Fronius Fronius Symo USA - Installation (Online) Installation Instruction [EN]

Installation
Instructions

Fronius Symo - Installation

10.0-3 208-240

12.0-3 208-240

10.0-3 480

12.5-3 480

15.0-3 480

15.0-3 208

17.5-3 480

20.0-3 480

22.7-3 480

24.0-3 480

EN-US

Installation instructions

42,0426,0202,EA 018-16052022

Table of contents

Safety 5

General 5
Electrical installations 5

Installation location and position 6

Explanation of safety instructions 6
Safety 6
Intended Use 7
Location Selection 8
Installation position of the inverter 9
General Location Selection 10
Example: Installation of several inverters 11
Do not ground the solar modules. 11

Preparation 13

Attaching the Mounting Bracket 15

Safety 15
Selecting Dowels and Screws 15
Screw recommendation 15
Opening the Inverter 15
Installing the Mounting Bracket on a Wall 16
Installing the Mounting Bracket on a Mast or Beam 17
Attaching the mounting bracket to a metal carrier 17
Do not warp or deform the mounting bracket 18

Knockouts 19

Safety 19
General 19
Knocking or Drilling Out Knockouts 20

EN-US

AC~ 23

Suitable Grids 25
Connecting the inverter to the public grid (AC side) 26

Safety 26
Permitted Cables 27
Preparing Aluminum Cables for Connection 29
Monitoring the grid 30
Fronius Symo 15.0-3 208 – ferrite ring 30
Connecting the Inverter to the Public Grid (AC) 30
Maximum AC fuse protection 31
Additional external AC and/or DC disconnect 33

DC= 35

Notes on the Multi-MPP Tracker inverter 37

Multi MPP Tracker – Inverter 37

Connecting solar module strings to the inverter 38

Safety 38
String fuses 39
Permitted Cables 40
General Information about Solar Modules 42
Connecting Aluminum Cables 43
Connecting Solar Module Strings to the Inverter 44

Laying Solar.Net Cables 47

Data communication 49

Lay data communication cables 49
Installing Datamanager in the Inverter 50

Finally... 53

3

Seal Conduits 55
Clipping the Inverter onto the Mounting Bracket 56

Clipping the Inverter onto the Mounting Bracket 56

Using for the first time 59

Using the Inverter for the First Time 59

Options 61

USB Stick as a Data Logger and for Updating Inverter Software 63

USB Flash Drive as a Data Logger 63
Data on the USB stick 63
Data Amount and Memory Capacity 64
Buffer Memory 65
Suitable USB Thumb Drives 65
USB Stick for Updating Inverter Software 66
Removing the USB Stick 66

Options 67

Options 67
OPTION 'ShadeCover' 67

Care and maintenance 69

Notes on Maintenance 71

Maintenance 71
Cleaning 71

4

Safety

General This manual contains important instructions for the inverter that must be fol-

lowed during installation and maintenance of the inverter.

The inverter is designed and tested according to international safety require­ments. Due to its electrical and electronic components, certain precautions must
be taken when installing and operating the inverter.
In order to reduce the risk of injury to persons and to ensure safe installation and
operation of the inverter, be sure to read these Operating Instructions carefully
and follow all instructions and safety instructions.

Failure to observe the Operating Instructions and safety instructions can void
the warranty and/or cause damage to the inverters or other property damage!

EN-US

Electrical in­stallations

All electrical installations must be carried out in accordance with the National
Electrical Code, ANSI/NFPA 70, and any other codes and regulations applicable
to the installation site.

For installations in Canada, the installations must be done in accordance with
applicable Canadian standards.

5

Installation location and position

Explanation of
safety instruc­tions

Safety

WARNING!

Indicates a potentially dangerous situation.

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

▶

CAUTION!

Indicates a potentially harmful situation.

Minor injury or damage to property may result if appropriate precautions are

▶

not taken.

NOTE!

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

Please pay special attention when one of the symbols from the "Safety rules"
chapter appears in these instructions.

WARNING!

Danger from incorrect operation and work that is not carried out properly.

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

Only qualified staff are authorized to commission the inverter and only with-

▶

in the scope of the respective technical regulations.
Read the Installation Instructions and Operating Instructions before install-

▶

ation and commissioning.

WARNING!

Danger from work that is not carried out properly.

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

The surge protection device should only be installed and connected by li-

▶

censed electricians.
Observe the safety rules!

▶

Prior to all installation and connection work, disconnect the AC and DC sup-

▶

ply to the inverter.

6

Fire Prevention

CAUTION!

Danger due to faulty or incorrect installation.

This may result in damage to inverters and other current-carrying parts of a
photovoltaic system.
Faulty or improper installation may cause overheating of cables and terminals as
well as the formation of arcs. This could cause thermal damage, which in turn
may lead to fires.

Please note the following when connecting the AC and DC cables:

Securely tighten all terminals using the proper torque listed in the Operating

▶

Instructions
Securely tighten all grounding terminals (PE/GND) using the proper torque

▶

listed in the Operating Instructions, even for free grounding terminals
Do not overload cables

▶

Check cables for damage and correct wiring

▶

Follow all safety instructions, Operating Instructions, and any local connec-

▶

tion regulations

Always secure the inverter to the mounting bracket with fixing screws using

▶

the torque specified in the Operating Instructions.
Only put the inverter into operation with the fixing screws securely tightened.

▶

Notice! Fronius will not bear any costs for production downtimes, or for installa­tions, etc., which may arise due to a detected electric arc and its consequences.
Fronius accepts no liability for fires which may break out despite integrated arc
detection/interruption (e.g., due to a parallel arc).

EN-US

Notice! Before an inverter can be reset following a detected electric arc, check

the entire affected photovoltaic system for any damage.

The manufacturer's specifications for connection, installation, and operation
must be observed. You must carefully follow all installation steps and make all
connections in accordance with specifications and regulations to minimize any
risk of danger.
The tightening torques for the respective terminals are listed in the Installation
Instructions for the devices.

Intended Use The inverter is designed exclusively to convert direct current from solar modules

into alternating current and feed this power into the public grid.
The following are deemed to be not in conformity with its intended purpose:

Utilization for any other purpose, or in any other manner

-

Alternations to the inverter are not expressly recommended by Fronius

-

Installation of components that are not expressly recommended or sold by

-

Fronius.

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

Proper use also means

carefully reading and obeying the instructions and all the safety and danger

-

notices in the Operating and Installation Instructions
compliance with the maintenance operations

-

installation as specified in the Installation Instructions

-

7

When configuring the photovoltaic system, make sure that all components are

10.0-3 - 12.0-3 208-240

U

DC max

0 - 11154 ft.
(0 - 3400 m)

ft. (m)

600 V

1000 V

0 - 6561 ft.
(0 - 2000 m)

> 8202 - 9842 ft.
(> 2500 - 3000 m)
> 6561 - 8202 ft.
(> 2000 - 2500 m)

> 9842 - 11154 ft.
(> 3000 - 3400 m)

950 V

900 V

850 V

U

DC max

ft. (m)

10.0-3 - 24.0-3 480

> 11154 ft.
> 3400 m

NH

3

operating completely within their permitted operating range.

