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-V Error: Meaning, Causes & Safe Fix

Your Solis inverter measured grid voltage above its safe limit and stopped feeding power to protect itself. This is usually a grid or wiring issue, not a broken inverter.

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-V stands for 'over grid voltage.' The inverter constantly monitors the AC voltage from the utility grid. When it rises above the protection threshold (variants 01–04 cover different voltage levels and time windows), the inverter disconnects from the grid and shows this alarm. It reconnects automatically once voltage returns to the normal range.

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

AC cable too thin or too long, causing voltage to rise between the inverter and the grid connection point
Genuinely high grid voltage from your utility, especially in areas with lots of solar exports
Protection voltage limits set tighter than your local grid code requires

Safe steps to try

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

Write down the exact code (V01, V02, V03 or V04) and the time it appeared
Check whether neighbors are affected or your utility has reported high voltage in the area
Restart the inverter: switch the AC grid switch OFF, then the DC isolator OFF, wait 5 minutes, then switch the DC isolator ON followed by the AC grid switch ON
If the code clears, monitor the display for the rest of the day to see if it returns
If it keeps returning, contact your installer — do not adjust protection limits yourself

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 or electrician if the fault repeats, if you suspect the AC cable is undersized, or if protection limits need adjusting — limit changes must be done by a professional and only if allowed by your electrical company.

Frequently asked questions

Will OV-G-V damage my inverter?

No — the protection exists precisely to prevent damage. The inverter disconnects before any harm occurs and reconnects automatically once voltage returns to the normal range.

Can I fix it by restarting?

A restart clears transient events, but if high grid voltage persists the code will return. Repeated faults need your installer to check cable sizing and protection settings.

Is it safe to keep the system running with this fault?

The inverter protects itself by disconnecting, so there is no immediate danger. But repeated overvoltage events mean lost production — get it checked.

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