled but there is no power provided from inverter. At this time, no battery and the utility are available. Only PV power exists but is not able to provide power to the connected loads.

Indicates overload.

Indicates PV energy generated.

15-3. Button Definition

Button

Operation

Function

ENTER/ON

Short press.

Enter query menu.

If it’s in query menu, press this button to confirm selection or entry.

Press and hold the button for approximately 1 second when the utility is detected or 3 seconds without the utility.

This inverter is able to provide power to connected loads via AC output connector.

ESC/OFF

Short press.

Return to previous menu.

Press and hold the button until the buzzer continuously sounds.

Turn off power to the loads.

Short press.

Select last selection or increase value.

Down

Short press.

If it’s in query menu, press this button

to jump to next selection or decrease value.

Mute alarm in standby mode or battery mode.

NOTE: If backlight shuts off, you may activate it by pressing any button. When an error occurs, the buzzer will continuously sound. You may press any button to mute it.

15-4. Query Menu Operation

The display shows current contents that have been set. The displayed contents can be changed in query menu via button operation. Press ‘Enter’ button to enter query menu. There are seven query selections:

 Input voltage or frequency of AC input.  Frequency, voltage, power or load percentage of AC output.  Input voltage or power of PV input.  Battery voltage or capability percentage.  Date and time.  Today or total energy generated.  Mode of query energy generated.

Setting Display Procedure

 Input voltage or frequency of AC input

Procedure

 Frequency, voltage, power or percentage of AC output

Procedure

Input voltage or power of PV input.

Procedure

 Battery voltage or percentage.

Procedure

 Date and time.

Procedure

 Today or total energy generated.

Procedure

15-5. Operation Mode & Display

Below is only contained LCD display for grid-tie with backup mode (I). If you need to know other operation mode with LCD display, please check with installer.

Inverter mode with grid connected

This inverter is connected to grid and working with DC/INV operation.

LCD Display

Description

PV power is sufficient to charge battery, provide power to loads, and then feed in to the grid.

PV power is sufficient to charge the battery first. However, remaining PV power is not sufficient to back up the load. Therefore, remaining PV power and the utility are supplying power to the connected load.

PV power is generated, but not sufficient enough to charge battery by itself. PV power and the utility are charging battery at the same time. And the utility is also supplying power to the connected load.

This inverter is disabled to generate power to the loads via AC output. PV power is sufficient to charge battery first. Remaining PV power will feed in back to grid.

This inverter is disabled to generate power to the loads via AC output. PV power and utility are charging battery at the same time because of insufficient PV power.

This inverter is disabled to generate power to the loads via AC output. PV power is feeding power back to the grid.

PV power is sufficient to provide power to loads and feed power back to the grid.

PV power and utility are providing power to the connected loads because of insufficient PV power.

Inverter mode without grid connected

This inverter is working with DC/INV operation and not connecting to the grid.

LCD Display

Description

PV power is sufficient to charge battery and provide power to the connected loads.

PV power is generated, but not sufficient to power loads by itself. PV power and battery are providing power to the connected loads at the same time.

Only battery power is available to provide power to connected loads.

Bypass mode

The inverter is working without DC/INV operation and connecting to the loads.

LCD Display

Description

Only utility is charging battery and providing power to connected loads.

Only utility is available to provide power to connected loads.

Standby mode :

The inverter is working without DC/INV operation and load connected.

LCD Display

Description

This inverter is disabled on AC output or even AC power output is enabled, but an error occurs on AC output. Only PV power is sufficient to charge battery.

This inverter is disabled to generate power to the loads via AC output. PV power is not detected or available at this moment. Only utility is available to charge battery.

If PV, battery or utility icons are flashing, it means they are not within acceptable working range. If they are not displayed, it means they are not detected.

16. Charging Management

Charging Parameter

Default

Value

Note

Charging current

60A

It can be adjusted via software from 10Amp to 200Amp.

Floating charging voltage (default)

54.0 Vdc

It can be adjusted via software from 50Vac to 60Vdc.

Max. absorption charging voltage (default)

56.0 Vdc

It can be adjusted via software from 50Vac to 60Vdc.

Battery overcharge protection

62.0 Vdc

Charging process based on default setting.

3 stages:

First – max. charging voltage increases to 56V;

Second- charging voltage will maintain at 56V until charging current is down to 12 Amp;

Third- go to floating charging at 54V.

