SOLIS 4G series User manual

User Manual
for 4G Series Grid Inverter - Solis-1P(3.6-5)K-4G-US
Version 1.0, Release Date: 12,2022
Applicable Models
Solis-1P3.6K-4G-US
Solis-1P5K-4G-US
Applicable System
Single phase Grid-Tie system

● 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

Table of Contents
10 Appendix
9 Specifications
8 Troubleshooting
7 Maintenance
6 Operation
5 Start and Stop
4 Installation
3 Overview
2 Safety Instructions
1 Introduction

Contents
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
3.2 LED Status Indicator Lights
3.3 Keypad
3.4 LCD
4. Installation
4.1 Select Location for the Inverter
4.2 Mounting the Inverter
4.3 Electrical Connections
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5. Start & Stop
5.1 Start-up procedure
5.2 Shutdown procedure
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1.1 Product Description 1
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1.2 Inverter Knockouts 3
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3.5 Wiring Circuit Diagram 9
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1.4 Packaging 4
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1.5 Tools Required for Installation 4
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1.6 Storage 5
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2.4 Notice For Disposal 7
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1.3 Wiring Box Interior View

Contents
6. Operation 23
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6.1 Main Menu
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6.2 Information
6.3 Settings
6.4 Advanced Info.
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6.5 Advanced Settings 29
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7. Maintenance
8. Troubleshooting
9. Specifications
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6.6 ARC Fault ……………………………………………

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1. Introduction User Manual
Wiring box
LCD display
4 buttons
LED lights
Figure1.1 Front view of inverter and and Wiring box (The wiring box components
1.1 Product Description
Solis single phase US series inverters can invert the DC power from (PV) solar modules
into AC power which can support home loads and feed back to the grid.
This product manual is valid for the below listed Solis 1φ inverters
1- Solis-1P3.6K-4G-US
2- Solis-1P5K-4G-US
vary based on the MLRSD transmitter choice)
1.1.1 Front View of the inverter

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DC Switch RS 485
DC input
AC input
Meter
1. Introduction User Manual
1.1.2 Bottom and Side View
Figure1.2 Bottom view
Figure1.3 Side view (Right) and back view (left) of the inverter

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1. Introduction User Manual
Table 1.1 Knockout quantity and size
The inverter comes equipped with the following knockouts at the bottom, back and
the side of the wiring box, Adding additional knockouts shall void the inverter warranty
1.2 Inverter Knockouts
Location Quantity Size of Conduit Purpose
Bottom 2 1 x 3/4"
1 x 3/4"
Knockout for DC input, DC input
and communication cable
Right Side 1 1 x 3/4" knockout for AC output cable
Left Side 1 1 x 3/4" knockout for DC input cable
1.3 Wiring Box Interior View
Grounding
Terminal
DC Wiring
Terminal
AC Wiring
Terminal
Internal DC Wiring Internal AC Wiring
Internal
COM Wiring
Figure1.4 Inside the Wiring Box (RSD Transmitter device can vary)
Tigo
Transmier

4
1.4 Packaging
When you receive the inverter, ensure a thorough inspection for any visible damage to
the packing case or the products and ensure that all the parts listed below are included:
1. Introduction User Manual
4
1.5 Tools Required for Installation
Technician Screwdriver Phillips Screwdriver Wire Strippers 12AWG to 6AWG Wire Strippers 20AWG to 10AWG
Drill and Impact Driver
Mulmeter (AC/DC amps)
Channel Locks
Smart Phone
Torque Wrench Screwdriver
In case of any damage and missing component, contact Solis US Service team at
[e-mail]
Manual
Inverter x1
Expansion screws x3
Locking screws x1 Manual x1
Mounting bracket x1

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1. Introduction User Manual
1.6 Storage
● Use the original packing box with the desiccant inside to pack the inverter.
Store the inverter in a clean and dry place, free of dust and dirt. The storage temperature ●
must be between -13°F to 176°Fand 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.
Improper use may result in potential electric shock hazards or burns. This manual contains ●
important instructions that should be followed during installation and maintenance.
SAVE THESE INSTRUCTIONS – This manual contains important instructions for the following
models that shall be followed during installation and maintenance of the inverter
Solis-1P3.6K-4G-US
Solis-1P5K-4G-US
If the inverter is not installed immediately, the following storage instructions and environmental
conditions must be followed

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2. Safety & Warning
2.1 Safety Symbols
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 equipment or property damage
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.
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 in a place inaccessible to 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
2.4 Notice for Disposal
This product shall not be disposed of with household waste. It must
be segregated and brought to an appropriate disposal facilityto ensure
proper recycling. This it to be done in order to avoid negative impacts
on the environment and human health. Local waste management rules
shall be observed and respected.