All measures recommended by the solar module manufacturer for maintaining
solar module properties must be followed.

Follow all grid operator regulations regarding grid power feed and connection
methods.

Location Selec­tion

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

The inverter is suitable for indoor installation.

The inverter is suitable for outdoor installation.

Because of its NEMA 4X protection class, the inverter is not sus­ceptible to hose water on any side and can also be operated in
moist environments. However:

In order to keep inverter heating as low as possible, do not ex­pose the inverter to direct sunlight. The inverter should be in­stalled in a protected location, e.g., near the solar modules or
under an overhanging roof.

IMPORTANT! The inverter must not be installed or operated
above an altitude of 11,154 ft. (3400 m).

The maximum permissible DC voltage of the inverter depends
on the altitude.

U

at an altitude of:

DCmax

Symo 10.0-3 – 12.0-3 208–240

0 to 11,154 ft ( 0 to 3400 m). = 600 V

Symo 10.0-3 – 24.0-3 480

0 to 6561 ft ( 0 to 2000 m). = 1000 V
6531 to 8202 ft (2000 to 2500 m). = 950 V
8202 to 9842 ft (2500 to 3000 m). = 900 V
9842 to 11,154 ft (3000 to 3400 m). = 850 V

The output power reduces when the device temperature is too

high, and this may occur earlier than normal at increased alti­tudes.

Do not install the inverter:

where it may be exposed to ammonia, corrosive gases, acids,

-

or salts
(e.g., fertilizer storage areas, vent openings for livestock
stables, chemical plants, tanneries)

8

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.

The inverter is designed to be dustproof in principle. However, in
areas of high dust accumulation, the cooling surfaces can be­come dusty, which can impair the thermal performance. In this
case, the dust must be removed regularly. We therefore recom­mend that installation is not carried out in areas and environ­ments with high dust accumulation (e.g., iron filings) as this can
cause damage to the inverter.

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

EN-US

Installation posi­tion of the in­verter

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

The inverter is suitable for a horizontal installation position.

The inverter is suitable for installation on a sloping surface.

Do not install the inverter on a sloping surface with the connec­tions upwards.

9

4 i

n.

100 m

m

4 i

n.

100 m

m

8 i

n.

200 m

m

-40 °F ­+

1

40 °F

-4

0 °C - +60 °C

0 -

100 %

Do not install the inverter in a sloping position on a vertical wall
or column.

Do not install the inverter in a horizontal position on a vertical
wall or column.

Do not install the inverter with the connections upwards on a
vertical wall or column.

Do not install the inverter overhanging with the connections up­wards.

General Location
Selection

Do not install the inverter overhanging with the connections
downwards.

Do not install the inverter on the ceiling.

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

10

Example: Install-

+

-

+

-

ation of several
inverters

Only install on a solid, non-flammable surface

Max. ambient temperatures: -40 °F/+140 °F (-40 °C/+60 °C)

Relative humidity: 0–100%

The air flow direction within the inverter is from right to top (cold air intake on
the right, hot air outflow at the top). The waste air may reach a temperature of
up to 70 °C.

When installing the inverter in a switch cabinet or similar closed environment,
it is necessary to make sure that the hot air that develops will be dissipated by
forced-air ventilation

If you wish to install the inverter on the outer walls of cattle stables, it is im­portant to keep a minimum clearance of 2 m between all sides of the inverter
and air vents and other openings.
The place of installation should not be exposed to ammonia, corrosive gases,
salts, or acids.

EN-US

Do not ground
the solar mod­ules.

The inverter is designed exclusively for
connection to and use with non-groun­ded solar modules. The solar modules
must not be grounded at either the
positive or negative pole.

11

12

Preparation

13

14

Attaching the Mounting Bracket

EN-US

Safety

WARNING!

Danger of residual voltage from capacitors.

An electric shock can be fatal.

Wait until the capacitors have discharged. Discharge takes 5 minutes.

▶

CAUTION!

Danger due to soiling or water on the terminals and contacts in the connection
area.

This may result in damage to the inverter.

When drilling, make sure that terminals and contacts in the connection area

▶

do not become soiled or wet.
The mounting bracket without integrated inverter does not correspond to the

▶

degree of protection according to the data sheet. For this reason do not
leave the mounting bracket exposed to environmental influences without the
inserted inverter.
Protect the mounting bracket from soiling and moisture during installation.

▶

NOTE!

Protection class NEMA4X is only ensured when the inverter is mounted and
firmly screwed into the mounting bracket.

The mounting bracket without inverter and ventilation channel has no NEMA pro­tection.

Selecting Dowels
and Screws

Screw recom­mendation

Opening the In­verter

Important! Depending on the surface, different mounting materials may be re-

quired for installing the mounting bracket. These mounting materials are not part
of the scope of delivery for the inverter. The installer is responsible for selecting
the proper mounting materials.

For the installation of the inverter we recommend steel or aluminum screws with
a diameter of 0.2–0.3 in. (6–8 mm).

WARNING!

Danger due to inadequate ground conductor connection.

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

The housing screws provide an adequate ground conductor connection for

▶

grounding the housing and should not be replaced under any circumstances
by other screws that do not provide a reliable ground conductor connection.

15

ON

OFF

Lock

1 2

lb

NO NEMA
ENCLOSURE TYPE

Installing the
Mounting Brack­et on a Wall

3

4

The mounting bracket must be secured in at least four places.

1 2

16

3

EN-US

Installing the
Mounting Brack­et on a Mast or
Beam

Attaching the
mounting brack­et to a metal car­rier

For installation of the inverter on a
mast or beam, Fronius recommends
using the "Pole clamp" (order no.
SZ 2584.000) mast mounting kit from
Rittal GmbH.
The kit can be used to mount the in­verter on round or rectangular masts
with the following diameters: Æ from
40 to 190 mm (round mast), ÿ from 50
to 150 mm (rectangular mast)

NOTE!

When mounted on metal supports, the inverter must not be exposed to rainwa­ter or splashing water from the rear.

Provide suitable rainwater protection or splash water protection.

The mounting bracket must be secured in at least four places.

17

1

Do not warp or
deform the
mounting brack­et

Notice! When attaching the mounting bracket to the wall or to a column, make

sure that the mounting bracket is not warped or deformed.

18

Knockouts

1 1/4 in. 1 1/4 in. 1 in. 1 in.

Conduit size
1/2 in. / 3/4 in. / 1 in.

*

Conduit size
1/2 in. / 3/4 in. / 1 in. / 1 1/4 in.

**

1/2 in. ... DATCOM

3/4 in. - 1 1/4 in. ... AC ~ / DC =

*

*

** **

*

*

*

*

METAL EMPOSSING
Remove parts fallen
into the connection area before
hanging the inverter to the wall
bracket!

** **

METAL EMPOSSING
Remove parts fallen
into the connection
area before hanging the
inverter to the wall
bracket!

EN-US

Safety

General

CAUTION!

Danger of short circuit from loose metal parts from knockouts.

Loose metal parts in the inverter may cause short circuits when the inverter is
powered up. When removing knockouts, make sure that

no loose metal parts fall into the connection area of the inverter,

▶

any metal pieces that do fall into the connection area are removed immedi-

▶

ately.

NOTE!

