SOLIS 4G series User manual

User Manual
for 4G Series Grid Inverter
Version 1.0, Release Date: 09,2022
Applicable models
Solis-1P2.5K-4G-US
Solis-1P3K-4G-US
Solis-1P3.6K-4G-US
Solis-1P3.8K-4G-US
Solis-1P4K-4G-US
Solis-1P4.6K-4G-US
Solis-1P5K-4G-US
Solis-1P6K2-4G-US
Applicable System
Single phase system

3
5
7
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9
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11
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5
3
4
7
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1.1 Product Description
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1. Introduction
1.2 Packaging
2. Safety & Warning
2.1 Safety Symbols
2.2 General Safety Instructions
3. Overview
3.1 Front Panel Display
3.2 LED Status Indicator Lights
4. Installation
4.1 Select a Location for the Inverter
4.2 Mounting the Inverter
4.3 Electrical Connections
4.3.1 Terminal Connections
Contents
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2.3 Notice For Use 6
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1.3 Storage
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3.3 Keypad
3.4 LCD
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4.3.2 Connect PV Side of Inverter ……………………………………………………………………………………
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4.3.3 Connect Grid Side of Inverter …………………………………………………………………………………
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4.3.4 Ground Connection …………………………………………………………………………………………………
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4.3.5 Max. Overcurrent Protection Device (OCPD) ………………………………………………
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4.3.6 Inverter Monitoring Connection ………………………………………………………………………………
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4.3.7 Module Level Rapid Shutdown (Optional) …………………………………………………………
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4.3.8 Meter Connection(optional) ……………………………………………………………………………………
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5. Start & Stop
5.1 Start-up procedure
5.2 Shutdown procedure
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6. Operation
6.1 Main Menu
6.2 Information
6.2.1 Lock Screen
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6.3 Settings
6.3.1 Set Time …………………………………………………………………………………………………………………………
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6.3.2 Set Address ……………………………………………………………………………………………………………………

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Contents
6.4 Advanced Info.
6.4.1 Alarm Message
6.4.3 Version
6.4.4 Daily Energy
6.4.5 Monthly Energy
6.4.2 Running Message
6.4.7 Daily Records
6.4.8 Communication Data
6.4.9 Warning Message
6.4.6 Yearly Energy
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6.5.4 Reset Password
6.5.6 Calibrate Energy
6.5.8 STD.Mode Settings
6.5.9 Restore Settings
6.5.12 Export Power Set
6.5.14 Debug Parameter
6.5.16 Compensation Set
6.5.11 Internal EPM Set
6.5.13 Restart HMI
6.5.15 DSP Update
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6.6 Advanced Settings
8. Troubleshooting ……………………………………………………………………………………………………………… 51
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9. Maintenance
7. Maintenance ……………………………………………………………………………………………………………………… 50
6.5 Advanced Settings
6.5.1 Select Standard
6.5.2 Grid ON/OFF
6.5.3 Clear Energy
6.5.5 Power Control
6.5.7 Special Setting
6.5.10 HMI Update

1. Introduction
1.1 Product Description
Solis single phase US series inverters can transfer DC power from PV panels into AC
power and feed into the grid.
Solis single phase US series inverters contain 8 models which are listed below:
Solis-1P2.5K-4G-US, Solis-1P3K-4G-US, Solis-1P3.6K-4G-US, Solis-1P3.8K-4G-US,
Solis-1P4K-4G-US, Solis-1P4.6K-4G-US,Solis-1P5K-4G-US, Solis-1P6K2-4G-US
Figure1.1 Front side view(Left) and Bottom side view(Right)
3
DC Input AC GridMeter
Wiring box
LCD display
4 buttons
LED lights
RS485 DC Swtich
User Manual

1.2 Packaging
When you receive the inverter, ensure that all the parts listed below are included:
Manual
Inverter x1
Mounting bracket x1 Expansion screws x3
Locking screws x2 Manual x1
1.3 Storage
● 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 40~176°F and humidity should be between 0 to 95%, non-condensing.
● Do not stack more than four (4) inverters high on a single pallet.
● 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.
If the inverter is not installed immediately, storage instructions and environmental conditions are below:
1. Introduction User Manual
4

