SOLIS S6-GC25K-US User manual

User Manual
for S6 Series Grid Inverter
Version 1.0, Release Date: 08,2023
Applicable models
S6-GC25K-US
S6-GC33K-US
S6-GC36K-US
S6-GC40K-US
S6-GC50K-US
S6-GC60K-US
S6-GC-30K-LV-US

● Product specifications are subject to change without notice. Every attempt has been made
to make this document complete, accurate and up-to-date. Individuals reviewing this
document and installers or service personnel are cautioned, however, that Solis
reserves the right to make changes without notice and shall not be responsible for any
damages, including indirect, incidental or consequential damages caused by reliance
on the material presented including, but not limited to, omissions, typographical errors,
arithmetical errors or listing errors in the material provided in this document.
● Solis accepts no liability for customers' failure to comply with the
instructions for correct installation and will not be held responsible for upstream or
downstream systems Solis equipment has supplied.
● The customer is fully liable for any modifications made to the system; therefore,
any hardware or software modification, manipulation, or alteration not expressly
approved by the manufacturer shall result in the immediate cancellation of the warranty.
● Given the countless possible system configurations and installation environments, it is
essential to verify adherence to the following:
● There is sufficient space suitable for housing the equipment.
● Airborne noise produced depending on the environment.
● Potential flammability hazards.
● Solis will not be held liable for defects or malfunctions arising from:
● Improper use of the equipment.
● Deterioration resulting from transportation or particular environmental conditions.
● Performing maintenance incorrectly or not at all.
● Tampering or unsafe repairs.
● Use or installation by unqualified persons.
● This product contains lethal voltages and should be installed by qualified electrical or
service personnel having experience with lethal voltages.
Important notes

10 Appendix
9 Specifications
8 Troubleshooting
7 Maintenance
6 Normal Operation
5 Commissioning
4 Communication
3 Installation
2 Safety
1 Introduction
Table of Contents

Table of Contents
1. Introduction
1.1 Product Description
1.4 Unpacking
1.7 Storage
2. Safety Instruction
2.1 Safety symbols
2.2 General safety instructions
2.3 Notice for use
2.4 Protection Circuitry and Controls
3. Installation
3.1 Environmental considerations
3.1.1 Select a location for the inverter
3.1.2 Other environmental considerations
3.2 Product handling
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3.3 Mounting the Inverter
1
1
3
5
6
6
6
7
7
8
8
8
9
11
12
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13
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3.3.1 Wall mounting
16
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5. Commissioning
5.1 Selecting the appropriate grid standard
5.1.1 Verifying grid standard for country of installation
31
31
31
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5.2 Changing the grid standard
5.2.1 Procedure to set the grid standard
5.3 Setting a custom grid standard
5.4 Preliminary checks
5.4.3 DC Connections
5.4.4 AC Connections
5.4.1 DC configuration
31
31
32
33
33
34
34
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5.4.2 AC configuration
34
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6. Normal operation
6.1 Start-up procedure
6.2 Shutdown procedure
35
35
35
6.3 Main Menu 36
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3.3.2 Rack mounting
3.4 Electrical Connections 19
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20
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3.4.1 Grounding
22
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3.4.2 Connect PV side of inverter
24
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3.4.3 Connect grid side of inverter
29
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4. Communication & Monitoring
4.1 RS485 communication 29
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1.2 Front Panel Display ……………………………………………………………………………………… 2
1.3 LED Status Indicator Lights
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2
1.6 Tools Required for Installation
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4
1.5 Inverter Circuit Diagram
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4
1.8 Notice of Disposal
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5
36
6.4 Information …………………………………………………………………………………………………………