When using the cable inlets at the back, take care to seal them according to pro­tection class NEMA4X before operating outdoors.

NOTE!

When installing outdoors, only use waterproof conduit fittings and conduits.

Conduit fittings and conduits are not part of the scope of supply for the inverter.

The wall bracket contains several knockouts of different sizes. When knocked
out, the openings are used for the inputs of various wires.

19

1/2 in. for data communication cable (DATCOM)

*

3/4 in.

for AC and DC cables

- 1 1/4
in.
* A grounding electrode terminal (GET) may be required depending on local

regulations.
The cable for the grounding electrode terminal can be fed through the
designated opening on the underside of the wall bracket.

IMPORTANT! The knockouts on the rear of the wall bracket are made of metal.

Knocking or
Drilling Out
Knockouts

IMPORTANT! The knockouts on the underside of the mounting bracket may be

knocked out using a hammer or screwdriver, drilled out using a step drill, or
opened using a hole punch. The side knockouts and the knockouts at the back
may only be drilled out with a step drill or opened with a hole punch.

IMPORTANT! You should only remove the minimum number of knockouts re­quired for the available cables.

Use suitable eye protection when knocking/drilling out the
knockouts.

Only knock out knockouts using a hammer or screwdriver
from the inside outwards.

Only use suitable step drills to drill out the knockouts.
Do not use spiral drills for drilling out!

Only drill out knockouts using a step drill from the outside
inwards.

When drilling out using a step drill, ensure that the inside of
device (e.g. connection block) is not damaged.

When drilling out the knockouts at the back, place the
mounting bracket on an even surface with the back upwards
so that shavings and pieces of metal can fall out of the
mounting bracket.

Attach appropriate conduits to all knocked/drilled out knock­outs.
In the event of installation outside, only use watertight con­duits and conduit fittings.
Conduits and conduit fittings are not included with the in­verter.

If necessary, deburr the number of knockouts required with a
suitable tool.

20

*

*

1 2

EN-US

21

22

AC~

23

24

Suitable Grids

=

~

L1

L2

L3

L2-L3

120°

=

~

L1

L2

L3

N

L2-L3

120°

=

~

L3

L1

L2

N

L1-NL2-N

L2-L3

L3-L1

90°

90°

180°

EN-US

Delta

Setup:
208
240
220
BR
50 Hz

MG 3P
MG 1P

WYE

Setup:
208 N
220 N
BR N
50 HN
HI2

480 N
440 N
50 HN

MG 3N
MG 2N
MG 5N
MG 6

CAL3
HI3

No neutral conductor

Nominal voltage:
208 V
240 V
220 V
220 V
50 Hz 208–240 V

Microgrid 208 V
Microgrid 240 V

Neutral conductor re­quired

Nominal voltage:
208 V
220 V
220 V
50 Hz 208–240 V
208 V

480 V
440 V
50 Hz 415 V

Microgrid 208 V
Microgrid 50 Hz 208–
240 V
Microgrid 50 Hz 480 V
Microgrid 480 V

480 V
480 V

Appropriate inverter:
Symo 10.0-3 208–240 /

12.0-3 208–240 /

15.0-3 208

Appropriate inverter:
Symo 10.0-3 208–240 /

12.0-3 208–240 /

15.0-3 208

Symo 10.0-3 480 /

12.5-3 480 / 15.0-3
480 / 17.5-3 480 /

20.0-3 480 / 22.7-3
480 / 24.0-3 480

Hi-Leg
Delta

Setup:
240 N
50 HN

MG 1N
MG 2N

HI1

Neutral conductor re­quired

Nominal voltage:
240 V
50 Hz 208–240 V

Microgrid 240 V
Microgrid 50 Hz 208–
240 V

208 V

Appropriate inverter:
Symo 10.0-3 208–240 /

12.0-3 208–240

25

Connecting the inverter to the public grid (AC
side)

Safety

WARNING!

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

An electric shock can be fatal.

Prior to all connection work, disconnect the AC and DC supply to the invert-

▶

er.
The DC main switch is used only to switch off power to the power stage set.

▶

When the DC main switch is turned off, the connection area is still energized.
Maintenance and service work on the inverter power stage set should only be

▶

carried out by Fronius-trained service technicians.
All maintenance and service work should only be carried out when the invert-

▶

er and the mounting bracket have been disconnected from each other.
The inverter must only be disconnected from the mounting bracket after be-

▶

ing disconnected from the mains power.
Only an authorized electrician is permitted to connect this inverter to the

▶

public grid.

WARNING!

Inadequately sized electrical components can cause serious injury and damage
to property.

An electric shock can be fatal.

All electrical connections must be made in accordance with the national

▶

standard (e.g., for the US National Electrical Code, ANSI/NFPA 70) and any
other regulations applicable to the installation site.
Use min. 194 °F (90 °C) copper wire for all grounding wires (see NEC table

▶

250.122).
For all AC/DC wires, use a minimum of 167 °F (75 °C).

▶

Voltage drop and other considerations, such as improving power quality, may

▶

mean larger cable cross sections need to be used.

26

WARNING!

Danger from work that is not carried out properly

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

The surge protection device should only be installed and connected by li-

▶

censed electricians.
Observe the safety rules!

▶

Prior to all installation and connection work, disconnect the AC and DC sup-

▶

ply to the inverter.

CAUTION!

Danger due to improperly connected terminals.

This may result in thermal damage to the inverter, which in turn may lead to fires.

When connecting the AC and DC cables, make sure that all terminals are

▶

tightened securely using the proper torque.

NOTE!

Cu / Al Cu

When connecting aluminum cables:

Follow all national and international guidelines regarding the connection of

▶

aluminum cables.
Follow the instructions of the cable manufacturer, especially the note about

▶

whether an annual check to ensure that the cables are firmly attached
should be performed.

NOTE!

Form a min. 4 in. (100 mm) cable loop with all cables.

NOTE!

To ensure that the inverter operates without any problems:

Make sure that the grid's neutral conductor is grounded. For insulated net-

▶

works (without grounding), this is not the case, and operation of the inverter
is not possible.
A neutral conductor is required for measurement purposes when operating

▶

the inverter. The neutral conductor must have a current carrying capacity of
at least 1 A.

EN-US

Permitted
Cables

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

Copper (Cu) or aluminum (Al): round, solid

-

Copper: round, stranded, up to conductor class 4

-

AC & DC = copper cables (Cu)

The following wire combinations can be used for wiring.

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

AWG

roun

4

6

8

10

12

14

AWG
stran

d

ded

2)

2)

2)

2)

2)

2)

4)

6/6

1)

8

10

12

14

8/10

1)

1)

1)

AWG

stranded/round

AWG

round/round

1

)

10/1

12/1

14/1

8/12

)

1

8/14

)

1

1)

0

1)

0

1)

0

2

8/12

)

10/1

1)

2

10/1

1)

4

12/121)12/1

1)

4

14/1

2

14/1

1)

1)

4

10/1

12/1

1)

6

14/1

1)

6

8/10

0

12/1

0

14/1

0

stranded/stranded

2

)

1)

1)

1)

AWG

2

6/12

8/12

10/1

2

6/14

)

)

)

1

8/14

)

10/1

1)

1)

4

12/121)12/1

1)

4

14/1

2

14/1

1)

1)

4

2

1

6/16

)

8/16

)

3

3

10/1

3)

6

12/1

1)

6

14/1

1)

6

27

AC & DC = copper cables (Cu)

The following wire combinations can be used for wiring.

