FoxESS R Series User manual

In order to prevent improper operation before use, please read this manual
carefully.
R Series
User Manual

1
Table of Contents
1. Notes on This Manual ............................................................................................................................ 2
1.1 Scope of Validity .......................................................................................................................... 2
1.2 Target Group ................................................................................................................................2
1.3 Symbols Used ..............................................................................................................................2
1.4 Symbols Explanation ..................................................................................................................2
2. Safety Precautions ................................................................................................................................. 4
2.1 Appropriate Usage .......................................................................................................................4
2.2 PE Connection and Leakage Current .......................................................................................... 4
2.3 Surge Protection Devices (SPDs) for PV Installation .................................................................. 5
3. Introduction ............................................................................................................................................ 6
3.1 Product Introduction .....................................................................................................................6
3.2 Basic Features .............................................................................................................................6
3.3 Size ..............................................................................................................................................6
3.4 LED Indicator Panel .....................................................................................................................7
3.5 Terminals of Inverter .................................................................................................................... 8
4. Technical Parameters .............................................................................................................................9
4.1 DC Input/AC Output .....................................................................................................................9
4.2 Efficiency, Protection, and Safety ................................................................................................ 9
4.3 General Data ............................................................................................................................. 10
5. Installation ............................................................................................................................................ 11
5.1 Check for Physical Damage .......................................................................................................11
5.2 Packing List ................................................................................................................................11
5.3 Mounting .................................................................................................................................... 11
6. Electrical Connection ........................................................................................................................... 17
6.1 Wiring Steps .............................................................................................................................. 17
6.2 Communication Device Installation (Optional) ...........................................................................20
6.3 Inverter Start-Up ........................................................................................................................ 22
6.4 Inverter Switch Off ..................................................................................................................... 22
7. Maintenance .........................................................................................................................................23
7.1 Alarm List ...................................................................................................................................23
7.2 Troubleshooting ......................................................................................................................... 29
7.3 Routine Maintenance .................................................................................................................30
8. Decommissioning .................................................................................................................................31
8.1 Dismantling the Inverter .............................................................................................................31
8.2 Packaging .................................................................................................................................. 32
8.3 Storage and Transportation ....................................................................................................... 32

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1. Notes on This Manual
1.1 Scope of Validity
This manual describes the assembly, installation, commissioning, maintenance and troubleshooting
of the following model(s) of FOXESS products:
R75, R100, R110
1.2 Target Group
This manual is for qualified electricians. The tasks described in this manual only can be performed
by qualified electricians.
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
CE mark.
The inverter complies with the requirements of the applicable CE
guidelines.
Beware of hot surface.
The inverter can become hot during operation. Avoid contact during
operation.
Danger of high voltages.
Disconnect from the grid and the PV generator before opening the
device.

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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 15 min to
discharge. Wait 15 min before you open the cover.
Read the manual.
Product should not be disposed as household waste.
This mark indicates that the product meets UK safety certification
requirements.
This mark indicates that the product meets EU environment protection
certification requirements.

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2. Safety Precautions
2.1 Appropriate Usage
This series inverter is designed and tested in accordance with international safety requirements.
However, certain safety precautions must be taken into account 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 FOXESS service
representative.
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
All FOXESS 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 FOXESS inverter can detect leakage on the DC side. The RCD limit is set to 30mA, and
the RCD must be must be type B and not type A or AC RCD (IEC 60755). There are 2 trip thresholds
for the RCD as required by NB/T32004-2018. 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, 60mA, and 150mA per unit, and 1A per unit for lower
speed fire safety.

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2.3 Surge Protection Devices (SPDs) for PV Installation
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.