Table of Contents
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6.5.1 Set Time 38
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6.5.2 Set Address 38
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6.6 Advanced Info - Technicians Only 39
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6.6.1 Alarm Message 39
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6.6.2 Running Message 39
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6.6.3 Version 40
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6.6.4 Daily Energy
40
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6.6.5 Monthly Energy
40
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6.6.6 Yearly Energy
41
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6.6.7 Daily Records
41
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6.6.8 Communication Data
41
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6.6.9 Warning Message
41
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6.7 Advanced Settings - Technicians Only 42
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6.7.1 Selecting Standard 42
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6.7.2 Grid ON/OFF 44
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6.7.3 Clear Energy 44
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6.7.4 Reset Password 44
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6.7.5 Power control 45
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6.7.6 Calibrate Energy 45
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6.7.7 Special Settings
45
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6.7.8 STD Mode settings
46
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6.7.9 Restore Settings
56
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6.7.10 HMI Update
57
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6.7.11 External EPM Set
57
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6.7.12 Restart HMI
57
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6.7.13 Debug Parameter
58
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6.7.15 DSP Update 59
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6.7.16 Compensation Set 59
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6.7.17 I/V Curve
60
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6.7.14 Fan Test
58
7. Maintenance ……………………………………………………………………………………………………………………… 62
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7.1 Anti-PID Function 62
8. Troubleshooting ……………………………………………………………………………………………………………… 64
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8.1 Current Alarm 64
8.2 Alarm History 64
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8.3 Error Messages 64
9. Specifications …………………………………………………………………………………………………………………… 68
10. Appendix ……………………………………………………………………………………………………………………… 75
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7.2 Fan Maintenance 63
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6.5 Settings 38
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6.8 AFCI function 61
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6.4.1 Lock screen

1. Introduction
1.1 Product Description
1
User Manual
Figure 1.1 Front view
LED lights
LCD display
4 buttons
AC Switch
Solis Three phase Inverters convert DC power from the photovoltaic(PV) array
into alternating current(AC) power that can satisfy local loads as well as feed the power
distribution grid.
This manual covers the three phase inverter models listed below:
S6-GC25K-US, S6-GC33K-US, S6-GC36K-US, S6-GC40K-US,
S6-GC50K-US, S6-GC60K-US. S6-GC30K-LV-US
Figure 1.2 Bottom view
DC Switch
DC input Vent
COM
AC output
COM

1. Introduction
1.2 Front Panel Display
2
User Manual
Figure 1.3 Front Panel Display
Figure 1.4 Status Indicator LED
1.3 LED Status Indicator Lights
There are three LED status indicator lights in the front panel of the inverter.
POWER LED (red) indicates the power status of the inverter.
OPERATION LED (green) indicates the operation status.
ALARM LED (yellow) indicates the alarm status.
Description
The inverter detects DC power.
No DC power or low DC power.
The inverter is operating properly.
The inverter has stopped producing power.
The inverter is initializing| Updating software
Alarm or fault condition is detected.
No fault or alarm is detected.
Status
ON
OFF
ON
OFF
OFF
ON
FLASHING
Light
POWER
OPERATION
ALARM

1. Introduction User Manual
1.4 Unpacking
Inverter packing list
Part #
1
2
Description
Inverter
Mounting bracket
Quantity
1
1
Hex bolt M6*12
Remarks
The inverter ships with all accessories in one carton.
When unpacking, please verify all the parts listed below are included:
3
4
5-1
5-2
5-3
Fastening screw 2
DC connector
Hex bolt
Hex nut
Washer & Lock Washer
12 for 25K-40K
16 for 50K-60K
4
4
4
123
4
5
Hex bolt M10*40
3
DC connector
Staubli Electrical Connectors AG
PV-KBT4-EVO 2/6I-UR
PV-KST4-EVO 2/6I-UR

1. Introduction User Manual
1.5 Inverter Circuit Diagram
4
Technician Screwdriver Torqx T20 Screwdriver Wire Strippers
12AWG to 6AWG
Wire Strippers
20AWG to 10AWG
Drill and Impact Driver
Multimeter (AC/DC amps)
Channel Locks
LUG Crimping Tool
Torque Screwdriver MC4 Crimping Tool
1.6 Tools Required for Installation
Figure 1.5 Inverter Circuit Diagram