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

AWG

roun

16

AWG

stran

d

ded

3)

16

3)

AWG

stranded/round

AWG

round/round

16/1

1)

4

16/1

1)

6

AWG

stranded/stranded

16/1

0

16/1

3)

1)

2

16/1

1)

4

AC & DC = aluminum cables (Al)

The following wire combinations can be used for wiring.

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

AWG

roun

4

6

8

AWG

stran

d

ded

2)

2)

2)

4)

6

2)

8

8/10

AWG

stranded/round

AWG

round/round

2

)

8/12

)

2

8/14

)

2

8/12

)

2

8/10

AWG

stranded/stranded

2

6/12

2

8/12

)

6/14

)

2

8/14

)

2

)

2

)

16/1

1)

6

6/16

)

8/16

5)

5

10

12

14

16

2)

2)

2)

5)

10

12

14

16

2)

2)

2)

5)

10/1

0

12/1

0

14/1

0

10/1

2)

12/122)12/1

2)

14/1

2)

10/1

2)

2

2)

4

2)

4

14/1

2)

2

2)

4

16/1

2)

4

10/1

12/1

14/1

2)

6

16/1

2)

6

2)

0

2)

0

14/1

2)

0

16/1

5)

0

10/1

2

10/1

2)

2)

4

12/122)12/1

2)

4

14/1

2

16/1

2

14/1

2)

2)

4

16/1

2)

2)

4

1)

2)

3)

4)

5)

tested and inspected as per UL

not inspected as per UL; connection possible

with ferrules only

use stranded PV (ZKLA) or 2-wire

not inspected as per UL; connection possible; AWG 16 with ferrules only

Minimum AWG as per NEC

10/1

5)

6

12/1

2)

6

14/1

2)

6

16/1

2)

6

10.0-3 208-240 12.0-3 208-240

28

15.0-3 208

Copper (Cu)/aluminum
(Al)

208 V

C

220 V

C

AWG 10/AWG 10 AWG 10/AWG 8 AWG 8/AWG 6

A

AWG 10/AWG 10 AWG 10/AWG 8

A

EN-US

240 V

C

AWG 12/AWG 10 AWG 10/AWG 10

A

10.0-3 480 12.5-3 480 15.0-3 480

Copper (Cu)/aluminum
(Al)

440 V

AC

480 V

AC

AWG 14/AWG 12 AWG 14/AWG 12 AWG 14/AWG 12

AWG 14/AWG 12 AWG 14/AWG 12 AWG 14/AWG 12

17.5-3 480 20.0-3 480 22.7-3 480

440 V

Copper (Cu)/aluminum
(Al)

AC

480 V

AC

24.0-3 480

Copper (Cu)/aluminum

480 VACAWG 10/AWG 10

AWG 12/AWG 10 AWG 10/AWG 10 AWG 10/AWG 8

AWG 14/AWG 12 AWG 12/AWG 10 AWG 10/AWG 10

(Al)

Preparing Alu­minum Cables
for Connection

The AC-side terminals are designed for connecting single-wire, round aluminum
cables. Due to the reaction of aluminum with air that creates a tough, non-con­ductive oxide layer the following points must be considered when connecting alu­minum cables:

Reduced rated currents for aluminum cables

-

The connection requirements listed below

-

Always follow the instructions of the cable manufacturer when using aluminum
cables.

Take into account local specifications when configuring cable cross sections.

Connection Requirements:

Carefully clean off the oxide layer of the stripped end of the cable, e.g., using

1

a knife

IMPORTANT! Do not use brushes, files, or sandpaper; aluminum particles may
get stuck and can transfer to other cables.

After removing the oxide layer of the cable end, rub in a neutral grease, e.g.,

2

acid-free and alkali-free Vaseline

Then immediately connect it to the terminal

3

IMPORTANT!Repeat the steps above whenever the cable is disconnected and

then reconnected.

29

Monitoring the

Fronius Symo

15.0-3 208

0.6 in. (15 mm)

AC
~

PE

PE

1

OFF

PEPE

Torque (Nm /
lbf.in.) → see
printing near
wire terminal

PE

grid

The resistance in the leads to the AC-side connection terminals must be as low
as possible for optimal functioning of grid monitoring.

Fronius Symo

15.0-3 208 – fer­rite ring

Connecting the
Inverter to the
Public Grid (AC)

1

With Fronius Symo 15.0-3 208, the
three phases and neutral conductor
must be fed through a ferrite ring. The
ferrite ring is included in the scope of
delivery for the inverter.
The ground conductor (PE) must not
be fed through the ferrite ring.

Fronius Symo 15.0-3 208

NOTE!

To ensure a proper ground connection, all grounding terminals GND must be
tightened with the specified torque during installation.

NOTE!

Form loops of at least 4 in. (102 mm) in the AC cables when connecting them to
the AC terminals.

IMPORTANT! The ground conductor GND of the AC cable must be laid so that it

is disconnected last.
Measure the ground conductor GND longer, for example, and loop.

1

2

30

max. 80 A

AC ~

RCD

National Standards

?

Type A

YES

I∆N ≥ 100 mA

§

3

EN-US

If AC cables are laid over the shaft of
the DC main switch or across the DC
main switch connection block, the
cables may be damaged when the in­verter is pivoted or the inverter may
not be able to be pivoted.

Maximum AC
fuse protection

IMPORTANT! Do not lay AC cables over the shaft of the DC main switch or

across the DC main switch connection block!

If excessively long AC or DC cables are
laid in loops in the connection area, fix
the cables to the designated eyelets at
the top and bottom of the connection
block using cable ties.

Power circuit breaker

31

max. 80 A

AC ~

RCD

National Standards

?

Type A

YES

I∆N ≥ 100 mA

§

Inverter Phases AC power Maximum fuse protec-

max. C 80 A

AC ~

RCD

National Standards

?

Type A

YES

I∆N ≥ 100 mA

§

tion

Fronius Symo 10.0-3
208-240

Fronius Symo 12.0-3
208-240

Fronius Symo 10.0-3 480 3+N 10,000 W C 80 A

Fronius Symo 12.5-3 480 3+N 12,500 W C 80 A

Fronius Symo 15.0-3 480 3+N 15,000 W C 80 A

Fronius Symo 15.0-3 208 3+N 15,000 W C 80 A

Fronius Symo 17.5-3 480 3+N 17,500 W C 80 A

Fronius Symo 20.0-3 480 3+N 20,000 W C 80 A

Fronius Symo 22.7-3 480 3+N 22,700 W C 80 A

Fronius Symo 24.0-3 480 3+N 24,000 W C 80 A

RCCB

3+N 10,000 W C 80 A

3+N 12,000 W C 80 A

32

NOTE!

A residual current circuit breaker for the AC connecting cable may be required
depending on local regulations, the grid operator, and other conditions.

