FoxESS F-G2 Series User manual

User Manual
This guide describes how to use the inverter. In order to prevent improper
operation before use, please carefully read this manual.
F-G2 SERIES

Table of Contents
1. Important Notes ......................................................................................................................... 1
1.1 Scope ................................................................................................................................. 1
1.2 Target Group ...................................................................................................................... 1
1.3 Symbols Used .................................................................................................................... 1
1.4 Symbols Explanation ......................................................................................................... 1
2. Safety ......................................................................................................................................... 2
2.1 Appropriate Usage ............................................................................................................. 2
2.2 PE Connection and Leakage Current ............................................................................... 3
2.3 Surge Protection Devices (SPDs) for PV Installation ....................................................... 4
3. About Product ............................................................................................................................ 4
3.1 About Inverter .....................................................................................................................4
3.2 Basic Features ................................................................................................................... 4
3.3 Terminals Introduction ........................................................................................................5
3.4 Dimensions ........................................................................................................................ 5
4. Technical Data ........................................................................................................................... 6
4.1 DC Input ............................................................................................................................. 6
4.2 AC Output ...........................................................................................................................6
4.3 Efficiency, Safety and Protection ....................................................................................... 7
4.4 General Data ......................................................................................................................8
5. Installation ..................................................................................................................................9
5.1 Packing List ........................................................................................................................9
5.2 Preparation .........................................................................................................................9
5.3 Installation Space Required .............................................................................................10
5.4 Tools Required ................................................................................................................. 10
5.5 Installation Steps ..............................................................................................................10
5.6 Wiring Steps ..................................................................................................................... 11
5.7 Earth Connection ............................................................................................................. 14
5.8 Communication Device Installation (Optional) ................................................................14
5.9 Inverter Start-Up .............................................................................................................. 19
5.10 Auto-test ........................................................................................................................... 21
5.11 Inverter Switch Off ....................................................................................................... 21
6. Operation ................................................................................................................................. 22
6.1 Control Panel ................................................................................................................... 22
6.2 Function Tree ................................................................................................................... 23
7. Maintenance ............................................................................................................................ 24
7.1 Alarm List ......................................................................................................................... 24
7.2 Troubleshooting ............................................................................................................... 26
7.3 Routine Maintenance .......................................................................................................26
8. Decommissioning .................................................................................................................... 27
8.1 Dismantling the Inverter ...................................................................................................27
8.2 Packaging ........................................................................................................................ 27
8.3 Storage and Transportation ............................................................................................. 27

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1. Important Notes
1.1 Scope
This manual describes the assembly, installation, commissioning, maintenance and troubleshooting of the
following model(s) of Fox products:
F3000-G2 F3600-G2 F4600-G2
F5000-G2 F5300-G2* F6000-G2
Note: Please keep this manual where it will be accessible at all times. *India only
1.2 Target Group
This manual is for qualified personnel only. The tasks described in this manual will need to be performed by
professional, suitably qualified technicians only.
1.3 Symbols Used
The following types of safety instructions and general information appear in this document as described
below:
Danger!
“Danger” indicates a hazardous situation which, if not avoided, will result in death or serious
injury.
Warning!
“Warning” indicates a hazardous situation which, if not avoided, could result in death or
serious injury.
Caution!
“Caution” indicates a hazardous situation which, if not avoided, could result in minor or
moderate injury.
Note!
“Note” provides important tips and guidance.
1.4 Symbols Explanation
This section explains the symbols shown on the inverter and on the type label:
Symbols
Explanation
Symbol Explanation CE mark. The inverter complies with the requirements of the applicable CE
guidelines.
This mark indicates compound UK product safety certification requirements.
Beware of hot surface. The inverter can become hot during operation. Avoid contact during
operation.
Danger of high voltages.
Danger to life due to high voltages in the inverter!