User Manual
● Use the original box to repackage the inverter, seal with adhesive tape with the desiccant
inside the box.
● Store the inverter in a clean and dry place, free of dust and dirt. The storage temperature
must be between -40~158°F and humidity should be between 0 to 100%, non-condensing.
● Do not stack more than two (2) inverters high on a single pallet. Do not stack more than
2 pallets high.
● Keep the box(es) away from corrosive materials to avoid damage to the inverter enclosure.
● Inspect the packaging regularly. If packing is damaged (wet, pest damages, etc.), repackage
the inverter immediately.
● Store inverters on a flat, hard surface -- not inclined or upside down.
● After 100 days of storage, the inverter and carton must be inspected for physical damage
before installing. If stored for more than 1 year, the inverter needs to be fully examined and
tested by qualified service or electrical personnel before using.
● Restarting after a long period of non-use requires the equipment be inspected and, in some
cases, the removal of oxidation and dust that has settled inside the equipment will be required.
1.7 Storage
If the inverter is not installed immediately, storage instructions and environmental conditions are listed below:
DO NOT STACK
MORE THAN HIGH
2
1. Introduction
SAVE THESE INSTRUCTIONS – This manual contains important instructions for Models
S6-GC25K-US, S6-GC33K-US, S6-GC36K-US, S6-GC40K-US, S6-GC50K-US, S6-GC60K-US
S6-GC30K-LV-US that shall be followed during installation and maintenance of the inverter.
5
1.8 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 Instruction User Manual
2.1 Safety symbols
Safety symbols used in this manual, which highlight potential safety risks and important safety
information, are listed below:
WARNING
Symbol indicates important safety instructions, which if not correctly
followed, could result in serious injury or death.
NOTE
Symbol indicates important safety instructions, which if not correctly
followed, could result in damage to or the destruction of the inverter.
CAUTION, RISK OF ELECTRIC SHOCK
Symbol indicates important safety instructions, which if not correctly
followed, could result in electric shock
CAUTION, HOT SURFACE
Symbol indicates safety instructions, which if not correctly
followed, could result in burns.
2.2 General safety instructions
WARNING
Do not connect PV array positive (+) or negative (-) to ground – doing
so could cause serious damage to the inverter.
WARNING
Electrical installations must be done in accordance with local and
national electrical safety standards.
WARNING
To reduce the risk of fire, branch circuit over-current protective
devices (OCPD) are required for circuits connected to the Inverter.
CAUTION
The PV array (solar panels) supplies a DC voltage when exposed to light.
CAUTION
The inverter's surface temperature can reach up to 75°C (167°F). To avoid
risk of burns, do not touch the surface when the inverter is operating.
Inverter must be installed out of the reach of children.
WARNING
The inverter can only accept a PV array as a DC input. Using any other
type of DC source could damage the inverter.
6

User Manual
CAUTION
Risk of electric shock from energy stored in the inverter's capacitors.
Do not remove cover until five (5) minutes after disconnecting all sources
of supply have passed, and this can only be done by a service technician.
The warranty may be voided if any unauthorized removal of cover occurs.
The inverter has been constructed according to applicable safety and technical guidelines.
Use the inverter in installations that meet the following requirements ONLY:
1). The inverter must be permanently installed.
2). The electrical installation must meet all the applicable regulations and standards.
3). The inverter must be installed according to the instructions stated in this manual.
4). The system design must meet inverter specifications.
To start-up the inverter, the Grid Supply Main Switch (AC) must be turned on, BEFORE the DC
Switch is turned on. To stop the inverter, see power down instruction on page 40 Section 6.2.
2.3 Notice for use
2.4 Protection Circuitry and Controls
To meet relevant codes and standards, the Solis U.S. three phase inverter line is
equipped with protective circuitry and controls. These include Arc Fault Circuit Interrupter
(AFCI) and Anti-Islanding Protection.
Arc Fault Circuit Interrupter AFCI:
Edition 2011 of the National Electrical Code®, Section 690.11, requires that all PV plants
attached to a building are fitted with a means of detecting and interrupting serial electric
arcs in the PV wiring and array. An electric arc with a power of 300W or greater must be
interrupted by the AFCI in the time specified by UL 1699B. A triggered AFCI fault may only
be reset manually. After clearing the source of the fault, the AFCI can be deactivated via
the inverter front panel interface.
Anti-Islanding Protection:
Anti-Islanding is a condition where the inverter cease to produce power when the grid
is not present. Circuitry, along with firmware, has been designed to determine if the grid is
present by adjusting the output frequency of the inverter. In the case of a 60Hz resonant
system where the inverter is partially isolated from the grid, the inverter programming can
detect if there is a resonant condition or if the grid is actually present. It can also
differentiate between inverter’s operating in parallel and the grid.
2. Safety Instruction
7

User Manual
3.1 Environmental considerations
3.1.1 Location selection for the inverter
When selecting a location for the inverter, consider the following:
● The temperature of the inverter heat-sink can reach 167°F.
● The ambient temperature and relative humidity should meet the following requirements.
● If multiple inverters are installed on site, a minimum clearance of 30 inches should be kept
between each inverter and all other mounted equipment. The bottom of the inverter should be
at least 30 inches above of the ground or floor (see Figure 3.1 and 3.2).
● The LED status indicator lights and the LCD located on the inverter's front panel should not be
blocked.
● Adequate ventilation must be present if the inverter is to be installed in a confined space.
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.
3. Installation
8
CAUTION, HOT SURFACE CAUTION, HOT SURFACE
● The load bearing structure shall meet the following requirements.
Made of non-inflammable materials
Max. load bearing capacity ≥ 4
times of inverter weight
●
●
Maximum Temperature Minimum Temperature
-24°F
-31°C
140°F
60°C
Max. Relative Humidity
100%
Non-Condensing
Maximum Altitude
13,123 feet
4,000 meters
NOTE
For additional installation details, watch the installation video in the link below
https://youtu.be/nkYMf-oukIw

