Warning What does this mean?

Your system is down or running degraded, but this is not an immediate safety danger. Work through the safe steps below.

Solis Inverter OV-G-F Error: Meaning, Causes & Safe Fix

The grid frequency rose above your Solis inverter's limit, so it disconnected. In almost all cases this is a utility grid issue, not an inverter fault.

What should I do first?

Two quick questions — we'll point you to the right starting point.

Is this code still showing on your inverter's display?

What this code means

OV-G-F means 'over grid frequency' (variants 01/02). The inverter monitors AC frequency (50/60 Hz nominal); if it exceeds the upper protection limit, the inverter disconnects for safety and grid-code compliance.

What is this downtime costing you?

Rough estimate while your system isn't producing. Adjust the numbers to match your setup.

System size (kW) Peak sun hours / day Electricity rate ($/kWh)

–per day

–per week

–per 30 days

≈ – kWh of lost production per day.

Estimate only — assumes ~80% real-world output vs. nameplate. Actual losses depend on weather, shading, panel direction, and your tariff.

Common causes

Utility grid frequency excursion
Backup generator running with frequency out of spec
Unstable local grid conditions

Safe steps to try

Work top to bottom, ticking off each step as you complete it. 0 of 5 done.

Note the code and the time; check whether the utility reports grid issues
Perform one documented restart (AC OFF, DC OFF, 5-minute wait, DC ON, AC ON)
If you are on generator backup, note this for the generator technician
If it clears and stays clear, it was a transient grid event
If it recurs on normal grid power, contact your installer

Is your inverter still under warranty?

Before paying for a repair, check — your installer may fix this free.

Brand Year installed

Based on typical standard warranty terms — always confirm with your warranty card or installer paperwork, as terms vary by model, region, and purchase date.

When to call an electrician

Call your installer if it recurs on normal grid power. If you run on a backup generator, have the generator serviced — its frequency must stay within the inverter's specified range.

Frequently asked questions

Does high frequency damage the inverter?

No — frequency protection is about grid compliance and safe operation. The inverter disconnects to stay within its certified operating range.

Do I need to do anything?

The inverter will reconnect on its own once frequency returns to the normal range. No action needed from you unless it keeps happening.

I only see this when my generator runs — why?

Backup generators often produce less stable frequency than the utility grid. If OV-G-F appears only on generator power, the generator needs servicing by a qualified technician.

Need a professional?

This fault may need professional diagnosis. Contact a qualified solar electrician in your area.

Sources: meaning and troubleshooting verified against the manufacturer's documentation — Solis S5-GR3P(3-13)K Three Phase Inverter User Manual (Ginlong Solis), Table 9.1