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3. Introduction
3.1 Product Introduction
R75, R100, and R110 are three-phase transformerless grid-tied inverters, which are important
components of PV power generation system. The inverter converts the direct current generated by
the photovoltaic cells into alternating current that meets the requirements of the grid and feeds into
the grid.
3.2 Basic Features
The series of three-phase high performance inverters cover 75kW to 110kW, wherein R75 and R100
are integrated with 9 MPP trackers, and R110 is integrated with 10 MPP trackers. The conversion
efficiency is high, and the product is stable and reliable.
System advantages:
Integration with PID recovery function
Optimized MPP tracking technology
9 MPP trackers and 10 MPP trackers
Wide MPPT input range
Max. Efficiency up to 98.6%, CN efficiency up to 98.2%, EU efficiency up to 98.2%, THD<3%
IP66 protection level
Side wiring without opening the cover
LED status indications
Remote monitoring via PC or APR
3.3 Size

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3.4 LED Indicator Panel
No.
Indicator
Status
Description
A
PV connection
indicator
Steady On
At least one PV string is properly connected, and the DC
input voltage of the corresponding MPPT circuit is at least
200 V. The solar inverter is in grid-tied mode
Blinking (1s on
and 1s off)
At least one PV string is properly connected, and the DC
input voltage of the corresponding MPPT circuit is at least
200 V. The solar inverter is not in grid-tied mode
Off
The solar inverter disconnects from all PV strings, or the DC
input voltage of all MPPT circuits is less than 200V. The
solar inverter is not in grid-tied mode.
B
Grid indicator
Steady On
Grid voltage is in normal range. The solar inverter is in
grid-tied mode.
Blinking (1s on
and 1s off)
Grid voltage is in normal range. The solar inverter is not in
grid-tied mode.
Off
Grid voltage is not in normal range. The solar inverter is not
in grid-tied mode.
C
PID Recovery
indicator
On
PID recovery is on.
Blinking (1s on
and 1s off)
An alarm of PID recovery is generated.
Off
PID recovery is off.
D
Alarm indicator
On
An alarm is generated.
Off
No alarm.

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3.5 Terminals of Inverter
Item
Name
Description
A
DC Switch
It is used for controlling DC input.
B
Waterproof Vent
Valve
It is undetachable and usable for making the case waterproof and
air-permeable.
C
DC Input Terminal
R75 and R100 have 18 pairs of PV connectors; R110 has 20 pairs of
PV connectors.
D
Communication
Terminal
It is used for RS485 communication and DI/DO wiring.
E
Communication
Terminal
It matches with the communication module.
F
M40 Cable Gland
Cable diameter range is 14-32mm. If the PE cable is connected
separately, pass through the spare waterproof cable head.
G
M75 Cable Gland
Cable diameter range is 38-56mm. It is used for AC output wiring.
H
Secondary Ground
Terminal
There are two secondary ground terminals for reliable grounding of
the inverter, at least one of which is selected for grounding.

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4. Technical Parameters
4.1 DC Input/AC Output
MODEL
R75
R100
R110
INPUT (DC)
Max. Input Voltage
1100V
1100V
1100V
Start-up Input Voltage
250V
250V
250V
Rated Input Voltage
600V
600V
600V
MPPT Operating Voltage
Range (Full Load)
550V-850V
550V-850V
550V-850V
MPPT Operating Voltage
Range
200-1000V
200-1000V
200-1000V
No. of MPP Trackers
9/2
9/2
10/2
Max. Input Current
26A
26A
26A
Max. Short-circuit Current
40A
40A
40A
OUTPUT (AC)
Rated Output Power
75kW
100kW
110kW
Max. Apparent AC Power
75*/82.5kVA
110kVA
121kVA
Max. Output Current
113.7*/119.6A
166.7A
175.3A
Rated Grid Voltage
380/400V, 3W+N+PE
380/400V, 3W+N+PE
400V, 3W+N+PE
Grid Voltage Range
320-460VAC
320-460VAC
320-460VAC
Grid Frequency Range
45-55Hz/55-65Hz
45-55Hz/55-65Hz
45-55Hz/55-65Hz
Adjustable Power Factor
0.8 leading~0.8 lagging
0.8 leading~0.8 lagging
0.8 leading~0.8 lagging
THDi
<3%
<3%
<3%
Note: * Only for Brazil market.
4.2 Efficiency, Protection, and Safety
MODEL
R75
R100
R110
EFFICIENCY
Max. Efficiency
98.6%
Euro. Efficiency
98.2%
PROTECTION
DC Switch
Yes
DC Reverse Polarity Protection
Yes
AC Overcurrent Protection
Yes
AC Short-circuit Protection
Yes
DC Surge Protection
Class II
AC Surge Protection
Class II
PID Recovery
Yes
Insulation Monitoring
Yes
Residual Current Monitoring
Yes
AFCI
Optional

