SOLIS S6 Series User manual

User Manual
for S6 Series Grid Inverter
Version 1.0, Release Date: 04,2023
Applicable models
S6-GR1P2.5K-S
S6-GR1P3K-S
S6-GR1P3.6K-S
S6-GR1P4K-S
S6-GR1P4.6K-S
S6-GR1P5K-S
S6-GR1P6K-S
Applicable System
Single phase system

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1. Introduction
2. Safety Instructions
2.1 Safety Symbols
2.2 General Safety Instructions
2.3 Notice For Use
3. Overview
3.1 Front Panel Display
1.1 Product Description
1.2 Packaging
4. Installation
4.1 Select Location for the Inverter
4.2 Mounting the Inverter
Contents
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4.3 Electrical Connections
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5. Commissioning
5.1 Preparation
5.2 APP Download
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1.3 Product Handing
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2.4 Notice for Disposal
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4.3.1 Connect PV side of inverter
4.3.2 Connect grid side of inverter
4.3.3 External ground connection
4.3.4 Max. over current protection device (OCPD)
4.3.5 Inverter monitoring connection
4.3.6 Electrical connection diagram
4.3.7 Meter Connection(optional)
4.3.8 CT connections(optional)
4.3.9 Logic interface connection
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1.4 Product Storage
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5.3 Log in the APP via bluetooth
5.4 Stop the Inverter
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Contents
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7. Maintenance
8. Troubleshooting
9. Specifications
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6. Operation 30
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6.1 Home Page
6.2 Info Page
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6.3 Alarm Page
6.4 Setting Page
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1.1 Product Description
Figure 1.1 Front view
Figure 1.2 Bottom view
Solis S6 Single Phase Inverters integrate DRM and backflow power control function, that
could suitable for smart grid requirement.
This manual covers the S6 Single Phase Inverter model listed below:
S6-GR1P2.5K-S, S6-GR1P3K-S, S6-GR1P3.6K-S, S6-GR1P4K-S, S6-GR1P4.6K-S,
S6-GR1P5K-S, S6-GR1P6K-S
LED screen,
Function see section 3.1
1. Introduction
3
User Manual
8888
kW
.
kWhToday
Powe r
8888
kW
.
kWhToday
Pow er
DC input
Data Logging Stick
CT or Meter input DRM
DC Switch
AC output

Inverter x1 Back plate x1
1.2 Packaging
When you receive the inverter, please ensure that all the parts listed below are included:
Fastening screw x2
If anything is missing, please contact your local Solis distributor.
AC connector x1
RJ45 connector x1
(Optional)
Quick Installation
Manual x1
WiFi/GPRS Stick x1
(Optional)
Quick
Installation
Manual
DC connector x2
OR
1. Introduction
4
User Manual

1.3 Product Handling
Please review the instruction below for handling the inverter:
1. The red circles below denote cutouts on the product package.
Push in the cutouts to form handles for moving the inverter.
Figure 1.3 move the inverter
2. Open the carton, then handle both sides of inverter through the area denoted dotted line.
1.4 Product Storage
Storage temperature must be between -40℃ and 70℃ and the humidity should be
between 0 and 95% non-condensing.
Stack no more than four (4) inverters high.
If the inverter is not to be installed immediately, storage instructions and environmental
conditions are below:
Use the original box to repackage the inverter, seal with adhesive tape with the
desiccant inside the box.
Store the inverter(s) in a clean and dry place, free of dust and dirt.
Keep box(es) away from corrosive materials to avoid damage to the inverter enclosure.
Inspect packaging regularly. If packaging is damaged(wet, pest damage, etc),
repackage the inverter immediately.
Store the inverter(s) on a flat, hard surface - not inclined or upside down.
After long-term storage, the inverter needs to be fully examined and tested by qualified
service or technical personnel before using.
Restarting after a long period of non-use requires the equipment to be inspected
and, in some cases, the removal of oxidation and dust that has settled inside the
equipment will be required.
1. Introduction
5
User Manual
Figure 1.4 Inverter handles