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Danger.
Risk of electric shock!
Danger to life due to high voltage.
There is residual voltage in the inverter which needs 5 min to discharge.
Wait 5 min before you open the upper lid or the DC lid.
Read the manual.
Product should not be disposed as household waste.
PE conductor terminal
2. Safety
2.1 Appropriate Usage
This series inverter is designed and tested in accordance with international safety requirements. However,
certain safety precautions must be taken when installing and operating this inverter. The installer must read
and follow all instructions, cautions and warnings in this installation manual.
- All operations including transport, installation, start-up and maintenance, must be carried out by qualified,
trained personnel.
- The electrical installation & maintenance of the inverter shall be conducted by a licensed electrician and
shall comply with local wiring rules and regulations.
- Before installation, check the unit to ensure it is free of any transport or handling damage, which could
affect insulation integrity or safety clearances. Choose the installation location carefully and adhere to
specified cooling requirements. Unauthorized removal of necessary protections, improper use, incorrect
installation and operation may lead to serious safety and shock hazards or equipment damage.
- Before connecting the inverter to the power distribution grid, contact the local power distribution grid
company to get appropriate approvals. This connection must be made only by qualified technical
personnel.
- Do not install the equipment in adverse environmental conditions such as in close proximity to
flammable or explosive substances; in a corrosive environment; where there is exposure to extreme
high or low temperatures; or where humidity is high.
- Do not use the equipment when the safety devices do not work or are disabled.
- Use personal protective equipment, including gloves and eye protection during the installation.
- Inform the manufacturer about non-standard installation conditions.
- Do not use the equipment if any operating anomalies are found. Avoid temporary repairs.
- All repairs should be carried out using only approved spare parts, which must be installed in accordance
with their intended use and by a licensed contractor or authorized service representative.
- Liabilities arising from commercial components are delegated to their respective manufacturers.
- Any time the inverter has been disconnected from the public network, please be extremely cautious as

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some components can retain charge sufficient to create a shock hazard. Prior to touching any part of the
inverter please ensure surfaces and equipment are under touch safe temperatures and voltage
potentials before proceeding.
- This product was not tested to section 5 of AS/NZS 4777.2:2020, and is not to be used in multiple
inverter combinations without additional measures taken within the installation to ensure continued
compliance to requirements.
2.2 PE Connection and Leakage Current
PV System Residual Current Factors
- In every PV installation, several elements contribute to the current leakage to protective earth (PE). these
elements can be divided into two main types.
- Capacitive discharge current - Discharge current is generated mainly by the parasitic capacitance of the
PV modules to PE. The module type, the environmental conditions (rain, humidity) and even the distance
of the modules from the roof can effect the discharge current. Other factors that may contribute to the
parasitic capacitance are the inverter’s internal capacitance to PE and external protection elements such
as lighting protection.
- During operation, the DC bus is connected to the alternating current grid via the inverter. Thus, a portion
of the alternating voltage amplitude arrives at the DC bus. The fluctuating voltage constantly changes the
charge state of the parasitic PV capacitor (i.e capacitance to PE). This is associated with a displacement
current, which is proportional to the capacitance and the applied voltage amplitude.
- Residual current - if there is a fault, such as defective insulation, where an energized cable comes into
contact with a grounded person, an additional current flows, known as a residual current.
Residual Current Device (RCD)
- All Fox inverters incorporate a certified internal RCD (Residual Current Device) to protect against
possible electrocution in case of a malfunction of the PV array, cables or inverter (DC). The RCD in the
Fox inverter can detect leakage on the DC side. There are 2 trip thresholds for the RCD as required by
the DIN VDE 0126-1-1 standard. A low threshold is used to protect against rapid changes in leakage
typical of direct contact by people. A higher threshold is used for slowly rising leakage currents, to limit
the current in grounding conductors for the safety. The default value for higher speed personal protection
is 30mA, and 300mA per unit for lower speed fire safety.
Installation and Selection of an External RCD device
- An external RCD is required in some countries. The installer must check which type of RCD is required
by the specific local electric codes. Installation of an RCD must always be conducted in accordance with
local codes and standards. Fox recommends the use of a type-A RCD. Unless a lower value is required
by the specific local electric codes, Fox suggests an RCD value between 100mA and 300mA.
- In installations where the local electric code requires an RCD with a lower leakage setting, the discharge
current might result in nuisance tripping of the external RCD. The following steps are recommended to
avoid nuisance tripping of the external RCD:
1. Selecting the appropriate RCD is important for correct operation of the installation. An RCD with a rating of
30mA may actually trip at a leakage as 15mA (according to IEC 61008). High quality RCDs will typically trip at
a value closer to their rating.
2. Configure the trip current of the inverter’ internal RCD to a lower value than the trip current of the external
RCD. The internal RCD will trip if the current is higher than the allowed current, but because the internal
inverter RCD automatically resets when the residual currents are low it saves the manual reset.

