Why has my solar system stopped working?
Your generation is zero. The inverter is showing a fault, or nothing at all. Before calling anyone out, there are five things worth checking yourself — and one thing to check on your monitoring app that most people miss entirely.
The most common culprits are: grid supply interruption, DC isolator failure, inverter thermal shutdown, and communication loss between the inverter and monitoring platform. None of these requires a roof visit to diagnose — and knowing which one you have saves you time and money.
The most common solar inverter faults — and what they actually mean
Error codes look alarming. Most aren't. This guide covers the fault codes that appear most often in the systems we diagnose — what they indicate, and what needs to happen next.
Get your inverter diagnosed →Inverter repair vs replacement — how to make the right call
A failed inverter doesn't always mean a new one. Some faults are repairable at a fraction of replacement cost. Here's how to tell the difference — and what questions to ask your engineer before agreeing to anything.
Get an honest assessment →Got a fault right now?
Don't just read about it — get it diagnosed
Describe what you're seeing. We'll identify the fault type and match you to the right specialist. Takes under 2 minutes.
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Fault-finding checklists & reference guides
DC fault checklist, inverter error code guide, battery health checklist and more — all free.