2.1 Safety Symbols
Safety symbols used in this manual, which highlight potential safety risks and important
safety information, are listed as follows:
CAUTION:
CAUTION, RISK OF ELECTRIC SHOCK symbol indicates important safety
instructions, which if not correctly followed, could result in electric shock.
CAUTION:
CAUTION, HOT SURFACE symbol indicates safety instructions, which if not
correctly followed, could result in burns.
NOTE:
NOTE symbol indicates important safety instructions, which if not correctly
followed, could result in some damage or the destruction of the inverter.
WARNING:
WARNING symbol indicates important safety instructions, which if not
correctly followed, could result in serious injury or death.
WARNING:
Please don’t connect PV array positive(+) or negative(-) to ground, it could
cause serious damage to the inverter.
WARNING:
Only devices in compliance with SELV (EN 69050) may be connected to the
RS485 and USB interfaces.
2.2 General Safety Instructions
NOTE:
PV module used with inverter must have an IEC 61730 Class A rating.
WARNING:
Electrical installations must be done in accordance with the local and national
electrical safety standards.
2. Safety & Warning User Manual
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CAUTION:
Risk of electric shock from energy stored in capacitors of the Inverter.
Do not remove cover for 5 minutes after disconnecting all power sources
(service technician only). Warranty may be voided if the cover is removed
without unauthorized.
CAUTION:
The surface temperature of the inverter can exceed 75℃ (167F).
To avoid risk of burns, DO NOT touch the surface when inverter is operating.
The inverter must be installed out of reach of children.
CAUTION:
The PV array (Solar panels) supplies a DC voltage when they are exposed to
sunlight.
WARNING:
To reduce the risk of fire, over-current protective devices (OCPD) are
required for circuits connected to the Inverter. The DC OCPD shall be installed
per local requirements. All photovoltaic source and output circuit conductors
shall have disconnects that comply with the NEC Article 690, Part II.
All Solis S6 Single Phase Inverters feature an integrated DC switch.
CAUTION:
Risk of electric shock. Do not remove cover. There is no user serviceable
parts inside. Refer servicing to qualified and accredited service technicians.
WARNING:
Do not touch any inner live parts until 5 minutes after disconnection from
the utility grid and the PV input.
WARNING:
No live construction is allowed, and before installation, ensure that the
equipment is in good condition.
WARNING:
Destruction of the inverter due to overvoltage;Damage to the product due to
ground fault on DC side during operation；Damage to the product due to sand,
dust and moisture ingress if the DC inputs are not closed.
2. Safety & Warning User Manual
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2.3 Notice For Use
The inverter has been constructed according to the applicable safety and technical
guidelines. Use the inverter in installations that meet the following specifications only:
1. Permanent installation is required.
2. All components must remain within their permitted operating ranges and their
installation requirements at all times.
3. The product must only be used in countries for which it is approved or released by
Solis and the grid operator.
4. Use Solis products only in accordance with the information provided in the enclosed
documentation and with the locally applicable laws, regulations, standards and
directives. Any other application may cause personal injury or property damage.
5. This document does not replace any regional, state, provincial, federal or national laws,
regulations or standards that apply to the installation, electrical safety and use of the
product. Solis assumes no responsibility for the compliance or non-compliance with
such laws or codes in connection with the installation of the product.
6. The electrical installation must meet all the applicable regulations and standards.
7. The inverter must be installed according to the instructions stated in this manual.
8. The inverter must be installed according to the correct technical specifications.
9. To startup the inverter, the Grid Supply Main Switch (AC) must be switched on, before
the solar panel's DC isolator shall be switched on. To stop the inverter, the Grid Supply
Main Switch (AC) must be switched off before the solar panel's DC isolator shall be
switched off.
2.4 Notice for Disposal
This product shall not be disposed of with household waste. They should
be segregated and brought to an appropriate collection point to enable
recycling and avoid potential impacts on the environment and human health.
Local rules in waste management shall be respected .
2. Safety & Warning User Manual
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3.1 Front Panel Display
Light Status Description
Today's energy yield.
Current AC power.
The error code.
Blue
Solid ON
Yellow
Solid ON
Red
Solid ON
OFF
OFF
OFF
The inverter is initializing.
Warning.
Alarm.
COM Port is using.
CT/Meter Port is using.
Bluetooth Port is using.
COM Port is not used.
CT/Meter Port is not used.
Bluetooth Port is not used.
Blue
Solid ON
Blue
Solid ON
Blue
Solid ON
COM
CT/Meter
Bluetooth
Display
screen
Today/kWh
Power/kW
XXXX
8888
kW
.
kWhToday
Power
Power
Blue
Flashing
Normally Operating.
8888
kW
.
kWhToday
Power
8888
kW
.
kWhToday
Powe r
Display
screen
Power
COM
Bluetooth
CT/Meter
There are four indicators on the Solis S6-GR1P(2.5-6)K-S Series Inverter(Power, COM,
CT/Meter and Bluetooth) which indicate the working status of the inverter.
3. Overview User Manual
9
NOTE:
COM/CT/Meter/Bluetooth indicators will automatically turn off after 2 minutes.
The Power indicator will remain on with lower brightness.
Shortpress the Power indicator can wake up all indicators.
NOTE:
Long press the Power button for 5 seconds to reset the bluetooth connection
passwords. If the reset is successful, the Power button will be flashing in Blue
color and in 0.5s interval for 3s. If the reset is failed, the Power button will be
flashing in Yellow color and in 0.5s interval for 3s.