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2.3 Surge Protection Devices (SPDs) for PV Installation
WARNING!
Over-voltage protection with surge arresters should be provided when the PV power system is installed. The
grid connected inverter is not fitted with SPDs in both PV input side and mains side.
Lightning will cause damage either from a direct strike or from surges due to a nearby strike.
Induced surges are the most likely cause of lightning damage in majority or installations, especially in rural
areas where electricity is usually provided by long overhead lines. Surges may impact on both the PV array
conduction and the AC cables leading to the building. Specialists in lightning protection should be consulted
during the end use application. Using appropriate external lightning protection, the effect of a direct lightning
strike into a building can be mitigated in a controlled way, and the lightning current can be discharged into the
ground.
Installation of SPDs to protect the inverter against mechanical damage and excessive stress include a surge
arrester in case of a building with external lightning protection system (LPS) when separation distance is kept.
To protect the DC system, surge suppression device (SPD type2) should be fitted at the inverter end of the
DC cabling and at the array located between the inverter and the PV generator, if the voltage protection level
(VP) of the surge arresters is greater than 1100V, an additional SPD type 3 is required for surge protection for
electrical devices.
To protect the AC system, surge suppression devices (SPD type2) should be fitted at the main incoming point
of AC supply (at the consumer’s cutout), located between the inverter and the meter/distribution system; SPD
(test impulse D1) for signal line according to EN 61632-1. All DC cables should be installed to provide as short
a run as possible, and positive and negative cables of the string or main DC supply should be bundled
together.
Avoiding the creation of loops in the system. This requirement for short runs and bundling includes any
associated earth bundling conductors. Spark gap devices are not suitable to be used in DC circuits once
conducting; they won’t stop conducting until the voltage across their terminals is typically below 30 volts.
3. About Product
3.1 About Inverter
This series inverters cover 3kW systems up to 6kW and are integrated with 2 MPP trackers with high
efficiency and reliability.
3.2 Basic Features
- Advanced DSP control technology.
- Utilizes the latest high-efficiency power component.
- Optimal MPPT technology.
- Two independent MPP trackers.
- Wide MPPT input range.
- Advanced anti-islanding solutions.
- IP65 protection level.
- Max. Efficiency up to 97.4%. EU efficiency up to 96.8%. THD<3%.
- Safety & Reliability: Transformerless design with software and hardware protection.
- Export limitation (CT/Meter/DRM0/ESTOP).
- Power factor regulation. Friendly HMI.
- LED status indications.
- LCD display technical data, human-machine interaction through touch key.

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- PC remote control.
- Upgrade through USB interface.
3.3 Terminals Introduction
Item
Description
A
DC Connector
B
DC Connector
C
DC Switch (Optional)*
D
Waterproof Lock Valve
E
Communication Port
F
USB Port (For Upgrade)
G
WiFi/GPRS/LAN (Optional)
H
AC Connector
I
Grounding Screw
Note: Only authorized personnel are permitted to set the connection.
*: Inbuilt DC Switch included in Australia market.
3.4 Dimensions