Bulk FloatingAbsorption

time

Bulk Voltage

Float Voltage

This inverter can connect to battery types of sealed lead acid battery, vented battery, gel battery and lithium battery. The detail installation and maintenance explanations of the external battery pack are provided in the manufacturer’s external battery pack of manual.

If using sealed lead acid battery, please set up the max. charging current according to below formula:

The maximum charging current = Battery capacity (Ah) x 0.2

For example, if you are using 300 Ah battery, then, maximum charging current is 300 x

0.2=60 (A). Please use at least 50Ah battery because the settable minimum value of charging current is 10A. If using AGM/Gel or other types of battery, please consult with installer for the details.

Below is setting screen from software:

17. Maintenance & Cleaning

Check the following points to ensure proper operation of whole solar system at regular intervals.

 Ensure all connectors of this inverter are cleaned all the time.  Before cleaning the solar panels, be sure to turn off PV DC breakers.  Clean the solar panels, during the cool time of the day, whenever it is visibly dirty.  Periodically inspect the system to make sure that all wires and supports are

securely fastened in place.

Battery Maintenance

 Servicing of batteries should be performed or supervised by personnel

knowledgeable about batteries and the required precautions.

 When replacing batteries, replace with the same type and number of batteries or

battery packs.

 The following precautions should be observed when working on batteries:

a) Remove watches, rings, or other metal objects. b) Use tools with insulated handles. c) Wear rubber gloves and boots. d) Do not lay tools or metal parts on top of batteries. e) Disconnect charging source prior to connecting or disconnecting battery terminals. f) Determine if battery is inadvertently grounded. If inadvertently grounded, remove source from ground. Contact with any part of a grounded battery can result in electrical shock. The likelihood of such shock can be reduced if such grounds are removed during installation and maintenance (applicable to equipment and remote battery supplies not having a grounded supply circuit).

WARNING: There are no user-replaceable parts inside of the inverter. Do not attempt

to service the unit yourself.

CAUTION: A battery can present a risk of electrical shock and high short-circuit current.

CAUTION: Do not dispose of batteries in a fire. The batteries may explode. CAUTION: Do not open or mutilate batteries. Released electrolyte is harmful to

the skin and eyes. It may be toxic.

18. Trouble Shooting

When there is no information displayed in the LCD, please check if PV module/battery/grid connection is correctly connected. NOTE: The warning and fault information can be recorded by remote monitoring software.

18-1. Warning List

There are 17 situations defined as warnings. When a warning situation occurs, icon

will flash and will display warning code. If there are several codes, it will display in sequences. Please contact your installer when you couldn’t handle with the warning situations.

Code

Warning Event

Icon

(flashing)

Description

Line voltage high loss

Grid voltage is too high.

Line voltage low loss

Grid voltage is too low.

Line frequency high loss

Grid frequency is too high.

Line frequency low loss

Grid frequency is too low.

Line voltage loss for long time

Grid voltage is higher than 253V.

Ground Loss

Ground wire is not detected.

Island detect

Island operation is detected.

Line waveform loss

The waveform of grid is not suitable for inverter.

Line phase loss

The phase of grid is not in right sequence.

EPO detected

EPO is open.

Overload

Load exceeds rating value.

Over temperature

The temperature is too high inside.

Batter voltage low

Battery discharges to low alarm point.

Battery under-voltage when grid is loss

Battery discharges to shutdown point.

Battery open

Battery is unconnected or too low.

Battery under-voltage when grid is OK

Battery stops discharging when the grid is OK.

Solar over voltage

PV voltage is too high.

18-2. Fault Reference Codes

When a fault occurs, the icon will flash as a reminder. See below for fault codes for reference.

Situation

Solution

Fault

Code

Fault Event

Possible cause

Bus voltage over

Surge

1. Restart the inverter.

2. If the error message still remains, please contact your installer.

BUS voltage under

PV or battery disconnect suddenly

1. Restart the inverter

2. If the error message still remains, please contact your installer.

BUS soft start time out

Internal components failed.

Please contact your installer.

INV soft start time out

Internal components failed.

Please contact your installer.

INV over current

Surge

1. Restart the inverter.

2. If the error message still remains, please contact your installer.

Over temperature

Internal temperature is too high.

1. Check the ambient temperature and fans.

2. If the error message still remains, please contact your installer.

Relay fault

Internal components failed.