A type A residual current circuit breaker with a trip current of at least 100 mA is
generally sufficient in this case. However, false alarms can be triggered for the
residual current circuit breaker type A in individual cases and depending on local
conditions. For this reason, Fronius recommends that you use a residual current
circuit breaker suitable for frequency converters.

EN-US

Additional ex­ternal AC and/or
DC disconnect

Depending on the installation, an additional external AC and/or DC disconnect
may be required if the inverter is installed in a location not easily accessible to
utility or fire personnel. Contact your local authorities for additional information.

33

34

DC=

35

36

Notes on the Multi-MPP Tracker inverter

DC-1

PV 1PV 1

PV 2

DC+1

DC-2

DC+2

max 33 A to a single
DC terminal

1

DC+1 DC+2

DC-

2

1 2 3 4 5 6

3 1 2 3

+1 +2

DC+1

DC-1

PV 1

PV 2

10.0-3, 12.0-3 max. 43,5A

15.0-3,17.5-3,20.0-3 max 51A

BASIC

MPP TRACKER 2

OFF

DC+

DC-

42,0201,4479

42,0201,4480

EN-US

Multi MPP
Tracker – Invert­er

Connecting two solar module fields to a Multi
MPP Tracker inverter

Multi MPP Tracker inverters have two
independent DC inputs (MPP Tracker).
These inputs can be connected to a
number of different modules.
Each MPP Tracker has 3 DC+ termin­als. There are a total of six DC- termin­als.

Connecting two–six strings in Multi
MPP Tracker mode:
Connect the strings separately to the
two MPP Tracker inputs (DC+1/DC+2).
The DC- terminals can be used as de­sired, since they are connected intern­ally.
Set MPP TRACKER 2 to "ON" when
starting for the first time (also sub­sequently possible in the basic menu)

Single MPP Tracker mode on a Multi
MPP Tracker inverter:

If the inverter is being operated with
an external string collection box, the
DC connector kit (item numbers
42,0201,4479 and 42,0201,4480) must
be used

Connecting multiple combined solar module
fields to a line on a Multi MPP Tracker inverter

Set MPP TRACKER 2 to "OFF" when
starting for the first time (also sub­sequently possible in the basic menu)

If the Multi MPP Tracker inverter is op­erated in Single MPP Tracker mode,
the currents of the connected DC lines
are distributed evenly across both in­puts.

37

Connecting solar module strings to the inverter

Safety

WARNING!

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

An electric shock can be fatal.

Prior to all connection work, disconnect the AC and DC supply to the invert-

▶

er.
The DC main switch is used only to switch off power to the power stage set.

▶

When the DC main switch is turned off, the connection area is still energized.
Maintenance and service work on the inverter power stage set should only be

▶

carried out by Fronius-trained service technicians.
All maintenance and service work should only be carried out when the invert-

▶

er and the mounting bracket have been disconnected from each other.
The inverter must only be disconnected from the mounting bracket after be-

▶

ing disconnected from the mains power.
Only an authorized electrician is permitted to connect this inverter to the

▶

public grid.

WARNING!

Inadequately sized electrical components can cause serious injury and damage
to property.

An electric shock can be fatal.

All electrical connections must be made in accordance with the national

▶

standard (e.g., for the US National Electrical Code, ANSI/NFPA 70) and any
other regulations applicable to the installation site.
Use min. 194 °F (90 °C) copper wire for all grounding wires (see NEC table

▶

250.122).
For all AC/DC wires, use a minimum of 167 °F (75 °C).

▶

Voltage drop and other considerations, such as improving power quality, may

▶

mean larger cable cross sections need to be used.

38

WARNING!

Danger from work that is not carried out properly

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

The surge protection device should only be installed and connected by li-

▶

censed electricians.
Observe the safety rules!

▶

Prior to all installation and connection work, disconnect the AC and DC sup-

▶

ply to the inverter.

CAUTION!

Danger due to improperly connected terminals.

This may result in thermal damage to the inverter, which in turn may lead to fires.

When connecting the AC and DC cables, make sure that all terminals are

▶

tightened securely using the proper torque.

CAUTION!

Danger due to overloading on the inverter.

This may result in damage to the inverter.

Observe the maximum current carrying capacity of the various power cat-

▶

egories (see Table A).
Only connect a maximum of 33 A to each DC terminal.

▶

Connect the DC+ and DC- cables to the correct DC+ and DC- terminals on

▶

the inverter.
Observe the maximum DC input voltage.

▶

Table A

Power category Maximum current car-

rying capacity
MPP1 / MPP2

10.0-3 208–240/12.0-3 208–240/10.0-3 480/12.5-3
480

15.0-3 208 50 A

15.0-3 480/17.5-3 480/20.0-3 480/22.7-3
480/24.0-3 480

NOTE!

25 A / 16.5 A

33 A / 25 A

EN-US

Solar modules exposed to light supply current to the inverter.

NOTE!

When using the cable inlets at the back, take care to seal them according to pro­tection class NEMA4X before operating outdoors.

NOTE!

When connecting aluminum cables:

follow all national and international guidelines regarding the connection of

▶

aluminum cables
follow the instructions of the cable manufacturer

▶

perform an annual check to ensure that the cables are firmly attached ac-

▶

cording to the proper torque

NOTE!

When connecting DC cables, ensure the polarity is correct.

NOTE!

Form a min. 4 in. (100 mm) cable loop with all cables.

String fuses Only applies to device type Fronius Symo 15.0-3 208 and device types Fronius

Symo 15.0-3 480 / 20.0-3 480 / 22.7-3 480 / 24.0-3 480 with the "Ecofuse" op­tion:

39

The use of string fuses in the Fronius Symo provides additional fuse protection

Cu / Al Cu

for solar modules.
The maximum short circuit current ISC, the maximum module backfeed current

IR and the specification of the maximum string fuse value in the module data
sheet of the respective solar module are decisive factors in the protection of the

solar module.

The maximum short circuit current ISC per terminal is 15 A.

The string fuse release current can be set to greater than 15 A if required.
However, a release current of 20 A must not be exceeded.

If the inverter is being operated with an external string collection box, the DC
connector kit 25 (item numbers 42,0201,4479 for DC+ and 42,0201,4480 for
DC-) must be used. In this case the solar modules are externally protected in the
string collection box and the metal bolts should be used in the inverter.

National regulations regarding fuse protection must be observed. The electrical
engineer carrying out the installation is responsible for the correct choice of
string fuses.

CAUTION!

Danger due to defective fuses.

This can result in fires.

Always replace defective fuses with new equivalent fuses.

▶

Permitted
Cables

The inverter is delivered with metal bolts as standard.

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

40

Copper (Cu) or aluminum (Al): round, solid

-

Copper: round, stranded, up to conductor class 4

-

AC & DC = copper cables (Cu)

The following wire combinations can be used for wiring.