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4. Technical Data
4.1 DC Input
Model
F3000-G2
F3600-G2
F4600-G2
F5000-G2
F5300-G2*
F6000-G2
Max. recommended DC power [W]
4500
5400
6900
7500
7950
9000
Max. DC voltage [V]
600
600
600
600
600
600
Nominal DC operating voltage[V]
360
360
360
360
360
360
MPPT voltage range [V]
80-550
80-550
80-550
80-550
80-550
80-550
MPPT voltage range @ full load [V]
130-550
150-550
200-550
210-550
250-550
250-550
Max. input current
(input A/input B) [A]
14/14
14/14
14/14
14/14
14/14
14/14
Max. short circuit current
(input A/input B) [A]
18/18
18/18
18/18
18/18
18/18
18/18
Start output voltage [V]
120
120
120
120
120
120
No. of MPP trackers
2
2
2
2
2
2
Strings per MPP tracker
1
1
1
1
1
1
Max.inverter backfeed current to
the array [mA]
0
DC switch
Optional*
*: India market only.
**: Inbuilt DC Switch included in Australia market.
4.2 AC Output
Model
F3000-G2
F3600-G2
F4600-G2
F5000-G2
F5300-G2*
F6000-G2
Rated output power [W]
3000
3600
4600
5000
5300
6000
Max. apparent AC power [VA]
3300
3960/3600[1]
5060/4600[2]
5500/5000[3]
5830
6000
Rated grid voltage and range [V]
220/230
Rated AC frequency and range
[Hz]
50/60, ±5
AC nominal current [A]
13.0
15.7
20.0
21.7
23.0
26.1/27.3[4]
Max. output fault current [A]
14.3
17.2/15.7[1]
22/20[2]
23.9/21.7[3]
25.3
26.1/27.3[4]
Maximum output over current
protection [A]
58
Inrush current [A]
7.9A@50us
Rated apparent power [VA]
3000
3600
4600
5000
5300
6000
Maximum output fault current [A]
167A@10us
THD
<3%
Displacement power factor
1 (Adjustable from 0.8 leading to 0.8 lagging)
Feed in phase
Single-phase
Over voltage category
PV: OVC II Mains: OVC III
Active anti-islanding method
frequency shift
[1]3600 for G98, 3960 for other country
[2]4600 for VDE-AR-N 4105 and Belgium, 5060 for other country
[3]5000 for Australia and Belgium, 5500 for other country ; [4]27.3A for Brazil only

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4.3 Efficiency, Safety and Protection
*: India market only.
**: Inbuilt DC Switch included in Australia market.
Model
F3000-G2
F3600-G2
F4600-G2
F5000-G2
F5300*-G2
F6000-G2
Max. MPPT efficiency
99.00%
99.00%
99.00%
99.00%
99.00%
99.00%
Euro efficiency
96.80%
96.80%
96.80%
96.80%
96.80%
96.80%
Max. efficiency
97.40%
97.40%
97.40%
97.40%
97.40%
97.40%
Safety & Protection
DC reverse-polarity protection
Yes
Anti-Islanding protection
Yes
Insulation monitoring
Yes
Residual current monitoring
Yes
AC short circuit protection
Yes
AC output over current protection
Yes
AC output over voltage protection
Yes
Surge protection
Yes
Temperature protection
Yes
Integrated DC switch
Optional**
STANDARD
Safety
IEC62109-1/2
EMC
IEC 61000-6-1 /IEC 61000-6-2 /IEC 61000-6-3
Cetification
AS4777.2 / VDE-AR-N 4105 /G98 / G99 / EN50549-1/ CEI 0-21

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4.4 General Data
Model
F3000-G2
F3600-G2
F4600-G2
F5000-G2
F5300-G2*
F6000-G2
Dimension [W/H/D] (mm)
402*453*148
Net weight [kg]
15.5
Installation
Wall-mounted
Operating temperature range [°C]
-25...+60 (derating at 45)
Storage temperature [°C]
-40...+70
Storage/operation relative humidity
0%~100%, no condensation
Max. operating altitude
3000m (derating when >2000m)
Ingress protection
IP65 (for outdoor use)
Topology
Non-isolated
Isolation type
Transformerless
Protective class
I
Night-time consumption
<1W
Pollution degree
II
Cooling
Natural
Noise level
<30dB
Monitoring module(optional)
External WiFi/GPRS (optional)
Communication
Meter/CT/DRM/USB update/RS485
Display
LCD screen, touch key, App, Web site
Over frequency derating
The function of active power limitatopm for ovrer-frequency transient has an
activation delay with can be set from 0 to 1s in steps of 50ms
(default setting: no intentional delay).
Q=f(V) characteristic curve
The adjustment has an activation delay which can be set from 0 to 30s in steps
of (default setting :1s).
*India market only.