Please contact your installer.

CT sensor fault

Internal components failed.

Please contact your installer.

Solar input power abnormal

1. Solar input driver damaged.

2. Solar input power is too much when voltage is more than 850V.

1. Please check if solar input voltage is higher than 850V.

2. Please contact your installer.

Solar over current

Surge

1. Restart the inverter.

2. If the error message still remains, please contact your installer.

GFCI fault

Leakage current excceds the limit.

1. Check the wire and panels which may cause the leakage.

2. If the error message still remains, please contact your installer.

PV ISO fault

The resistance between PV and ground is too low.

INV DC current over

Utility fluctuates.

1. Restart the inverter.

2. If the error message still remains, please contact your installer.

GFCI sensor fault

GFCI sensor failed.

Please contact your installer.

Battery high voltage fault

Battery voltage exceeds the limit.

1. Check the battery voltage.

2. If the error message still remains, please contact your installer.

Over load

The inverter is loaded with more than 110% load and time is up.

Reduced the connected load by switching off some equipment.

INV short

Output short circuited.

Check if wiring is connected well and remove abnormal load.

Fan lock

Fan failed.

Please contact your installer.

INV DC voltage over

Load fluctuates

1. Restart the inverter.

2. If the error message still remains, please contact your installer.

INV voltage low

Internal components failed.

Please contact your installer.

INV voltage high

Internal components failed.

Please contact your installer.

Wire connection fault

Internal wires loosen.

Please contact your installer.

OP voltage fault

Grid connects to output terminal

Don’t connect the grid to the ouput terminal.

19. Specifications

MODEL

10KW

RATED POWER

10000 W

PV INPUT (DC)

Maximum DC Power

14850 W

Nominal DC Voltage

720 VDC

Maximum DC Voltage

900 VDC

Working DC Voltage Range

300 VDC ~ 900 VDC

Start-up Voltage / Initial Feeding Voltage

320 VDC / 350 VDC

MPP Voltage Range / Full Load MPP Voltage Range

350 VDC ~ 850 VDC / 400 VDC ~ 800 VDC

Maximum Input Current

2*18.6 A

Isc PV (absolute maximum)

25 A

Max. inverter back feed current to the array

0 A

GRID OUTPUT (AC)

Nominal Output Voltage

230 VAC (P-N) / 400 VAC (P-P)

Output Voltage Range

184 - 265 VAC per phase

Output Frequency Range

47.5 ~ 51.5 Hz or

59.3~ 60.5Hz

Nominal Output Current

14.5 A per phase

Inrush Current/Duration

17 A per phase / 20ms

Maximum Output Fault Current/Duration

51 A per phase / 1ms

Maximum output Overcurrent Protection

51 A per phase

Power Factor Range

0.9 lead – 0.9 lag

AC INPUT

AC Start-up Voltage

120-140 VAC per phase

Auto Restart Voltage

180 VAC per phase

Acceptable Input Voltage Range

170 - 280 VAC per phase

Nominal Frequency

50 Hz / 60 Hz

AC Input Power

10000VA/10000W

Maximum AC Input Current

40 A

Inrush Input Current

40 A / 1ms

BATTERY MODE OUTPUT (AC)

Nominal Output Voltage

230 VAC (P-N) / 400 VAC (P-P)

Output Frequency

50 Hz / 60 Hz (auto sensing)

Output Waveform

Pure sine wave

Output Power

10000VA/10000W

Efficiency (DC to AC)

91%

BATTERY & CHARGER (Lead-acid/Li-ion)

DC Voltage Range

40 – 60 VDC

Nominal DC Voltage

48 VDC

Maximum Battery Discharging Current

275 A

Maximum Charging Current

200 A

GENERAL

PHYSICAL

Dimension, D X W X H (mm)

622 x 500 x 167.2

Net Weight (kgs)

INTERACE

Communication Port

RS-232/USB

Intelligent Slot

Optional SNMP, Modbus and AS-400 cards

available

ENVIRONMENT

Protective Class

Ingress Protection Rating

IP20

Humidity

0 ~ 90% RH (No condensing)

Operating Temperature

-10 to 55°C (Power derating above 50°C)

Altitude

Max. 2000m*

* Power derating 1% every 100m when altitude is over 1000m.

Voltronic Power 10KW User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual