SolarEdge Grid Fault — What It Means & How to Fix

What Does This Error Mean?

A SolarEdge grid fault means the inverter detected the grid voltage or frequency was outside the acceptable range and disconnected as required by safety regulations. Most grid faults are caused by a momentary grid disturbance and clear automatically within 5 minutes.

Affected Models

SolarEdge SE2200H
SolarEdge SE3000H
SolarEdge SE5000H
SolarEdge SE7000H
SolarEdge SE10000H
SolarEdge StorEdge
SolarEdge Three-Phase Inverters

Common Causes

Grid voltage spike or sag — utility supply went outside the permitted range
Grid frequency instability in your area
AC wiring issue causing voltage imbalance at the inverter terminals
Nearby large load switching on or off causing a momentary voltage dip
Weak or unstable grid connection in rural areas

How to Fix It

Wait 5 minutes and monitor the inverter.

After a grid disturbance, SolarEdge inverters wait for the grid to stabilise before reconnecting. Most grid faults clear automatically and production resumes within a few minutes without any action needed.
Check the mySolarEdge app for the specific fault code.

Open the mySolarEdge app and tap on the inverter. The fault section will show the specific grid fault type — overvoltage, undervoltage, over-frequency, or under-frequency. Each tells you whether it is a grid issue or a wiring issue.
Check whether neighbours have power.

If your neighbours also have solar and theirs has also stopped, or if there was a brief power flicker, this confirms a utility grid event — not a fault with your equipment.
Check the AC disconnect switch.

Locate the AC isolator switch between the inverter and the switchboard. Confirm it is fully in the ON position. A partially engaged switch can cause intermittent grid fault readings.
Contact your installer if faults recur daily.

Recurring grid faults in the same part of the day often point to a neighbourhood voltage rise problem — common in areas with high solar uptake. Your installer can check the grid voltage at the inverter and potentially adjust the inverter's export limits.

When to Call a Professional

If the grid fault error returns repeatedly every day without clearing, the AC wiring from the inverter to the switchboard should be inspected by a licensed electrician or solar installer.

Frequently Asked Questions

SolarEdge shows grid fault every afternoon — is something wrong?

Afternoon grid faults are very common in solar-heavy suburbs. When many households export power at noon, the local grid voltage rises. If it exceeds the inverter's upper limit, the inverter trips. This is a grid infrastructure issue — contact your solar installer and electricity network to report it.

Will a grid fault damage my SolarEdge inverter?

No — the grid fault protection is a safety feature. The inverter disconnects to protect itself and complies with electrical safety standards. Frequent disconnections are annoying but do not damage the inverter.