Frequently asked questions solar inverter & battery support

All 19 major brands sold in the UK: GivEnergy, Sunsynk, SolarEdge, Growatt, Solis, Enphase, Fronius, Fox ESS, Huawei, Tesla Powerwall, AlphaESS, Sigenergy, Duracell Energy, SolaX, Pylontech, Sofar Solar, Hanchu, Lux/LuxPowerTek, and Dyness. Each brand has its own monitoring platform, fault code system, and common failure patterns — we know them all. If you're unsure whether your system is covered, ask before booking.

Yes. We diagnose and fix battery storage issues including charging failures, overnight charge problems, discharge issues, temperature errors, BMS communication faults, and battery monitoring going offline. Battery diagnostics work the same way as inverter diagnostics — remote access to monitoring, analysis of fault codes and performance data, and a clear action plan.

That's fine — mixed-brand systems are common and we handle them routinely. We'll require access to both monitoring platforms and we'll analyse the communication between them. If the inverter isn't talking to the battery correctly (CAN bus, RS485 comms failure), we'll identify that. If only one unit is faulty, we'll tell you which one and why. Our cross-brand expertise lets us spot compatibility and integration issues that single-brand technicians often miss.

Yes. An independent diagnostic doesn't invalidate your warranty — we work alongside it. In fact, our diagnostic report is often what makes a warranty claim stick. If you need a manufacturer replacement, our independent written report provides the evidence they need. If the fault is repairable without going through the manufacturer, we'll tell you that too so you can choose the fastest route. We also offer a dedicated Warranty Claim Support service if you need us to handle the manufacturer escalation directly.

Yes. Fault codes are one of the first things we review. Every brand uses different codes — what GivEnergy calls an "F01" is completely different from Growatt's "Err6" or SolarEdge's "Grid Fault". We decode what the code means, why it appeared, and what triggered it. Some codes indicate immediate shutdown is required; others are warnings that are safe to reset. We tell you exactly which it is, whether a reset is safe to attempt, and what needs to happen next.

Often yes. Overnight charging failures are most commonly caused by settings issues — export limits, charge schedules, operating mode (Eco vs Timed Charge), or power limits. Firmware updates on GivEnergy, Growatt, and Sunsynk have historically reset charge schedules silently. We review your settings, generation history, and tariff, then correct them safely. If it turns out to be a hardware fault (BMS issue, degraded cells), we'll diagnose that remotely and recommend on-site work if needed.

It means the inverter is generating, but can't communicate with its monitoring server. Common causes: WiFi password changed after a router replacement, the inverter's WiFi dongle lost its connection and didn't reconnect, or the monitoring account was deleted or expired. Most of these are remotely fixable — we can reset the WiFi configuration or recover the account. Some require physical access to restart the WiFi module. We diagnose which situation you're in, then advise clearly on next steps.

Very common, especially with GivEnergy, Growatt, and Sunsynk systems. Inverters and batteries have internal clocks used for charge scheduling. Some don't auto-update when clocks change, so the schedule shifts by an hour — the battery charges at 2am instead of 1am, missing the cheap-rate window. Easily fixed remotely by updating the system clock or adjusting the schedule offset. We do this regularly in March and October.

Simple and secure. Log into your inverter monitoring app (GivEnergy portal, Growatt ShinePhone, SolarEdge monitoring, etc.). Go to Settings → Users or Share, then create a temporary read-only user account and send us the credentials, or use a share link. You control exactly what we see. We never have write access to change settings unless you explicitly grant it, and you can delete the shared account at any time after the diagnostic.

We can still diagnose. For older systems without monitoring or where access has been lost, we work from physical readings on the inverter display, fault codes, and visual inspection — which usually means an on-site visit. If you want monitoring restored, our Monitoring Account Transfer service (£75) handles the manufacturer escalation and account recovery for all 19 major brands.

Yes. This is exactly what our Monitoring Account Transfer service (£75) covers. If the installer registered the account under their company name, or you've bought a house with an existing solar system, we contact the manufacturer directly, authenticate you as the property owner, and transfer the monitoring account to your name. Includes all documentation handling. Typically 3–7 working days; longer for complex installer-registered cases.

Visit solar-tech-support.co.uk/book/. Select the service you need (Remote Diagnostic, Health Check, On-site Inspection, etc.), choose your preferred date and time, and complete the booking form. You'll receive a confirmation email within 2 hours with appointment details, what to prepare, and how to share monitoring access before the session.

We'll tell you clearly at the end of the remote diagnostic: what the fault is, why it needs on-site work, and a transparent quote for an on-site repair visit. You then decide whether to proceed. You're never obligated to book further work — but you'll have a precise diagnosis and all the information needed to make an informed decision, whether that's hiring us to fix it or getting quotes elsewhere.

No — the remote diagnostic is free. If we can fix your fault remotely it's a flat £75, and you only pay if we fix it; any on-site repair is quoted up front from £245. You're not paying for the same work twice — the diagnostic is the foundation of the repair scope, so it's counted toward the total. See our pricing page for full details.

Yes. The Solar Health Plan is a standing check on your system — regular review of generation performance, battery health, settings verification, and firmware tracking. It's designed to catch problems before they cost real money, rather than waiting until something fails. If you'd prefer ad-hoc support, we also offer pay-as-you-go diagnostics and repairs.