2. Safety & Warning
2.1 Safety Symbols
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.
Safety symbols used in this manual, which highlight potential safety risks and important
safety information, are listed as follows:
WARNING:
WARNING symbol indicates important safety instructions, which if not
correctly followed, could result in serious injury or death.
2.2 General Safety Instructions
WARNING:
Electrical installations must be done in accordance with the local and national
electrical safety standards.
WARNING:
Do not connect PV array positive(+) or negative(-) to ground, it may
cause serious damage to the inverter.
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 single phase inverters feature an
integrated DC switch.
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. 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 inverter must be installed according to the correct technical specifications.
5. 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.
CAUTION:
The PV array (solar panels) supplies a DC voltage when they are exposed to
sunlight.
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 reach up to 75℃ (167 F).
To avoid risk of burns, do not touch the surface of the inverter while it’s operating.
Inverter must be installed out of the reach of children.
CAUTION:
Risk of electric shock. Do not remove cover. There is no user serviceable
parts inside. Refer servicing to qualified and accredited service technicians.
2. Safety & Warning User Manual
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3.1 Front Panel Display
3.2 LED Status Indicator Lights
There are three LED status indicator lights in the front panel of the inverter. Left LED:
POWER LED (red) indicates the power status of the inverter. Middle LED: OPERATION
LED (green) indicates the operation status. Right LED: ALARM LED (yellow) indicates
the alarm status. Please see Table 3.1 for details
Description
The inverter detects DC power.
No DC power or low DC power.
The inverter is operating properly.
The inverter has stopped to supply power.
The inverter is initializing.
Alarm or fault condition is detected.
No fault or alarm is detected.
Status
ON
OFF
ON
OFF
OFF
ON
FLASHING
Light
POWER
OPERATION
ALARM
Table 3.1 Status Indicator Lights
Figure 3.1 Front Panel Display
3. Overview User Manual
7

3.3 Keypad
3.4 LCD
There are four keys in the front panel of the inverter (from left to right):
ESC, UP, DOWN and ENTER keys. The keypad is used for:
Scrolling through the displayed options (the UP and DOWN keys);
Access to modify the adjustable settings (the ESC and ENTER keys).
The two-line Liquid Crystal Display (LCD) is located on the front panel of the Inverter,
which shows the following information:
Inverter operation status and data;
Service messages for operator;
Alarm messages and fault indications.
3. Overview User Manual
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To select a location for the inverter, the following criteria should be considered:
To avoid over heating ambient air temperature must be considered when choosing
the inverter installation location. Ginlong recommends using a sun shade minimizing
direct sunlight when the ambient air temperature around the unit exceeds 104°F/40°C.
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.
Exposure to direct sunlight will increase the operational temperature of the inverter
and may cause output power limiting. Ginlong recommends inverter installed to avoid
direct sunlight or raining.
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.
Figure 4.1 Recommended installation position
4. Installation
4.1 Select a Location for the Inverter
User Manual
9

Visibility of the LED status indicator lights and the LCD located at the front panel of
the inverter should be considered.
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.
12in
20in 20in
12in 12in
12in 12in
Figure 4.2 Inverter Mounting Clearance
When one or more inverters are installed in one location, a minimum of 12inches of
clearance should be kept between each inverter or other objects. The bottom of the
inverter should have 20 inches of clearance to the ground.
Install vertically with a maximum incline of +/- 5°. If the mounted inverter is tilted to an
angle greater than the maximum noted, heat dissipation will be inhibited, and may
result in power limiting.
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. Make 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
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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).
5. Use M4*9 screws in accessory to lock the inverter to the mount bracket.
Figure 4.6 Fix the Inverter
Locking screws
4. Installation User Manual
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Before making electrical connections, double check to ensure the steps below are strictly
followed:
a. Switch the Grid Supply Main Switch (AC) OFF.
b. Switch the DC Switch OFF.
Please see figure 4.7,there are four knockouts in the wiring box. The two knockouts on
the left (bottom and side) are for the DC conduit entry. The two knockouts on the right
(bottom and side) are for the AC conduit entry. All knockouts in the wiring box can accept
trade size 1 inch (ID) conduit.
4.3 Electrical Connections
Place the wiring box cover on the wiring box ensuring it is oriented correctly and start the
screws. Apply pressure to the cover and tighten the screws in a cross pattern.
Tighten screws to 1.7 N⋅m or 15.05 In-Lbs torque settings.
Figure 4.7 Bottom Side of Inverter
4. Installation User Manual
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Warning:
Before connecting inverter, ensure the PV array open circuit voltage is
within the limit of the inverter. Otherwise the inverter could be damaged.
DO NOT connect the PV array positive or negative to ground.
This can cause serious damage to the inverter.
Strip the end of the wire ¾” minimum to 1” maximum. Use a slotted (flat-blade)
screwdriver, insert the screwdriver in Terminal A (top) and insert the wire into Terminal B
(bottom) of the Rapid Termination wiring block. While holding the wire in place, remove
the screwdriver and the Rapid Termination spring terminal block will fix the wire in place.
Use the labels on the Rapid Termination wiring block to ensure proper polarity.
Before connection, ensure the PV array strings are correct polarity
and match the proper “DC+” and “DC-“ symbols you will connect them to.
Use qualified DC cable for PV system.
The inverter cannot accept PV strings wired in parallel.
4.3.2 Connect PV Side of Inverter
Figure 4.8 Connection Area of Inverter
4.3.1 Terminal Connections
Terminal A
Terminal B
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Damage to the DC disconnect due to enlarged knockouts.
Enlarged knockouts enable moisture to penetrate the DC disconnect which
could damage electronic components in the DC Disconnect.
Pleaserefertofigure4.8,The acceptable wire size range is from 12 AWG to 10 AWG,
copper conductors only; refer to local code for appropriate wire size.
Cable type
4.0-6.0
(12-10AWG)
Cross section
Range
Industry generic PV cable
（model:PV1-F）
Recommended
value
4.0
(12AWG)
Table 4.1 DC cable size
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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The Solis Single Phase inverters can be connected to a 208V or 240V grid.
The default setting is for a 240VAC single phase grid.
Ground must be connect to the PE terminal.
Cable type
4-25mm²
(12-4AWG)
Cross section
Range
Industry generic
grid cable
Recommended
value
10-25mm²
(8-4AWG)
4.3.3 Connect Grid Side of Inverter
Table 4.2 Grid cable size
Table 4.3 Grid Terminal Connection
L1
L2L3
L1
L2
N
208V~
3PH-△-3W SPLIT-PHASE
240V~
L1 L2 NL1 L2 N
Yes Yes No Yes Yes No
Connection requiement
TERMINAL
Please see figure 4.9. Both DC and AC ground cable can be connect to ground terminal
above DC switch. The acceptable wire size for ground is 12AWG to 4 AWG. The torque
setting is 26 in-lbs (3 Nm) .
4.3.4 Ground Connection
Internal ground connection point
There are two cable connection point for each phase, one for grid, one for AC power
of RSD.
4. Installation User Manual
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GRID
STANDARD