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

AWG

roun

4

6

8

10

12

14

16

AWG

stran

d

ded

2)

2)

2)

2)

2)

2)

3)

4)

6/6

1)

8

10

12

14

16

8/10

1)

1)

1)

3)

AWG

stranded/round

AWG

round/round

1

)

10/1

12/1

14/1

16/1

8/12

)

1

8/14

)

1

1)

0

1)

0

1)

0

2

8/12

)

10/1

1)

2

10/1

1)

4

12/121)12/1

1)

4

14/1

2

14/1

1)

1)

4

1)

4

10/1

12/1

1)

6

14/1

1)

6

16/1

1)

6

8/10

0

12/1

0

14/1

0

16/1

0

stranded/stranded

2

)

1)

1)

1)

3)

AWG

2

6/12

8/12

10/1

2

6/14

)

)

)

1

8/14

)

10/1

1)

1)

4

12/121)12/1

1)

4

14/1

2

16/1

2

14/1

1)

1)

4

16/1

1)

1)

4

EN-US

2

1

6/16

)

8/16

)

3

3

10/1

3)

6

12/1

1)

6

14/1

1)

6

16/1

1)

6

AC & DC = aluminum cables (Al)

The following wire combinations can be used for wiring.

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

AWG

roun

4

6

8

10

12

14

16

AWG

stran

d

ded

2)

2)

2)

2)

2)

2)

5)

4)

6

2)

8

10

12

14

16

8/10

2)

2)

2)

5)

AWG

stranded/round

AWG

round/round

2

)

10/1

12/1

14/1

16/1

8/12

)

2

8/14

)

2

2)

0

2)

0

2)

0

2

8/12

)

10/1

2)

2

10/1

2)

4

12/122)12/1

2)

4

14/1

2

14/1

2)

2)

4

2)

4

10/1

12/1

14/1

2)

6

16/1

2)

6

8/10

0

0

14/1

0

16/1

0

AWG

stranded/stranded

2

6/12

2

8/12

)

10/1

2)

2

6/14

)

2

8/14

)

10/1

2)

4

12/122)12/1

2)

14/1

2)

2)

2

16/1

5)

2)

2

4

14/1

4

16/1

4

2

)

2

)

2)

2)

2)

2)

6/16

)

8/16

5)

10/1

5)

6

12/1

2)

6

14/1

2)

6

16/1

2)

6

5

41

1)

2)

3)

4)

5)

tested and inspected as per UL

not inspected as per UL; connection possible

with ferrules only

use stranded PV (ZKLA) or 2-wire

not inspected as per UL; connection possible; AWG 16 with ferrules only

Minimum AWG as per NEC

10.0-3 208-240 12.0-3 208-240

Copper (Cu)/aluminum
(Al)

208 V

C

220 V

C

240 V

C

AWG 10/AWG 10 AWG 10/AWG 8

A

AWG 10/AWG 10 AWG 10/AWG 8

A

AWG 12/AWG 10 AWG 10/AWG 10

A

15.0-3 208

AWG 8/AWG 6

10.0-3 480 12.5-3 480 15.0-3 480

440 VACAWG 14/AWG 12 AWG 14/AWG 12 AWG 14/AWG 12

Copper (Cu)/aluminum
(Al)

480 VACAWG 14/AWG 12 AWG 14/AWG 12 AWG 14/AWG 12

17.5-3 480 20.0-3 480 22.7-3 480

440 VACAWG 12/AWG 10 AWG 10/AWG 10 AWG 10/AWG 8

Copper (Cu)/aluminum
(Al)

480 VACAWG 14/AWG 12 AWG 12/AWG 10 AWG 10/AWG 10

24.0-3 480

Copper (Cu)/aluminum

480 VACAWG 10/AWG 10

(Al)

General Inform­ation about Solar
Modules

In order to select suitable solar modules, observe the following points:

The open circuit voltage of the solar modules increases as the temperature

-

decreases, assuming constant irradiance. The open circuit voltage may not
exceed the following values, depending on the altitude:

Symo 10.0-3 – 12.0-3 208–240

0 to 11,154 ft. (0 to 3400 m) = 600 V

Symo 10.0-3 – 24.0-3 480

0 to 6561 ft. (0 to 2000 m) = 1000 V

6531 to 8202 ft. (2000 to 2500 m) = 950 V

8202 to 9842 ft. (2500 to 3000 m) = 900 V

42

9842 to 11,154 ft. (3000 to 3400 m) = 850 V

If the open circuit voltage exceeds the values stated above, the inverter may

-

be damaged and all warranty rights will become null and void as the inverter
records the last DC voltage in the system meaning that non-compliance with
the maximum permitted limits can be checked.
Note the temperature coefficients in the solar module data sheet

-

More exact data for sizing the solar modules for the particular location can

-

be obtained using calculation tools such as the Fronius Solar.creator (creat-

or.fronius.com).

See NEC table 690.7 for the appropriate voltage adjustment factor for crys-

-

talline silicon solar modules, or use the manufacturer's specified voltage
coefficients.

NOTE!

Before connecting solar modules, make sure that the voltage specified by the
manufacturer corresponds to the actual measured voltage.

Note the safety instructions and specifications of the solar module manufac-

▶

turer regarding solar module grounding.

EN-US

Connecting Alu­minum Cables

The DC-side terminals are designed for connecting single-wire, round aluminum
cables. Due to the reaction of aluminum with air that creates a tough, non-con­ductive oxide layer the following points must be considered when connecting alu­minum cables:

Reduced rated currents for aluminum cables

-

The connection requirements listed below

-

Notice! Always follow the instructions of the cable manufacturer when using alu­minum cables.

Notice! Take into account local specifications when configuring cable cross sec­tions.

Connection Requirements:

Carefully clean off the oxide layer of the stripped end of the cable, e.g. using

1

a knife

IMPORTANT! Do not use brushes, files, or sandpaper; aluminum particles may
get stuck and can transfer to other cables.

After removing the oxide layer of the cable end, rub in a neutral grease, e.g.,

2

acid-free and alkali-free Vaseline

Then immediately connect it to the terminal

3

IMPORTANT! Repeat the steps above whenever the cable is disconnected and

then reconnected.

43

Connecting Sol-

D1

D2

D3

D1

D1

D1

0.59 in.
(15 mm)

2.76 in.(70 mm)

> AWG 10
(6 mm²)

AWG 14 ... AWG 6 copper direct

AWG 6 aluminum direct

AWG 4 copper or aluminum with
input combiner

6-35 mm² / 10-2 AWG / Al/Cu

5.5 Nm / 50 lbf.in

option

DC+

DC-

42,0201,4479

42,0201,4480

10.0-3, 12.0-3 208-240 / 10.0-3, 12.5-3 480 max. 41,5 A

15.0-3, 17.5-3, 20.0-3, 22.7-3, 24.0-3 480 max 51 A

12x 1.8 Nm / 16 lbf.in

BASIC

MPP TRACKER 2

OFF

Torque (Nm / lbf.in.)
→ see printing near wire terminal

ar Module
Strings to the In­verter

CAUTION!

Danger due to incorrectly connected PV cables and voltage from the solar mod­ules

This can result in damage to the inverter.

