Fault Code Index

Solar Inverter Fault Codes — Find Your Error Code

Every fault code index for every major UK inverter brand — what the code means, whether it's safe, and what to do. Find your brand below.

Book fault diagnosis Problems hub

Covers hybrid and string inverters
Battery and BMS error codes
Updated with latest firmware versions

Got a fault code you can't resolve?

If your inverter is showing a fault code and you're not sure what to do, a remote diagnostic will identify the cause and recommend the fix — usually within 30 minutes.

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5.0

Rated 5.0 on Google Read all 73 reviews

My Givenergy system went offline, so I lost control of it. Ron from STS and Craig from Norfolk Solar were most helpful in diagnosing the problem by phone. Full marks for their patience and ability.

Tony Jackson · Jul 2026 Google

I work for a Solar Company and had a customer with a GivEnergy system that we are not versed in. Ron took the time to explain the issues my customer was having and between us managed to rectify the issues. 10 Stars ... Thanks again STS

Craig Daly · Jun 2026 Google

Diligent and reliable service.

Samuel Jakovljevic · Jul 2026 Google

Very pleased with solar tech support , they were very informative and helpful , arrived when they said they would and did a great job , I would highly recommend them .

mary shaw · Jul 2026 Google

Having had a recent solar instal and being concerned about various aspects of the work, I reached out to Solar Tech for advice. I received immediate engagement and first class advice. This was late evening and the company went above and beyond in providing assistance to me - high recommended.

John Szram · Jul 2026 Google

Excellent response to diagnose a problem on our SolarEdge installation. Kept us informed at every step. Diagnosis quickly completed and solution implemented.

Les Bennett · May 2026

How to use this index. Find the exact error code on your inverter LCD or monitoring app, then select your brand below. Note whether the code is a warning (system still running) or error (system stopped) — this affects diagnosis. If you're unsure, copy the error code and book a diagnostic.

Available fault code indexes

Hybrid Inverter & Battery

GivEnergy

Error codes for GivEnergy hybrid inverters and AIO — portal fault codes, BMS errors, firmware flags

Solar Inverter Fault Codes — Find Your Error Code

GivEnergy

Growatt

Sunsynk

SolarEdge

Solis

Enphase

Fronius

Huawei

SolaX

Fox ESS

Sofar

Sigenergy

AlphaESS

Tesla Powerwall

Dyness

Pylontech

LuxPowerTek

Can’t find your fault code?