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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.
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
Table 3.1 Status Indicator Lights
Figure 3.1 Front Panel Display
3. Overview User Manual

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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 inverter menus (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
3.5 System Diagram

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To select a location for the inverter mounting for safe operation and easy maintenance,the following
criteria should be considered:
The ambient temperature and relative humidity should meet the following requirements.
Operating Temperature Range: -13°F to 140°F (-25°C to 60°C)
Relative Humidity: 0~95%
It is recommended to use a sun shade minimizing direct sunlight when the ambient air
temperature around the unit exceeds 104°F/40°C.
To avoid overheating, always make sure there is enough free space for air circulation
around the inverter .
Exposure to direct sunlight will increase the operational temperature of the inverter
and may limit the output power. Thus it is recommended to protect the inverter
against direct sunlight or rain or snow.
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.
4. Installation
4.1 Select a Location for the Inverter
User Manual
Figure 4.1 Recommended Installation locations
≥15°
Indoor Direct Sun
Shade Cover
Shade Cover
Direct Rain
Rating
NEMA 4X

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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.
4. Installation
Figure 4.2 Inverter Mounting Clearance
12 in (300mm)
It is not recommended that the inverter is installed in living areas to avoid building
users to be bothered by inverter noise during operaon.
For multiple adjacent inverters, a minimum clearance of 12 inches should be kept
between each inverter or other objects to have adequate air flow. The bottom of the
inverter should have 20 inches of clearance to the ground as shown below.
Install vertically with a maximum incline of +/- 5°. If the mounted inverter is tilted
to an angle greater than than +/- 5°, heat dissipation will be inhibited, and may
result in derating.
The inverter should be installed in a place that is inaccessible to the children.
Install on a wall or strong structure that is capable of bearing the weight.
Figure 4.2 Minimum clearance between inverters or other objects
User Manual
12 in (300mm)12 in (300mm)
12 in (300mm)
12 in (300mm)
20 in (500mm)
20 in (500mm)

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4.2 Mounting the Inverter
Dimensions of mounting bracket:
4. Installation User Manual
Figure 4.4 Inverter Wall Mounting
Figure 4.3 Inverter Wall Mounting
Please see Figure 4.4 and Figure 4.5 for instruction on mounting the inverter to a wall. The
inverter shall be mounted vertically. The steps to mount the inverter are listed below:
Suitable fixing screws
Bracket
2.Ensure the bracket is horizontal and the mounting holes (in Figure 4.4 and Figure 4.5)
are marked correctly. Drill the holes into the wall or pillar as marked.
3. Use the expansion screws marked in figure 4.4 to fix the bracket to the wall.
1. According to the figure 4.3, 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.

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4. Installation User Manual
Figure 4.5 Inverter Pillar Mounting
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 ensure the inverter is secure (see Figure 4.5)
CAUTION
It is recommended that at least 2 qualified personnel lift the inverter to
avoid any personal injury.
5. Use M4*9 screws in accessory to lock the inverter to the mount bracket.
Figure 4.6 Fix the Inverter
Locking screws

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4. Installation User Manual
4.3 Electrical Connections
Remove the four screws on both sides of the wiring box with the screw driver, then
remove the cover.
Figure 4.7 Wiring Box
WARNING
Only qualified personnel can perform the electrical work. All electrical
connections must be terminated in accordance with local and national standards.
Screwdriver
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.
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.
NOTE
Press on the wiring box cover while loosening the screws. This action will help to
avoid damaging the screw threads.
WARNING
The PV strings generate high voltage so make sure the inverter is isolated from
any DC and AC power before making any electrical connecons

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4. Installation User Manual
Warning
Before connecting the inverter, ensure the PV string 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. check the
ground fault This can cause serious damage to the inverter.
Strip the end of the wire 1/4” minimum to 3/4” maximum. Use a slotted (technician)
screwdriver,insert the screwdriver in Terminal A (top) and insert the wire into Terminal B
(bottom) of the spring clamp terminal. While holding the wire in place, remove
the screwdriver and the spring clamp terminal will fix the wire in place. Use the labels
on the wiring block to ensure proper polarity and a multi-meter to verify the PV polarity.
Before connection, ensure the PV array strings are correct polarity
and match the proper “DC+” and “DC-“ symbols you will connect them to.
4.3.2 Connect PV Side of Inverter
4.3.1 Terminal Connections
Figure 4.8 Connection Area of Inverter
Terminal A
Terminal B