FoxESS S700-G2 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.
The user manual version is updated frequently, the latest version can be
downloaded from the official website.
S Series (G2)

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 .......................................................................................................................................................5
3.1 About S Series (G2) Inverter .......................................................................................................................... 5
3.2 Basic Features ............................................................................................................................................... 5
3.3 Terminals Introduction .................................................................................................................................... 6
3.4 Dimensions .....................................................................................................................................................6
4. Technical Data ...................................................................................................................................................... 7
4.1 DC Input ......................................................................................................................................................... 7
4.2 AC Output .......................................................................................................................................................7
4.3 Efficiency, Safety and Protection ....................................................................................................................8
4.4 General Data .................................................................................................................................................. 9
5. Installation .......................................................................................................................................................... 10
5.1 Packing List .................................................................................................................................................. 10
5.2 Preparation ...................................................................................................................................................10
5.3 Installation Space Required ..........................................................................................................................11
5.4 Tools Required ..............................................................................................................................................11
5.5 Installation Steps .......................................................................................................................................... 11
5.6 Wiring Steps ................................................................................................................................................. 12
5.7 Earth Connection ..........................................................................................................................................15
5.8 Communication Device Installation (Optional) ............................................................................................. 15
5.9 Inverter Start-Up ...........................................................................................................................................19
5.10 Inverter Switch Off ......................................................................................................................................20
6. Operation ............................................................................................................................................................20
6.1 Control Panel ................................................................................................................................................20
6.2 Function Tree ............................................................................................................................................... 21
7. Firmware Upgrading ........................................................................................................................................... 22
8. Maintenance ....................................................................................................................................................... 23
8.1 Alarm List ......................................................................................................................................................23
8.2 Troubleshooting ............................................................................................................................................24
8.3 Routine Maintenance ................................................................................................................................... 25
9. Decommissioning ............................................................................................................................................... 26
9.1 Dismantling the Inverter ............................................................................................................................... 26
9.2 Packaging .....................................................................................................................................................26
9.3 Storage and Transportation ..........................................................................................................................26

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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 ESS products:
S Series (G2):
S700-G2 S1000-G2 S1500-G2 S2000-G2
S2500-G2 S3000-G2 S3300-G2
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.

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Danger of high voltages.
Danger to life due to high voltages in the inverter!
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
S Series (G2) 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.

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- 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 Fox ESS 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 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.
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 ESS 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 ESS 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 ESS recommends the use of a type-A RCD.
Unless a lower value is required by the specific local electric codes, Fox ESS 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

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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.
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.

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3. About Product
3.1 About S Series (G2) Inverter
S Series (G2) inverters cover 0.7kW systems up to 3.3kW and are integrated with 1 MPP tracker
with high efficiency and reliability.
3.2 Basic Features
-Advanced DSP control technology.
-Utilizes the latest high-efficiency power component.
-Optimal MPPT technology.
-Wide MPPT input range.
-Advanced anti-islanding solutions.
-IP65 protection level.
-Max. Efficiency up to 97.4%. EU efficiency up to 96.8%.
-Safety & Reliability: Transformerless design with software and hardware protection.
-Export limitation (CT/Meter/ESTOP).
-Power factor regulation. Friendly HMI.
-LED status indications.
-LCD display technical data, human-machine interaction through touch key.
-PC remote control.

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3.3 Terminals Introduction
Item
Description
A
DC Switch (Optional)
B
PV
C
COM
D
Waterproof Lock Valve
E
WiFi/GPRS/4G/USB
F
Ground Screw
G
AC Connector
Note: Only authorized personnel are permitted to set the connection.
3.4 Dimensions
For S Series (G2):

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4. Technical Data
4.1 DC Input
Model
S700-G2
S1000-G2
S1500-G2
S2000-G2
S2500-G2
S3000-G2
S3300-G2
Max.
recommended DC
power [W]
1050
1500
2250
3000
3750
4500
4950
Max. DC voltage
[V]
500
500
500
500
500
500
500
Nominal DC
operating
voltage[V]
360
360
360
360
360
360
360
MPPT voltage
range [V]
50-480
50-480
50-480
50-480
50-480
50-480
50-480
MPPT voltage
range @ full load
[V]
80-450
110-450
160-450
210-450
240-450
280-450
300-450
Max. input current
[A]
14
Max. short circuit
current [A]
18
Start output
voltage [V]
60
No. of MPP
trackers
1
Strings per MPP
tracker
1
DC switch
Optional
Max. Inverter
backfeed current
to the array
0
4.2 AC Output
Model
S700-G2
S1000-G2
S1500-G2
S2000-G2
S2500-G2
S3000-G2
S3300-G2
Rated output
power [W]
700
1000
1500
2000
2500
3000
3300
Max. apparent AC
power [VA]
800
1100
1650
2200
2750
3300
3300
Rated grid voltage
and range [V]
220/230/240