Figure 4.9 Grounding Terminal on Heat-Sink
An external ground connection is provided at the right side of the inverter.
Prepare OT terminals: M4. Use proper tooling to crimp the lug to the terminal.
Connect the OT terminal with ground cable to the right side of the inverter.
The torque setting is 20 in-lbs (2Nm).
External ground connection point
Figure4.10Connect the External Grounding Conductor
4. Installation User Manual
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To protect the inverter's AC grid connection conductors, Solis recommends installing
breakers that will protect against overcurrent. The following table defines OCPD ratings
for the Solis single phase inverters.
4.3.5 Max. Overcurrent Protection Device (OCPD)
Table 4.4 Rating of Grid OCPD
Inverter Rated
voltage(V)
Max. output
current (A)
Current for protection
device (A)
10.4/12.0
15.0/17.3
16.7/19.2
12.5/14.4
Solis-1P4K-4G-US
Solis-1P3.6K-4G-US
Solis-1P3K-4G-US
Solis-1P2.5K4-4G-US
19.2/22.1Solis-1P4.6K-4G-US 240/208
240/208
240/208
240/208
240/208
30/30
30/30
20/30
20/20
20/20
20.8/24.0Solis-1P5K-4G-US
25.0/25.0Solis-1P6K2-4G-US 240/208
240/208
40/40
30/40
15.8/18.3Solis-1P3.8K-4G-US 240/208 30/30
4. Installation User Manual
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4.3.6 Inverter Monitoring Connection
The inverter can be monitored via Wi-Fi or Cellular.
All Solis communication devices are optional (Figure 4.11).
For connection instructions, please refer to the Solis Monitoring Device installation manuals.
Figure 4.11 Wi-Fi Communication Function
4.3.7 Module Level Rapid Shutdown (Optional)
For systems that are required to meet NEC 2017 NEC 690.12, Solis has an optional
Module Level Rapid Shutdown. This product provides a panel level shutdown feature
that brings the panel voltage to a safe level in case of a disaster situation.
This function is vital for the safety of firefighters and relevant personnel.
NOTE:
The Solis Transmitter inside the inverter is compatible with any module level
rapid shutdown devices that comply with the Sunspec requirements.
The detailed installation please refer to the user manual of module level
rapid shutdown devices.
If Tigo transmitter is installed inside the inverter wiring box, customer
must install corresponding Tigo module level rapid shutdown devices.
Please consult Tigo for detailed instructions.
Internet
GPRS monitoring
Wi-Fi monitoring
Smart phone monitoring
PC monitoring
Web server
Router
Wi-Fi monitoring
Wi-Fi box
4. Installation User Manual
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