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Fault Code Index

Solar Inverter Fault Codes — Find Your Error Code

Fault code guides for the main UK inverter brands: what the code means and what to do. Find your brand below.
  • 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. Free to diagnose, and £125 only if we fix it remotely.

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Super support. Delighted I found them. System battery was down for quite a while and no one would try to fix it as GivEnergy out of business. A few hours later and I’m up and running again. Brilliant service!!! Highly recommend them.

Ed Place · Sep 2026 Google

Ron was brilliant. He really tried to help. He spent hours trying to fix our GivEnergy AIO and ultimately it became apparent that it needed parts to fix the BMS management system. As there appears to be no replacement parts available on the market, he gave excellent advice on what options are now available to move forward. He is incredibly helpful and knowledgeable.

Mark Mayson · Jun 2026 Google

Ronald was able to organise a brilliant electrician with extensive experience of GivEnergy systems local to me in the SW. I have now got a fully functioning system and suspect that my electricity bill will be substantially reduced or in credit over a year. Also when said electrician discovered an overvoltage in the my local grid, Ronald prepared a very lucid and comprehensive report of the situation which I have now supplied to my local grid. Cannot recommend Ron and Dan enough.

Ian Macmillan · Jul 2026 Google

I can add to the list of customers who had already 'given up' on GivEnergy due to their appalling customer service, and that was before they went into administration. So you can imagine my desperation when, having changed my ISP and my Inverter, predictably, proving to be the only device that didn't connect automatically to my new network, I found zero prospect of any customer support with GivEnergy having called in the administrators just five days earlier! The salvation came from Solar Tech Support. My IT advisor stumbled across their web site and some very helpful tips for beleaguered GivEnergy customers, as well as an offer to provide direct assistance. Nothing ventured, I decided to drop them an E-Mail, with very low expectations based on my experience of GivEnergy customer support. Within an hour Ron had responded with some pin point advice, and after a few exchanges of E-Mails he had nailed the problem, enabling the combined efforts of my IT advisor and solar installer to resolve it and reconnect my Inverter. Thank you Solar Tech Support, and Ron in particular, for coming to the aid of a deserted and despondent GivEnergy customer. Expert, razor sharp advice and first class customer service, even though I wasn't officially a customer.

customer · Apr 2026 Trustpilot

STS were incredibly responsive and helpful In diagnosing an issue with my GivEnergy inverter. Although distance meant it was impractical for me to use them to fully solve the issue, I’m grateful for the help and detail they provided. Don is a real professional gent and a hero in my eyes.

Adam Miller · Jun 2026 Google

Superb work from Ronald. Cannot recommend highly enough. Figured out my problem late into night, going above and beyond! Many thanks to him

rohit s · Jul 2026 Google

Last updated

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

View fault codes →
Hybrid & String Inverter

Growatt

Complete Growatt error code index — Error 04, Error 61, Error 117, ARM-DSP and all fault categories

View all codes →
Hybrid Inverter & Battery

Sunsynk

Sunsynk inverter fault codes from the SolarMan portal and inverter display

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String Inverter & Optimisers

SolarEdge

SolarEdge inverter error codes (1001, 2x19, 3x11) and optimiser status alerts

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Hybrid & String Inverter

Solis

Solis S6/RHI fault codes from SolisCloud and inverter display

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Microinverter

Enphase

Enphase microinverter status codes from the Enlighten monitoring platform

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String Inverter

Fronius

Fronius string inverter fault codes and error messages from Solarweb portal

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Hybrid & String Inverter

Huawei

Huawei hybrid and string inverter fault codes from the FusionSolar portal

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Hybrid & String Inverter

SolaX

SolaX X1 and X3 series fault codes from SolaX Cloud and inverter display

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More fault code indexes
Hybrid Inverter & Battery

Fox ESS

Fox ESS inverter and battery alarms by name: BMS, grid, insulation and EPS faults

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Hybrid & String Inverter

Sofar

Sofar hybrid and string inverter fault codes — grid, isolation, and BMS errors

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Hybrid Inverter & Battery

Sigenergy

Sigenergy SigenStor inverter and battery fault codes — alarms and BMS errors

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All-in-One Storage

AlphaESS

AlphaESS SMILE all-in-one storage fault codes — inverter and battery alarms

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AC-Coupled Battery

Tesla Powerwall

Tesla Powerwall and Gateway fault codes — backup, grid, and connectivity errors

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Battery & BMS

Dyness

Dyness battery fault codes — BMS alarms, comms faults, and protection events

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Battery & BMS

Pylontech

Pylontech battery fault codes — BMS alarms, comms faults, and SOC errors

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Hybrid Inverter

LuxPowerTek

LuxPowerTek hybrid inverter fault codes — grid, battery, and EPS errors

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Inverter/Charger & MPPT

Victron

Victron VE.Bus, SmartSolar MPPT and VRM alarms for MultiPlus, Quattro and Cerbo GX

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FAQ

Fault code questions

Use the index for the brand on your inverter's own label or in your monitoring app. If your battery is a different brand, start with the brand whose screen or app shows the code. If you're not sure what you have, our find your inverter page shows where to look. If your brand isn't listed, send us the exact code and we'll identify it.
A code that points to insulation, earth or an arc, or one that keeps coming back after a restart, needs an engineer, so don't keep clearing it. Opening the inverter or battery, or touching cables, connectors or terminals, is an engineer's job. Send us the exact code and we'll tell you what to do next.
Our remote diagnostic is free, and the fix is £125 only if we fix it remotely. If it needs site work, that's from £295, quoted in writing before we start. Sending us a code to identify costs nothing.
Usually the same day. The remote diagnostic is one session (30 min). Send the exact code, your inverter brand and model, and what the display shows, and we'll tell you what to do about it.
Fault code help

Can’t find your fault code?

Not all fault codes are indexed yet. Share the exact code from your inverter display or monitoring portal and we’ll identify it — and tell you what to do about it.

  • All major inverter brands covered
  • Usually identified same day
  • Free to ask, £125 only if we fix it remotely

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