To select a location for the inverter, the following criteria should be considered:
Exposure to direct sunlight will increase the operational temperature of the inverter and
may cause output power limiting. Recommends inverter installed to avoid direct sunlight
or raining.
To avoid over heating ambient air temperature must be considered when choosing
the inverter installation location. Recommends using a sun shade minimizing
direct sunlight when the ambient air temperature around the unit exceeds 104°F/40°C.
4.1 Select a Location for the Inverter
Figure 4.1 Recommended Installation locations
WARNING: Risk of fire
Despite careful construction, electrical devices can cause fires.
Do not install the inverter in areas containing highly flammable materials or
gases.
Do not install the inverter in potentially explosive atmospheres.
The mounting structure where the inverter is installed must be fireproof.
4. Installation User Manual
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Do not install in small closed spaces where air can not circulate freely. To avoid
overheating, always make sure the flow of air around the inverter is not blocked.

Figure 4.2 Inverter Mounting clearance
Install on a wall or strong structure capable of bearing the weight.
Install vertically with a maximum incline of +/- 5°.If the mounted inverter is tilted to an
angle greater than the maximum noted, heat dissipation can be inhibited, and may result
in less than expected output power.
When 1 or more inverters are installed in one location, a minimum 12inchs clearance
should be kept between each inverter or other object. The bottom of the inverter should
be 20inchs clearance to the ground.
300mm
500mm
500mm
300mm 300mm
300mm
300mm
Visibility of the LED status indicator lights.
Adequate ventilation must be provided if the inverter is to be installed in a confined space.
NOTE:
Nothing should be stored on or placed against the inverter.
4. Installation User Manual
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Figure 4.3 Inverter wall mounting
Please see Figure 4.4 and Figure 4.5 for instruction on mounting the inverter..
.The inverter shall be mounted vertically. The steps to mount the inverter are listed below
1. According to the figure 4.2, select the mounting height of the bracket and mark the
mounting holes. For brick walls, the position of the holes should be suitable for the
expansion bolts.
2. M ake sure the bracket is horizontal. And the mounting holes (in Figure 4.4) are marked
correctly. Drill the holes into wall at your marks.
3. Use the suitable expansion screws to fix the bracket on the wall.
Figure 4.4 Inverter wall mounting
4.2 Mounting the Inverter
Dimensions of mounting bracket:
Suitable fixing screws
Bracket
4. Installation User Manual
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Figure 4.5 Wall Mount Bracket
WARNING:
The inverter must be mounted vertically.
4. Lift up the inverter (be careful to avoid body strain), and align the back bracket on the
inverter with the convex section of the mounting bracket. Hang the inverter on the
mounting bracket and make sure the inverter is secure (see Figure 4.5).
Locking screws
5. Use M4*9 screws in accessory to lock the inverter to the mount bracket.
4. Installation User Manual
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4.3 Electrical Connections
Inverter designs quick-connect terminal, so top cover needn't open during electrical
connection. The sign meaning located the bottom of inverter, as shown below in table 4.1.
All electrical connections are suit for the local or national standard.
NOTE:
Before connection, please make sure the polarity of the output voltage of
PV array matches theDC+andDC-symbols.
WARNING:
Please don’t connect PV array positive or negative pole to the ground,
it could cause serious damages to the inverter.
+
-
DC 1
DC 2
DC SWITCH
COM
GRID
Positive DC input terminal
Negative DC input terminal
Connecting terminal of the Grid
Switch of DC input terminals
RJ45 and terminal block for RS485 communication port
DC input terminal
DC input terminal
Table 4.1 Electrical connection symbols
The electrical connection of the inverter must follow the steps listed below:
1. Switch the Grid Supply Main Switch (AC) OFF.
2. Switch the DC Isolator OFF.
3. Assemble PV input connector to the Inverter.
