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.

Growatt AC V Outrange: Meaning, Causes & Safe Fix

AC V Outrange means your grid (utility) voltage is outside the range your inverter is allowed to feed into — or the inverter's voltage limits are set incorrectly. The inverter waits until the grid is normal.

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

Grid-tied inverters may only feed power when the utility voltage is within strict legal limits. 'AC V Outrange' means the measured grid voltage is too high or too low, so the inverter disconnects and waits. This is usually a grid problem, not an inverter problem.

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 voltage too high or too low (most common)
High grid impedance — voltage rises when feeding in, common with several inverters on one street
The inverter's voltage limits set incorrectly for your country/grid code
Loose AC wiring connections

Safe steps to try

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

Check whether your home's lights are dimming or unusually bright, and ask neighbors if they have issues — that points to a grid problem.
Note the voltage shown on the inverter display, if available.
Turn off the AC breaker and DC switch, visually check that AC cables look undamaged from the outside (do not open anything), then restart.
If the grid is the cause, the inverter reconnects automatically once voltage returns to normal — give it time.
If it happens daily at sunny midday, note the pattern for your installer (likely grid impedance).

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 AC V Outrange appears frequently or persists while your home's power seems normal — the inverter's country/grid-code voltage limits may need checking, which is an installer task. If the whole street is affected, contact your electricity utility.

Frequently asked questions

Will it fix itself?

Often, yes — if the cause is a temporary grid fluctuation, the inverter reconnects automatically once the voltage is back in range.

Why does it happen at midday?

When many solar systems feed into the grid at once, local voltage can rise above the limit — especially in areas with high grid impedance. Your installer or utility can investigate.

Is my inverter broken?

Probably not. This fault is the inverter correctly refusing to feed into an out-of-spec grid — it is doing its job.

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 — Troubleshooting for Growatt TL&MTL (Ver1.2) 2013-7-15, Growatt New Energy ('The grid voltage is out of range, or the inverter's voltage limits is incorrect'); corroborated by GROWATT MIN 7000TL-X User Manual (Error 300: 'Utility grid voltage is out of permissible range')