Check the polarity and voltage of the solar module strings before connec-

▶

tion. The voltage must not exceed the following values:

Symo 10.0-3 - 12.0-3 208-240

0-11,154 ft (0- 3400 m) = 600 V

Symo 10.0-3 - 24.0-3 480

0-6561 ft (0-2000 m) = 1000 V
6531- 8202 ft (2000-2500 m) = 950 V
8202-9842 ft (2500-3000 m) = 900 V
9842-11,154 ft (3000-3400 m) = 850 V

1

3

2

4

44

5

10.0-3 - 12.0-3 208-240

U

DC max

0 - 11154 ft.
(0 - 3400 m)

ft. (m)

600 V

1000 V

0 - 6561 ft.
(0 - 2000 m)

> 8202 - 9842 ft.
(> 2500 - 3000 m)
> 6561 - 8202 ft.
(> 2000 - 2500 m)

> 9842 - 11154 ft.
(> 3000 - 3400 m)

950 V

900 V

850 V

U

DC max

ft. (m)

10.0-3 - 24.0-3 480

6

EN-US

If DC cables are laid over the shaft of
the DC main switch or across the DC
main switch connection block, the
cables may be damaged when the in­verter is pivoted or the inverter may
not be able to be pivoted.

IMPORTANT! Do not lay DC cables
over the shaft of the DC main switch
or across the DC main switch connec­tion block!

45

46

Laying Solar.Net Cables

47

48

Data communication

22 lbf.in

2.5 Nm

EN-US

Lay data com­munication
cables

1

3 4

2

5

6

49

7

IMPORTANT! If data communication cables are wired into the inverter, observe

the following points:

Provide separate conduits for data communication cables

-

Lay data communication cables in the supplied conduit

-

Knock out the appropriate opening

-

Cleanly deburr the knocked-out opening

-

Clip the inverter onto the mounting bracket

-

Guide the data communication cables through the cable glands from behind

-

When pivoting the inverter, ensure that the cables are not trapped, kinked, or

-

damaged in any other way. Do not loop the data communication cables.
Lay the data communication cables in the data communication area of the

-

inverter and connect to the Solar.Net “IN” and “OUT” connections.
Plug the termination plugs into the remaining Solar.Net connections.

Installing
Datamanager in
the Inverter

WARNING!

Danger of residual voltage from capacitors.

An electric shock can be fatal.

Wait until the capacitors have discharged. Discharge takes 5 minutes.

▶

WARNING!

An inadequate ground conductor connection can cause serious injury and dam­age to property.

The housing screws provide an adequate ground conductor connection for

▶

grounding the housing and should not be replaced under any circumstances
by other screws that do not provide a reliable ground conductor connection.

IMPORTANT! Follow general ESD guidelines when handling option cards.

IMPORTANT! Only one Fronius Datamanager in master mode is permitted per

Fronius Solar.Net Ring. Switch other Fronius Datamanagers to slave mode or re­move them.
Unused option card slots can be closed by replacing the cover (item number
42,0405,2094), or an inverter without Fronius Datamanager (light version) can be
used.

50

IMPORTANT! Only knock out one opening for the PC board when installing a
data manager in the inverter.

1 2

1

TX20

10.6 lbf.in

1.2 Nm

1

2

EN-US

3

4

5

51

52

Finally...

53

54

Seal Conduits

Conduit

Conduit

AC~

Condensation

Air circulation

InsideOutside

DC=

Conduit

Conduit

AC~

InsideOutside

DC=

4

1

3

2

Permanently elastic sealant

Conduit

Inverter housing

Conduit fitting

Permanently elastic
sealant

1

1

Seal all used conduits!
Seal every incoming and every outgoing conduit!
Seal both conduit ends!

1

NOTE!

Condensation in the conduits can
damage the inverter or the photovol­taic system components.

To avoid undesirable air circulation and
condensation in the conduits:

seal all conduits in use with a per-

▶

manently elastic sealant
seal every incoming and outgoing

▶

conduit
seal both conduit ends.

▶

EN-US

55

Clipping the Inverter onto the Mounting Bracket

Clipping the In­verter onto the
Mounting Brack­et

WARNING!

Danger due to inadequate ground conductor connection.

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

The housing screws provide an adequate ground conductor connection for

▶

grounding the housing and should not be replaced under any circumstances
by other screws that do not provide a reliable ground conductor connection.

Due to the high weight, two people are required to clip the inverter into the
mounting bracket.

NOTE!

The inverter is fitted with a lock for safety reasons, which allows the inverter to
be pivoted in the mounting bracket only when the DC main switch is off.

Only clip on and pivot the inverter in the mounting bracket when the DC

▶

main switch is off.
Do not use excessive force to clip on the inverter and pivot it.

▶

The fixing screws in the data communication area of the inverter are used to fix
the inverter to the mounting bracket. Fixing screws must be properly tightened
to ensure correct contact between the inverter and the mounting bracket.

CAUTION!

Danger due to improperly tightened fixing screws.

When the inverter is in operation, this can result the formation of arcs, which in
turn may lead to fires.

Always tighten the fixing screws with the specified torque.

▶

Use a torque screwdriver to insert the
screws into the inverter. Do not use a
conventional cordless screwdriver –
the tightening torque will not be suffi­ciently accurate.

Before attaching the Datcom cover, check the seals on the back for damage. If
there is damage, replacement covers (DatCom Cover Upgrade Kit) must be
ordered.

56

4.3 in.

ON

OFF

Lock

22.1 lbf.in / 2.5 Nm

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1

3 4

2

57

22.1 lbf.in

2.5 Nm

5

AC

ON

2

ON

OFF

Lock

1

6

7

58

Using for the first time

1

2

Select Countr

y

1

2

50 Hz
International 50 Hz

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Using the Invert­er for the First
Time

1

WARNING!

Danger from incorrect operation and work that is not carried out properly.

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

Only qualified staff are authorized to commission the inverter and only with-

▶

in the scope of the respective technical regulations.
Read the Installation Instructions and Operating Instructions before install-

▶

ation and commissioning.

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

If setup is stopped before it is completed, it can be started again via an AC reset.
An AC reset can be carried out by switching the automatic circuit breaker off
and on again.

The country setup can only be set when starting the inverter for the first time. If
the country setup needs to be changed at a later date, contact your technical
support.

2

* Country setup examples

The available country setups may change during a software update. Therefore, the following list may
not exactly match the display on the inverter.

Setups:
Symo 208 – 240

240N (with NL-Mon)
240 (without NL-Mon)
208N (with NL-Mon)
208 (without NL-Mon)
220N (with NL-Mon)
220 (without NL-Mon)
50 HZ
50 HN (with NL-Mon)
BR N (Brazil 220 V with NL­Mon)
BR (Brazil 220 V without NL­Mon)
HI1 (Hawaii 240 V with NL-Mon)
HI2 (Hawaii 208 V with NL-Mon)

Symo 208 – 240

MG1N* (Microgrid 240V with
NL-Mon)
MG1P* (Microgrid 240 V
without NL-Mon)
MG2N* (Microgrid 220V
without NL-Mon)
MG3N* (Microgrid 208 V
without NL-Mon)
MG3P* (Microgrid 208 V
without NL-Mon)

Symo 480

480N (with NL-Mon)
440N (with NL-Mon)
50HN (with NL-Mon)
CAL3 (California 480 V with
NL-Mon)
HI3 (Hawaii with NL-Mon)
MG5N* (Microgrid 240 V with
NL-Mon)
MG6* (Microgrid)

59

* For more information about "Field Adjustable Trip Points" and "Special Purpose Utility-Interact-

CONFIG

Loading Country Setup

6x

7x

1

2

4x

5x

1

2

SETUP

Auto Daylightsaving

1

2

BASIC

MPP TRACKER 2

1

2

ive" see

www.fronius.com/QR-link/42042102339

3

6

9

4

7 8

5

60

Options

61

62

USB Stick as a Data Logger and for Updating In­verter Software

USB Flash Drive
as a Data Logger

Data on the USB
stick

A USB flash drive connected to the USB A socket can act as a data logger for an
inverter.

