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Brand support · Growatt

Growatt Inverter Support — Error 04, Error 117 & ShinePhone Faults

Error 04, Error 117, ShinePhone offline, isolation faults — we diagnose Growatt inverters at the engineering level. Remote-first using ShineServer data and fault code logs. Independent from Growatt and your original installer.
Free remote diagnostic pay only if we fix it — from £95 if remediable remotely
  • Not affiliated with Growatt Technology
  • All MIC, MIN, MOD and SPH models supported
  • Error code to root-cause diagnosis
Seeing a Growatt error code?

Error 04, Error 117, ShinePhone offline — we diagnose Growatt systems remotely in a single session.

Book your free remote diagnostic

Safety: If you have Error 04 (insulation fault), do not attempt to reset the system without identifying the cause — isolate at the DC switch.

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.

Steve M · Jun 2026 Google

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.

Ivor Morris · Jul 2026 Google

Amazing support, went out of his way to help try and get us back up and running

Paul Smith · May 2026

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.

Mr P · Jun 2026

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.

Sarma Amirapu · May 2026

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 .

Penny Ribbeck · Jul 2026 Google
Growatt Faults

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.

Fault Codes

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.

Fault code categories
·Isolation / DC faults — E0x series
·Grid faults — E1xx series
·AC & inverter faults
·Communication errors
Services

What we do for Growatt owners

Remote Growatt Diagnostic

We review ShineServer data, inverter settings, and fault history to identify the exact fault remotely.

Error code root-cause analysis
ShineServer data review
Settings validation
Book remote diagnostic

Growatt System Recovery

Installer gone bust, ShineServer access lost, or monitoring never set up correctly? We recover access and rebuild documentation.

ShineServer access recovery
Monitoring reconfiguration
Warranty evidence pack
Start recovery

On-Site Growatt Repair

Isolation fault investigation, DC cable fault location, CT clamp correction, component replacement.

Evidence-led targeted checks
Safety-focused report
Repair or replacement path
Discuss visit
Documents

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.

Product datasheets & specifications
Installation & commissioning manuals
Warranty terms & coverage documents
App & software setup guides
Wiring diagrams

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.

We also support

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 brands
FAQ

Growatt questions answered

Error 04 on a Growatt inverter is an insulation resistance failure. The inverter has detected that the DC isolation between the solar panels and ground has dropped below the safe threshold (1MΩ). It is a safety protection — the inverter will not run until the fault is cleared. Causes include a faulty panel, damaged DC cable, or water ingress into a connector or junction box. Book a diagnostic — we'll identify the source of the fault remotely in most cases.
Error 117 is a grid over-voltage protection trip. The AC voltage at the inverter terminals has exceeded the G98/G99 limit (typically 253V in the UK). This is common in areas with dense solar installations where solar export raises the local grid voltage. The inverter disconnects to protect the grid. We can configure export limiting to prevent repeat trips, or notify the DNO if grid reinforcement is needed.
Causes include: the WiFi logger (ShineWiFi or ShineLink) losing its connection, the router password changed, ShineServer cloud-side outage, or the logger hardware has failed. The inverter may still be generating even when the app shows offline — see the ShinePhone offline fault card above for diagnostic steps.
No. Error 04 means the system has detected a reduction in electrical isolation between the PV panels and earth. Running through this fault risks electric shock. The inverter shuts down as a safety measure. Do not override it — identify and fix the cause first. Isolate the system and book an inspection — we assess remotely where possible.
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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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Call 07944 877 329 Book free diagnostic