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5. Installation
5.1 Packing List
Please un-pack the box, check and make sure you received all items as listed below before installation (excluding
optional items):
5.2 Preparation
- Please refer to the Technical Data to make sure the environmental conditions fit the inverter’s requirements
(degree of protection, temperature, humidity, altitude, etc.)
- Please avoid direct sunlight, rain exposure and snow build-up during installation and operation.
- To avoid overheating, always make sure the air flow around the inverter is not blocked.
- Do not install in places where gas or flammable substances may be present.
- Avoid electromagnetic interference that can compromise the correct operation of electronic equipment.
- The slope of the wall should be within ±5°.
B
Object
Quantity
Description
Object
Quantity
Description
A
1
Inverter
I
1
Communication connector
B
1
Bracket
J
1
Product manual
C
4
DC connector (F/M)
K
1
Quick installation guide
D
1
AC connector
L
1
CT (optional)
E
3
Expansion tube
M
1
WiFi/LAN/GPRS (optional)
F
3
Expansion screw
N
1
Meter (optional)
G
4
DC pin contact
(2*positive, 2*negative)
O
2
Unlock tool
H
1
Earth terminal
A B C D E
F G H I J
K L M N O

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5.3 Installation Space Required
5.4 Tools Required
• Manual wrench;
• Electric drill (drill bit set 8mm);
• Crimping pliers;
• Stripping pliers;
• Screwdriver.
5.5 Installation Steps
Step 1: Fix the bracket on the wall
- Choose the place you want to install the inverter. Place the bracket on the wall and mark the position of the 3
holes from bracket.
- Drill holes with electric drill, make sure the holes are at least 50mm deep, and then tighten the expansion
tubes.
Position
Min Size
Left
300mm
Right
300mm
Top
300mm
Bottom
300mm
Front
300mm

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- Insert the expansion tubes into the holes and tighten them. Install the bracket with the expansion screws.
Step 2: Match the inverter with wall bracket
- Hang the inverter over the bracket, slightly lower the inverter, and make sure the 2 mounting bars on the
back are fixed with the 2 grooves from bracket properly.
5.6 Wiring Steps
Step 1: PV String Connection
This series inverters can be connected with 2-strings of PV modules. Please select suitable PV modules with high
reliability and quality. Open circuit voltage of module array connected should be less than 600V, and operating
voltage should be within the MPPT voltage range.
Note!
Please choose a suitable external DC switch if the inverter does not have a built-in
DC switch.
Warning!
PV module voltage is very high and within a dangerous voltage range, please comply
with the electric safety rules when connecting.
Warning!
Please do not make PV positive or negative to ground!
Note!
PV modules – please ensure they are the same type, have the same output and
specifications, are aligned identically, and are tilted to the same angle. In order to
save cable and reduce DC loss, we recommend installing the inverter as near to the
PV modules as possible.

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Note: PV connection mode below is not allowed.
Step 2: DC Wiring
• Turn off the DC switch.
• Choose 12 AWG wire to connect the PV module.
• Trim 6mm of insulation from the wire end.
• Separate the DC connector as below.
• Insert striped cable into pin contact and ensure all conductor strands are captured in the pin contact.
• Crimp pin contact by using a crimping plier. Put the pin contact with striped cable into the corresponding
crimping pliers and crimp the contact.
• Insert pin contact through the cable nut to assemble into back of the male or female plug. When you feel or
hear a “click” the pin contact assembly is seated correctly.
• Unlock the DC connector
·Use the specified wrench tool.
·When separating the DC + connector, push the tool down from the top.
·When separating the DC - connector, push the tool down from the bottom.
·Separate the connectors by hand.

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• Grid Connection
This series inverters are designed for single-phase grid. Voltage range is 220/230/240V; frequency is
50/60Hz. Other technical requests should comply with the requirement of the local public grid.
Model (kW)
3.0
3.6
4.6
5.0
5.3*
6.0
Cable
4mm²
4mm²
6mm²
6mm²
6mm²
6mm²
Micro-Breaker
25A
25A
40A
40A
40A
40A
WARNING!
A micro-breaker for max output overcurrent protection device shall be installed between inverter and
grid, and the current of the protection device is referred to the table above, any load SHOULD NOT
be connected with the inverter directly.
Step 3: AC Wiring
• Check the grid voltage and compare with the permitted voltage range (refer to technical data).
• Disconnect the circuit-breaker from all the phases and secure against reconnection.
• Trim the wires:
- Trim all the wires to 52.5mm and the PE wire to 55mm.
- Use the crimping pliers to trim 12mm of insulation from all wire ends as below.
• Separate the AC plug into three parts as below.
- Hold middle part of the female insert, rotate the back shell to loosen it, and detach it from female inset.
- Remove the cable nut (with rubber insert) from the back shell.
• Slide the cable nut and then the back shell onto the cable.
L: Brown/Red Wire
N: Blue/Black Wire
PE: Yellow & Green Wire
Note: Please refer to local cable type and color for actual installation.