The logging data that is saved on the USB flash drive can be viewed directly in
third-party applications (e.g., Microsoft® Excel) at any time via the included CSV
file.

Older Excel versions (up to Excel 2007) have a row limit of 65536.

If the USB stick is used as a datalogger, three files are automatically created:

FRONIUS.sys system file:

-

This file saves information from the inverter that is irrelevant to the custom­er. The file must not be deleted individually. Only delete all files together
(sys, fld, csv).

DALO.fld log file:

-

Log file for reading out data in Fronius Solar.access.

EN-US

You can find additional information on the Fronius Solar.access Software in
the "DATCOM Detail" operating instructions at http://www.fronius.com

DATA.csv log file:

-

A log file for reading out data in a spreadsheet program (e.g., Microsoft® Ex­cel)

(1) USB root directory
(2) Fronius inverter (Fronius Galvo,

Fronius Symo, Fronius Primo, or
Fronius Eco)

(3) Inverter number – can be set in

the setup menu under DATCOM

If multiple inverters exist with the
same inverter number, the three files
are saved in the same folder. A number
is appended to the file name (e.g.,

DALO_02.fld)

Data structure on the USB stick

63

Structure of the CSV file:

(1) (2) (3)

(4)

(5) (6) (7)

(8)

(9)

(1) ID
(2) Inverter no.
(3) Inverter type (DATCOM code)
(4) Logging interval in seconds
(5) Energy in watt-seconds with reference to the logging interval
(6) Inductive reactive power
(7) Capacitive reactive power
(8) Averages over the logging interval (AC voltage, AC current, DC voltage,

DC current)

(9) Additional information

Data Amount
and Memory Ca-

One USB thumb drive with a memory capacity of 1 GB, for example, can record
logging data at a logging interval of 5 minutes for approx. 7 years.

pacity

CSV file

CSV files can store only 65,535 rows (data records) (up to Microsoft® Excel ver­sion 2007, afterwards there is no limit).
At a logging interval of 5 minutes, the 65,535 rows are written within approx. 7
months (CSV data size of approx. 8 MB).
To avoid a loss of data, the CSV file should be backed up to a PC within these
7 months and deleted from the USB thumb drive. If the logging interval is set
longer, this time frame is extended accordingly.

FLD file

The FLD file should not be larger than 16 MB. At a logging interval of 5 minutes,
this corresponds to a storage duration of approx. 6 years.
If the file exceeds this 16 MB limit, it should be backed up to a PC, and all data
should be deleted from the USB thumb drive.

After you have backed up the data and removed it from the USB thumb drive,
the thumb drive should be immediately reinserted so that it can record logging
data; no further steps are required.

Notice! A full USB thumb drive can lead to loss of data or overwriting of data.
When inserting the USB thumb drive, make sure that it has a sufficient memory
capacity.

64

NOTE!

Risk from a full USB thumb drive.

This can result in the loss of data or data being overwritten.

When inserting the USB thumb drive, make sure that it has a sufficient

▶

memory capacity.

Buffer Memory If the USB flash drive is removed (e.g., to back up data), the logging data is writ-

ten to a buffer memory in the inverter.
As soon as the USB flash drive is reinserted, the data is automatically transferred
from the buffer memory to the USB flash drive.

The buffer memory can store a maximum of 6 logging points. Data is logged only
during inverter operation (power greater than 0 W). The logging interval is set to
30 minutes. This results in a time span of 3 hours for recording data in the buffer
memory.

When the buffer memory is full, the oldest data in the buffer memory is written
over with the new data.

IMPORTANT! The buffer memory requires a constant power supply.
If there is an AC power outage during operation, all data in the buffer memory is
lost. The automatic night switch-off must be deactivated so that data is not lost
at night (set “Night Mode” setup parameter to ON – see the Operating Instruc­tions for Datamanager 2.0 and the sections “Setting and Displaying Menu Items,”
“Displaying and Setting Parameters in the ‘DATcom’ Menu Item”).
For Fronius Eco or Fronius Symo 15.0-3 208, the buffer memory also works with
pure DC voltage.

EN-US

Suitable USB
Thumb Drives

Due to the number of USB thumb drives on the market, we cannot guarantee
that every USB thumb drive will be recognized by the inverter.

Fronius recommends using only certified, industrial USB thumb drives (look for
the USB-IF logo).

The inverter supports USB thumb drives using the following file systems:

FAT12

-

FAT16

-

FAT32

-

Fronius recommends that the USB thumb drive only be used for recording log­ging data or for updating the inverter software. USB thumb drives should not
contain any other data.

65

USB symbol on the inverter display, e.g., in the 'NOW' display mode:

AC Output Power

NOW

When the inverter recognizes a USB
thumb drive, the USB symbol will ap­pear at the top right of the display.

When inserting the USB thumb drive,
make sure that the USB symbol is dis­played (it may also be flashing).

Notice! Please be aware that in outdoor applications the USB thumb drive may
only function in a limited temperature range.
Make sure, for example, that the USB thumb drive will also function at low tem­peratures for outdoor applications.

USB Stick for
Updating Invert­er Software

Removing the
USB Stick

The USB stick can be used to help end customers update inverter software via
the USB menu item in the SETUP menu item: the update file is first saved on the
USB stick and then transferred to the inverter. The update file must be saved in
the USB stick root directory.

Safety information for removing a USB stick

IMPORTANT! To prevent a loss of

data, the connected USB stick
should only be removed under the
following conditions:

via the SETUP and "Safely re-

-

move USB / hardware" menu
items
when the "Data Transfer" LED is

-

no longer flashing or illuminated.

66

Options

NO MOUNTING

EN-US

Options

OPTION 'Shade­Cover'

NOTE!

A DIN rail is provided in order to
mount accessory electrical devices in­cluding, but not limited to, overcur­rent protection, metering, radio or cel­lular modem.

Maximum size for mounting of all
devices is 4 w x 4.75 l x 2.59 inches.
The installer takes responsibility for
any undesired effect on the inverter by
installing an electrical device in this
area. Caution should be taken when in­stalling a device that may output signi­ficant amounts of heat or radio inter­ference. Always ensure that the device
does not inhibit the inverter from clos­ing and sealing properly. Any questions
about device eligibility should be direc­ted toward technical support.

Use the ShadeCover when the in-

-

verter is exposed to direct sunlight
Use 4 screws for proper mounting

-

67

68

Care and maintenance

69

70

Notes on Maintenance

Maintenance Notice! For a horizontal installation position and installation outside: perform an

annual check to ensure that all screw connections are tightly fastened.

Maintenance and service work may only be carried out by Fronius-trained service
technicians.

Cleaning Wipe the inverter, if necessary, with a damp cloth.

Do not use cleaning agents, scouring agents, solvents, or similar products to
clean the inverter.

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71

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