SOLIS Solis-75K-5G-US - User Manual

SOLIS Solis-75K-5G-US

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User Manual

for 5G/S5 Series Grid Inverter

Version 1.6, Release Date: 02,2023

Applicable models

Solis-75K-5G-US

Solis-80K-5G-US

Solis-90K-5G-US

Solis-100K-5G-US

S5-GC75K-US

S5-GC80K-US

S5-GC90K-US

S5-GC100K-US

Applicable System

Three phase system

Table of Contents

Questions and Answers

N
Nicholas LaneSep 18, 2025
What does PV ISO-PRO 01/02 mean on my SOLIS Solis-75K-5G-US?
- E
  elizabethroachSep 18, 2025
  The PV ISO-PRO 01/02 error on your SOLIS Inverter indicates that the inverter detects low DC insulation resistance. Inspect the installation, reset the inverter, and note the weather conditions when the alarm occurs. Measure the insulation resistance; if it's normal, measure it again in the same weather conditions as when the alarm occurred. Physically check the cables. If the problem persists, replace the inverter.
C
Carl ScottAug 25, 2025
How to fix a NO-GRID error on a SOLIS Solis-75K-5G-US Inverter?
- R
  rodney61Aug 25, 2025
  If your SOLIS Inverter displays a NO-GRID error, it means the inverter isn't detecting the grid. To troubleshoot, with the DC switch OFF, check the AC voltage at the inverter test points (L-L, L-GND). Also, check the LCD reading, as there may be a bad measurement circuit. With the DC switch ON, check the grid standard. If the issue persists, replace the inverter.
V
Vickie GallegosAug 26, 2025
What to do if my SOLIS Solis-75K-5G-US shows 'Over Temperature'?
- J
  Joshua SchneiderAug 26, 2025
  If your SOLIS Inverter is showing an 'Over Temperature' error, check the ventilation around the inverter to ensure it's not obstructed. Also, verify whether the inverter is exposed to direct sunlight during hot weather.
T
Tyler KimAug 27, 2025
What to do if SOLIS Solis-75K-5G-US Inverter LCD has no power?
- J
  Julia BrightAug 27, 2025
  If your SOLIS Inverter's LCD has no power, check the PV input connections. Also, verify the DC input voltage (single phase >120V, three phase >350V) and ensure that the PV+/- connections are not reversed.
K
Kimberly TaylorSep 22, 2025
How do I resolve an INI-FAULT (Initialization Protection) error on my SOLIS Inverter?
- E
  Emily AdkinsSep 22, 2025
  The INI-FAULT error on your SOLIS Inverter indicates that the Master and Slave DSP have different values. To resolve this, reset the inverter by turning the DC switch OFF, waiting until all lights/LCD turn off, and then turning the DC switch ON. If the issue persists, replace the inverter.
M
Monica NorrisSep 23, 2025
Why is the screen blank on my SOLIS Inverter?
- L
  laurie57Sep 23, 2025
  If your SOLIS Inverter screen is blank, it could be due to low or missing input voltage, reversed polarity, or a damaged main board. To troubleshoot, with the DC switch OFF, test the PV connections, check the polarity, and ensure the voltage is greater than 200V. With the DC Switch ON, check the voltage again to ensure it's greater than 200V. If the DC voltage is "0", replace the inverter.
D
Dawn AguirreSep 9, 2025
What to do if a SOLIS Inverter shows UN-G-V (Under Grid Voltage) error?
- M
  Marie BradfordSep 10, 2025
  If your SOLIS Inverter is showing a UN-G-V error, it means the inverter detects the grid voltage as being too low. To troubleshoot, with the DC switch OFF, check the AC voltage at the inverter test points. If the AC voltage measures low, adjust the lower limit with permission from the utility. Also, check the LCD voltage reading, as it may be a bad measurement circuit. With the DC switch ON, check the grid standard. If the issue persists, replace the inverter.
B
bartonstacieSep 12, 2025
What causes an OV-G-F (Over Grid Frequency) error on a SOLIS Inverter?
- J
  justinromeroSep 12, 2025
  The OV-G-F error on your SOLIS Inverter indicates that the inverter detects the grid frequency as being too high. To troubleshoot, with the DC switch OFF, check the frequency at the inverter test points. If the frequency measures high, adjust the upper limit with permission from the utility. Also, check the LCD reading, as it may be a bad measurement circuit. With the DC switch ON, check the grid standard. If the issue persists, replace the inverter.
B
Brett ClaySep 3, 2025
What to do if SOLIS Inverter shows over DC bus voltage?
- M
  Misty BrewerSep 3, 2025
  If the SOLIS Inverter shows over DC bus voltage, check the inverter inductor connection and the driver connection.
S
Suzanne JenkinsSep 1, 2025
How to reduce DC voltage on SOLIS Solis-75K-5G-US?
- K
  kristarobinsonSep 1, 2025
  If the SOLIS Inverter shows over DC voltage, reduce the number of modules in series.

SOLIS Solis-75K-5G-US Specifications

General

Model	Solis-75K-5G-US
Rated Output Power	75 kW
Max. DC Input Power	112.5 kW
Max. Input Voltage	1100V
Input Voltage Range	200 V - 1000 V
Nominal AC Output Power	75 kW
Max. AC Apparent Power	82.5kVA
Nominal AC Voltage	480 V
Max. Output Current	90 A
Max Efficiency	98.7%
Frequency	60 Hz
Operating Temperature Range	-25°C to 60°C
Humidity Range	0% - 100%
Communication	RS485, Ethernet
Protection Level	IP66

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