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• Push the threaded sleeve into the socket, tighten up the cap on the terminal.
• Push the threaded sleeve to connection terminal until both are locked tightly on the inverter.
• Remove the AC connector, press the bayonet out of the slot with a small screwdriver or the unlock tool and
pull it out, or unscrew the threaded sleeve, then pull it out.
5.7 Earth Connection
Screw the ground screw with screwdriver as shown below:
5.8 Communication Device Installation (Optional)
This series inverter is available with multiple communication options such as WiFi, LAN, GPRS, RS485, Meter and
USB with an external device.
Operating information like output voltage, current, frequency, fault information, etc., can be monitored locally or
remotely via these interfaces.

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• WiFi/LAN/GPRS (optional)
The inverter has an interface for WiFi/LAN/GPRS devices that allow this device to collect information from inverter;
including inverter working status, performance etc., and update that information to monitoring platform (the
WiFi/LAN/GPRS device is available to purchase from your local supplier).
Connection steps:
1. For GPRS device: Please insert the SIM Card (please refer to the GPRS product manual for more details).
2. For LAN device: Please complete the wiring between router and LAN device (please refer to the LAN product
manual for more details).
3. Plug the WiFi/LAN/GPRS device into “WiFi/GPRS” port at the bottom of the inverter.
4. For WiFi device: Connect the WiFi with the local router, and complete the WiFi configuration (please refer to
the WiFi product manual for more details).
5. Set-up the site account on the monitoring platform (please refer to the monitoring user manual for more
details).
• Hard Export limitation setting:
Short press the touch key to switch display or make the number+1. Long press the touch key to confirm your
setting. There are three options in Set CTmode: Disable/CT/Meter, Please select according to the actual situation
and then it will ask you to set the parameters(Long press for confirmation and switching to next digit, short press
for changing the value).
Note: CT or Smart meter is required for hard export limitation function and the soft export limit function is
controlled by platform.(Please refer to advanced configuration)
• CT (optional) (EM-EICT-120K-T210C or CTSA016)
This inverter has an integrated export management function. To enable this function, a power meter or CT must be
installed. The CT should be clamped on the main live line of the grid side. The arrow on the CT should be pointing
towards the grid. The white cable connects to CT+, and the black cable connects to CT-.

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• RS485/Meter
- RS485
RS485 is a standard communication interface which can transmit the real time data from inverter to PC or
other monitoring devices.
- Meter (optional) (Eastron-SDM230-Modbus)
The inverter has integrated export limitation functionality. To use this function, a power meter or a CT must
be installed. For Meter installation, please install it on the grid side.
• DRM0/ESTOP
Note!
For a precise reading and control of power, a meter can be used instead of a CT. If the
CT is fitted in the wrong orientation, anti-backflow function will fail.
Model
Socket asserted by shorting pins
Function
DRM0
5
6
Operate the disconnection device.
ESTOP
5
8
Emergency stop the inverter.

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DRM0 setting
Short press the touch key to switch display or make the value+1. Long press the touch key to confirm your setting.
The PIN definitions of CT/RS485/DRM0/ESTOP interface are as below.
PIN
1
2
3
4
5
6
7
8
Definition
CT+
CT-
METER 485-
METER 485+
GND
DRM0
NC
ESTOP
• Upgrade
The inverter firmware can be updated locally through a U-disk. Please refer to following steps.
a. Please contact our service support team to get the latest firmware, and copy the files to U-disk using the
following file path:
Master: “Update\master\xxxxx_Master_Vx.xx.hex”
Slave: “Update\slave\xxxxx_Slave_Vx.xx.hex”
Manager: “Update\manager\xxxxx_manager_Vx.xx.hex”
Note:Vx.xx is version number.
b. Make sure the DC switch (if no DC switch, please disconnect the PV connector) is off and the AC is
disconnected from the grid. Unscrew the waterproof lid of the USB port using a flat-headed screwdriver as
below.
Warning!
Make sure the directory structure is strictly in accordance with the above. Do not
modify the program file name! It may cause the inverter to cease functioning.