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PV String Current Monitoring
Optional
STANDARD
Safety, EMC, and Certification
IEC 62109, IEC 61727, IEC 62116, IEC 60068, IEC 61683, IEC
61000-6-3, EN 50549
4.3 General Data
MODEL
R75
R100
R110
GENERAL DATA
Dimensions (W*H*D)
975*630*360mm
Weight
90kg
Operating Ambient
Temperature Range
–30℃～60℃
Cooling Method
Smart air cooling
Operating Altitude
4000m
Relative Humidity Range
0～100% (non-condensing)
Ingress Protection Rating
IP66 (for outdoor use)
Isolation Method
Transformerless
Display
LED, Wi-Fi+APP
Communication
RS485/USB/Wi-Fi+LAN/4G
DC Connection Type
MC4
AC Connection Type
OT terminal

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5. Installation
5.1 Check for Physical Damage
Make sure the inverter has not been damaged during transportation. If there is any visible damage,
such as cracks, please contact your dealer immediately.
5.2 Packing List
Open the package and take out the product, please check the accessories first. The packing list is as
shown as below:
P
Object
Quantity
Description
Object
Quantity
Description
A
1
Inverter
I
4
M4*10 Screw
B
1
Left Hanging Plate
J
36
DC Connector (Positive*18,
Negative*18)*
C
1
Right Hanging Plate
K
36
DC Pin Plug (Positive*18,
Negative*18)*
D
1
Hanging Plate Connection Bar
L
1
Communication Connector
E
4
Screw-in Type Handle
M
2
Ground Terminal
F
4
M10*45 Bolt Assembly
N
1
5mm Internal Hexagon Wrench
G
4
M10 Hexagon Nut
O
1
Quick Installation Guide
H
2
M6*50 Bolt Assembly
P
1
Smart WiLANII
Note: * R75 and R100 inverters are provided with DC Connector (Positive*18, Negative*18)
and DC Pin Plug (Positive*18, Negative*18); R110 inverter is provided with DC Connector
(Positive*20, Negative*20) and DC Pin Plug (Positive*20, Negative*20).

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5.3 Mounting
- Installation Precaution
Make sure the installation location complies with the following conditions:
•Not in direct sunlight.
•Not in areas where highly flammable materials are stored.
•Not in potential explosive areas.
•Not in the cool air directly.
•Not near the television antenna or antenna cable.
•Not higher than altitude of about 4000m above sea level.
•Not in environment of precipitation or humidity (>100%).
•Under good ventilation condition.
•The ambient temperature in the range of -30°C to +60°C.
•The slope of the wall should be within ±5°.
•The wall hanging the hybrid inverter should meet conditions below：
1. Solid brick/concrete, or strength equivalent mounting surface;
2. Hybrid inverter must be supported or strengthened if the wall's strength isn't enough
(such as wooden wall, the wall covered by thick layer of decoration).
•Avoid direct sunlight, rain exposure, snow laying up during installation and operation.
•Space Requirement
•Installation Steps
Tools required for installation include, but not limited to, the following recommended tools. If
necessary, use other auxiliary tools on the spot.