4.3.1 Connect PV side of inverter
Before connecting inverter, please make sure the PV array open circuit
voltage is within the limit of the inverter.
4. Installation User Manual
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7±0.5mm
Please complete the assembling of the DC cable according to below procedures:
Step 1: Choose a proper DC cable and strip about 7+/-0.5mm, refer to the following table
for specifications.
4.0~6.0 4.0(12AWG)
(12~10AWG)
Cable type
Cross section(mm²)
Range
Industry generic PV cable
（model:PV1-F）
Recommended value
Figure 4.6 Strip
Step 2: take out the DC connector from the accessory bag, rotate the nut to remove it and
take out the waterproof rubber ring.
Positive
Negative
Nut Waterproof rubber ring
Figure 4.7 Remove the cover of the terminal connector
Step 3: Pass the stripped DC cable through the nut and waterproof rubber ring.
Figure 4.8 Pass the cable trough
Positive
Negative
4. Installation User Manual
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Step 5: Insert the crimped DC cable firmly into the DC terminal, then insert the waterproof
rubber ring into the DC terminal and tighten the nut.
After hearing the "click" sound, gently pull to check whether the engagement is firm.
Criew
Figure 4.10 Assemble the cover of the terminal connector
Step 4: Connect the conductor part of the DC cable to the metal DC terminal and press it
with the DC terminal crimping tool.
Figure 4.9 Crimp
Positive
Negative
Click
Limit snaps
crimpDON'T
Crimp
CAUTION!
Positive
Negative
OR
Crimp
Positive
Negative
4. Installation User Manual
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Step 6: Use a multimeter to measure the DC input voltage and verify the polarity of the
DC input cable.
+
-
Figure 4.11 multi-meter measurement
Step 7: Connect the assembled DC terminal to the inverter as shown in the figure, and a
slight "click" will be heard, proving that the connection is correct.
Figure 4.12 connect to the inverter
Click
CAUTION:
If DC inputs are accidently reversely connected or inverter is faulty or not
working properly, it is NOT allowed to turn off the DC switch. Otherwise it may
cause DC arc and damage the inverter or even lead to a fire disaster.
The correct actions are:
*Use a clip-on ammeter to measure the DC string current.
*If it is above 0.5A, please wait for the solar irradiance reduces until the
current decreases to below 0.5A.
*Only after the current is below 0.5A, you are allowed to turn off the DC
switches and disconnect the PV strings.
* In order to completely eliminate the possibility of failure, please disconnect
the PV strings after turning off the DC switch to aviod secondary failures due
to continuous PV energy on the next day.
Please note that any damages due to wrong operations are not covered in
the device warranty.
4. Installation User Manual
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2.5~6.0 6.0
Cable type
Cross section（mm²）
Range
Industry generic P V cable
Recommended value
Table 4.2 Grid cable size
Figure 4.13 AC Grid Terminal Connector Inside
Each Solis S6 Single Phase Inverter is supplied with an AC grid terminal connector.
Figure 4.14 AC Grid Terminal Connector
4.3.2 Connect grid side of inverter
For all AC connections, 2.5- 6mm cable is required to be used. Please make sure the
2
resistance of cable is lower than 1 ohm. If the wire is longer than 20m, it's recommended
to use 6mm cable.
2
There are"L","N","PE"symbols marked inside the connector, the Line
wire of grid must be connected toLterminal, the Neutral wire of grid must
be connected to "N" terminal and Earth wire must be connected to "PE".
Code end terminal
Body Seal body Claw Nut
4. Installation User Manual
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The steps to assemble the AC grid terminal connectors are listed as follows:
1. Disassemble the AC connector. Strip the AC wires about 7mm.
Figure 4.15 Stripped AC Wires
Figure 4.16 Connect Wires to the Terminal
Figure 4.17 Tighten up the Cap on the Terminal
2. Fix the wires into the correct postion. Torque 0.8N.m
Please try to pull out the wire to make sure the it’s well connected.
3. Insert Seal and Clamp Finger into body ,then tighten the nut, torque 2.5+/-0.5N·m.
Locker
Housing
4. Installation User Manual
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