Big thanks to Ron. He was incredibly patient and helpful over the phone, taking the time to walk myself and the installer through every troubleshooting step. Through lots of testing he figured out the issue was definitely a hardware issue, which allows us to consider our next steps. Support fees are clear and they operate a “no fix no fee” policy. It is rare to find that kind of honesty combined with dedicated phone support nowadays. I highly recommend Ron, if you need help with your solar system don’t hesitate to give him a call.
Growatt Inverter Support — Error 04, Error 117 & ShinePhone Faults
- Not affiliated with Growatt Technology
- All MIC, MIN, MOD and SPH models supported
- Error code to root-cause diagnosis
Error 04, Error 117, ShinePhone offline — we diagnose Growatt systems remotely in a single session.
Book your free remote diagnosticSafety: If you have Error 04 (insulation fault), do not attempt to reset the system without identifying the cause — isolate at the DC switch.
Ron diagnosed the problem remotely - efficiently and order the part identified as the fault - this part came directly from to me and Ron visited within a few days and within the hour corrected the problem and since everything has been excellent -highly recommended - very pleasant manner and lovely to work with . Ivor Morris.
Amazing support, went out of his way to help try and get us back up and running
Contacted Solar Tech about my Givenergy battery storage system that wasn't working. Battery status was "idle". Given the company Givenergy had gone bust, I need independent quality technical help. Very patient and clearly very knowledgeable about battery systems Ron diagnosed possible issues and suggested several possible remedies. Worked our way through them and fortunately it began to work. The fault was very specific and only an experienced engineer would have thought to check. Suffice to say I'll be back if I need independent support again. Lastly you only pay if there is a solution. Outstanding.
My Givenergy battery stopped working nearly a month ago. After unsuccessfully reaching out to my installer, who looks like he's also busted, I found Solar Tech Support on a Google search. They fixed my issue in a couple of hours. Any frustrated Givenergy customers, I highly recommend these guys.
What an Amazing service and so helpful . I have had problems with a faulty GivEnergy inverter and Ron has been so diligent in investigating and reporting on it . I’d give him more than 5 stars if I could for his help in diagnosis and potential solution. Thoroughly recommend .
Common Growatt problems we diagnose
Every fault below has a proven diagnostic path. Click through for the specific page or book a diagnostic if you're unsure.
The inverter has detected that DC isolation has dropped below 1MΩ. This is a genuine safety event — not a nuisance trip. Common causes: cracked panel backsheet, damaged DC cable, water in a junction box or connector. Requires on-site investigation.
See Error 04 guide →AC voltage at the grid connection has exceeded the G98/G99 upper limit. Common in solar-dense streets. Temporary self-clearing, or requires export limit configuration, DNO notification, or voltage regulation settings.
See Error 117 guide →DC insulation resistance has dropped below 1 megaohm. The inverter shuts down as a safety measure. Causes include MC4 water ingress, UV-damaged cables, cracked junction boxes, and rodent damage. Requires IR testing to locate the fault.
See isolation fault guide →Inverter powered but generating nothing. Could be a DC string fault, isolator not closed, or protection trip not yet cleared. Check the ShinePhone app for error codes and the ShineTools log.
See diagnostic guide →App shows no data or inverter appears disconnected. Could be the WiFi logger (ShineWiFi or ShineLink) offline, a cloud-side ShineServer outage, or the logger hardware failed. The inverter may still be generating.
See diagnostic guide →The ShineWiFi stick or ShineLink module requires 2.4GHz WiFi. After a router change, it needs reconfiguring via the ShineTools app or web interface. We guide you through the reconnection process.
See diagnostic guide →ShinePhone shows power output below expectations. Could be a string performing at reduced capacity, soiled panels, or a configuration error. We review ShineServer historical data to identify the fault pattern.
See diagnostic guide →New homeowner needing to register the system, or taking over a system registered to an installer's account? Covers first-time setup, orphaned account transfers, and what to send to Growatt UK to reclaim access.
See setup guide →Growatt fault code index
Growatt error codes appear on the inverter LED display and in the ShinePhone app. Common codes: Error 04 (insulation failure), Error 117 (grid over-voltage), Error 107 (grid frequency out of range), Error 025 (DC bus voltage high). Share your exact code when you book — we identify the root cause as part of the remote diagnostic.
What we do for Growatt owners
Remote Growatt Diagnostic
We review ShineServer data, inverter settings, and fault history to identify the exact fault remotely.
Growatt System Recovery
Installer gone bust, ShineServer access lost, or monitoring never set up correctly? We recover access and rebuild documentation.
On-Site Growatt Repair
Isolation fault investigation, DC cable fault location, CT clamp correction, component replacement.
Growatt datasheets, manuals & warranty PDFs
Download datasheets, installation manuals and warranty documents for Growatt MIN, MID, MOD and SPH hybrid inverters. Self-hosted and always current.
About Growatt systems — what you need to know
Growatt is one of the UK's most widely installed inverter brands — particularly popular with budget-conscious installers. The MIC, MIN, and MOD series cover residential string inverter installations. The SPH and SPA series are hybrid inverters with battery integration capability. All Growatt inverters display fault codes numerically on the front LED panel and report them to the ShineServer cloud via the ShineWiFi or ShineLink logger. Growatt's ShinePhone app provides remote monitoring and fault history access.
The most common Growatt searches we handle are: Growatt Error 04, Growatt Error 117, Growatt ShinePhone offline, Growatt not producing, and Growatt isolation fault. Error 04 is particularly common in older installations where panel connectors or cable insulation have degraded — it is a genuine safety event, not a nuisance fault. STS provides independent Growatt support across the UK — not affiliated with Growatt Technology Co. Ltd.
STS supports all major inverter and battery brands — not just Growatt. If you have a mixed-brand system or are comparing options, visit the brand hub.
Browse all 19 brandsGrowatt questions answered
Ready to fix your Growatt system?
Tell us what's happening. We'll review your details and come back with a clear diagnosis path — usually same day.
- Not affiliated with Growatt Technology Co. Ltd
- No fix, no fee
- On-site visits available across Yorkshire
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Got a solar fault or need a quick answer? Drop us a message — we usually reply within a few minutes. Mon–Fri, 9am–7pm.