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Step 1: Hanging Plate Assembly
Install the Inverter on a bracket or wall by means of the hanging plate. The hanging plate assembly
diagram and the size of the assembled hanging plate are shown as below:
Hanging Plate Assembly Diagram
4 PCS of M4*10 screws
Safety Goggles
Soundproof Earplugs
Dust Mask
Insulating Gloves
Insulating Work Shoes
Marker
Antistatic Wrist Strap
Knife
Percussion Drill (φ12)
Rubber Hammer
Level
Cross Screwdriver
M4, M6, M8
Straight Screwdriver
M2, M3, M6
MC4 Wrench
Wrench
16mm, 33mm
Wire Cutter
Wire Stripper
Hydraulic Clamp
Sleeve Combination
M4, M8, M12
Heat Gun
Multimeter
(≥1100V DC)
Electric Drill (φ12)
Scissors
Vacuum Cleaner

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The Size of Hanging Plate
Step 2: Bracket-mounted Installation or Wall-mounted Installation
Mode 1: Bracket-mounted Installation
1. Place the assembled hanging plate on a PV bracket, adjust the angle with a level, mark drilling
positions, and drill holes with an electric drill (with a φ12 drill bit).
2. Fix the hanging plate with bolts.
A: 4 PCS of M10*45 hexagon bolts B: 4 PCS of hexagon nuts
Mode 2: Wall-mounted Installation
1. Place the assembled hanging plate at the installation site, adjust the angle with a level, and
mark drilling positions.
A
B

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2. Drill holes with a hammer drill (with a φ12 drill bit), clear holes, insert 4 PCS of expansion bolts
(by client, M10*95 is recommended) into holes, and fix them with a rubber hammer.
3. Fix the hanging plate with expansion bolts.
A: 4 PCS of M10 hexagon nuts B:4 PCS of expansion bolts (M10) C: Wall
Step 3: Inverter Installation
1. Lift the inverter from the package box with 4 PCS of screw-in type handles.
2. Install the inverter on the hanging plate, and ensure that lugs of the inverter are properly
matched with slots of the hanging plate.
Screw-in type handle
A
B
C

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3. Secure the inverter with bolts.
——End
2 PCS of M6*50 bolts

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6. Electrical Connection
6.1 Wiring Steps
Step1: Secondary Ground Connection
Lock crimped ground cables to ground holes with screw locks on the inverter case, and paint the
ground screws and ground terminals to improve anti-corrosion characteristics.
The conductor sectional area of each ground cable is 0.5~10 mm2(4~6 mm2is recommended).
Step 2: AC Side Wiring
• Check the grid voltage and compare with the permitted voltage range (refer to technical data).
• Disconnect the circuit-breaker of all the phases and secure against re-connection.
• Trim the cables.
Cable Type
Outer Diameter (mm)
Conductor Sectional Area (mm2)
AC Cable
38~56
L1,L2,L3, (N) Cables: 70~240; PE: 0.5~10
• Open the AC side wiring box with a 5mm internal hexagon wrench. Open the breaker and
prevent its accidental reclose.
• Unscrew the lock nut of the waterproof connector and take out multilayer sealing rings. Select
the sealing ring based on the cable outer diameter. Route the cable through the lock nut and
sealing ring.
Internal Hexagon Wrench

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• Peel off the protective layer and insulation layer of a certain length and crimp the cold-pressed
terminals as shown below:
• Secure cables to the corresponding terminals with a hexagon socket wrench and a cross
screwdriver, and tighten the waterproof cable heads.
D
Remove this sealing
ring when the diameter
D≥47mm.
If the PE cable is connected
separately, route the cable through
the spare waterproof cable head.

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Step 3: DC Side Connection
This series inverters can be connected with at most 20 strings of PV modules depending on the
inverter type. Please select suitable PV modules with high reliability and quality. Open circuit voltage
of the module array connected should be less than 1100V, and operating voltage should be within
the MPPT voltage range.
DC Wiring
• Turn off the DC switch.
• It is recommended that the DC cable dedicated to photovoltaics (2.5~4 mm²) be used to connect
the PV module.
• Trim about 6mm of insulation from the cable end.
• Separate the DC connector as below.
• Insert multiple cables connected to the PV module into the pin plug and ensure all strands are
captured in the pin plug.
• Crimp the pin plug with a crimping plier.
• Route the crimped cable through the nut into the plug. When you hear a “click”, the pin plug is
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.