User Manual
3. Installation
3.1.1.1 Examples of correct and incorrect installations
3.1.2 Other environmental considerations
3.1.2.1 Consult technical data
Consult the specifications section (section 9) for additional environmental conditions
(protection rating, temperature, humidity, altitude, etc.).
3.1.2.3 Vertical wall installation
For vertical installation, this model of Solis inverter should be mounted vertically
(90 degrees or backwards in less than or equal to 15 degrees).
Figure 3.1 Recommended Installation locations
≥15°
3.1.2.2 Horizontal installation
For horizontal installation, this model of Solis inverter should be mounted horizontally
(upwards in more than 15 degrees off the horizontal plane).
9
Indoor Direct Sun
Shade Cover
Shade Cover
Direct Rain
Shade Cover
Rating
NEMA 4X

User Manual
Figure 3.3 Distances required between inverters when multiple inverters are installed
3. Installation
≥30in
≥20in ≥20in
≥20in
Figure 3.2 Clearance distances requirement for the inverter
NOTE
Nothing should be stored on or placed against the inverter.
≥20in
≥20in
≥30in
≥20in
10
≥40in

User Manual
3.1.2.6 Flammable substances
Do not install near flammable substances. Maintain a minimum distance of three (3) meters
(10 feet) from such substances.
3.1.2.7 Living area
Do not install in a living area where the prolonged presence of people or animals is expected.
Depending on where the inverter is installed (for example: the type of surface around the
inverter, the general properties of the room, etc.) and the quality of the electricity supply, the
sound level from the inverter can be quite high.
3.2 Product handling
Figure 3.4 Handles used to move the inverter shown circled in red
3.1.2.5 Air circulation
Do not install in small, closed rooms where air cannot freely circulate. To prevent overheating,
always ensure that the air flow around the inverter is not blocked.
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 (see Figure 3.4).
2. Two people are required to remove the inverter from the shipping box. Use the handles
integrated into the heat sink to remove the inverter from the carton (see Figure 3.5).
3.1.2.4 Avoiding direct sunlight
Installation of the inverter in a location exposed to direct sunlight should to be avoided.
Direct exposure to sunlight could cause:
● Power output limitation (with a resulting decreased energy production by the system).
● Premature wear of the electrical/electromechanical components.
● Premature wear of the mechanical components (gaskets) and user interface.
3. Installation
11

User Manual
WARNING
Due to the weight of the inverter, contusions or bone fractures
could occur when incorrectly lifting and mounting the inverter.
When mounting the inverter, take the weight of the inverter into
consideration. Use a suitable lifting technique when mounting.
3.3 Mounting the Inverter
Figure 3.5 Inverter handles
The inverter can be mounted to the wall or metal array racking. The mounting holes should be
consistent with the size of the bracket or the dimensions shown in Figure 3.6.
3. Installation
12
Figure 3.6 Inverter wall mounting
500mm( in)19.68
10 mm1
( in)3.97
369mm(49.2in)
677.5mm(26.67in)
294mm(11.57in)
126 4.mm( 96in) 74mm
( 9 in)2. 1
10mm(0.39in)

User Manual
3.3.1 Wall mounting
3. Installation
13
1. Use the suitable mounting screws to attach the bracket on the wall.
Figure 3.8
2. Take off the Protective cover on the back of AC wiring box.
Figure 3.7 Inverter wall mounting
Bracket
Suitable mounting screws
Torque:22.1-25.8 ft.lbs
3. Take off the Protective cover in the side of inverter.
Figure 3.9

User Manual
3. Installation
14
4. Use the Connecting plate with screws to fix the AC wiring box on the bracket.
Figure 3.10
5. Lift the inverter and hang it on the bracket, and slide down to make sure they match
perfectly. Finally push the inverter to match the AC wiring box.
Figure 3.11

User Manual
3. Installation
15
6. Fix the AC wiring box to the inverter by screws.
Figure 3.12