If a fault on this page looks like yours — or you are stuck on a different one and want it written up — start a remote diagnostic. Free to diagnose if it can't be fixed, fixed cost if it can.
Book your remote diagnosticHow diagnostics workOur SolarEdge PV system with LG batteries had its first hiccup after 8 years of hard work. The Inverter failed. Fortunately I found Solar-Tech-Support who diagnosed the problem very quickly, ordered a replacement unit and fitted it shortly after we received the unit from SolarEdge. Very thorough and professional approach. Thank you, a solid 5 star recommendation.
Fantastic service, I would highly recommend. From first contact my solar issue was resolved within 2 days. Wouldn't use anyone else.
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.
My solar panels stopped producing unexpectedly, contacted Ron who assisted me initially remotely and then visited to correctly diagnose that the problem was on the roof. Within a month the solar panels are now up and working, kept me up to date with when scaffolding arriving and the lads who checked the solar panels, a very professional team, organisation and service
We have a GivEnergy system, both GivEnergy and our installer have gone bust! Ron was able to remotely log in to our system and sort the issue within about 30mins. Would definitely recommend and will be using in future
Great service. Got our Givenergy battery back online remotely when others said it needed an onsite visit. Ron resolved the issue within about an hour of my email. Brilliant service.
Real faults from real STS customers. What the inverter said, what it actually was, and how it was diagnosed — usually without a site visit. Newest first.
We passed a hundred five-star reviews, so we read back through all 151 and counted what people actually mention. 62% name GivEnergy, 34% had already been left stuck by somebody else, and 28% were fixed without anyone visiting.
A Solis and Pylontech system where the battery had stopped dead, while the BMS carried on reporting a 78% pack and an 80A discharge limit. The DC breaker had tripped, but the enclosure lid held the toggle up so it read as on.
A decade-old premium SolarEdge + LG Chem system threw a production fault on one inverter. We arranged the warranty replacement, swapped the faulty unit, and reconfigured the newer inverter to talk to the existing kit — back up and running in a few hours.
A four-year-old commercial solar + battery system that had never delivered: one inverter in error, three more idle on miswired comms, a dead battery stack, monitoring never handed over — and the panels fitted on the north roof, costing ~13,000 kWh (~15%) a year.
Four years, ~£35,000, three-phase with six AC3 inverters, an EMS per phase, EPS backup on every inverter and LoRa grid comms — one of the largest residential GivEnergy systems in the country, and it had never once worked. Here’s the late night it finally came good.
A customer messaged us on WhatsApp: his 90-year-old father-in-law had been resetting the battery breaker daily, and the installer had walked away citing GivEnergy's administration. We found the MCB cooking itself on a badly-made termination — a fire risk, not a battery fault.
Kerry's FoxESS inverter kept shutting down on over-voltage. He was sure the mains was too high — but feared he could never prove it to the network operator. The evidence was sitting in the inverter all along.
Mike added two battery packs and asked a fair question: are they doing anything? You can't tell from the app. So we ran one full discharge and integrated the power curve — here's the maths, and the answer.
Patrick's 12-month-old Sunsynk 8kW had three uneven strings paired badly across two parallel MPPTs. The output graph cliffed every sunny morning at 09:00. Bad engineering, named.
A misleading fault code, a new battery pack, and an installer who picked up the phone three years after the install. The kind of fix the front panel was never going to give you.
Most solar faults are misdiagnosed because the front-panel code is a generalised fallback, not the real root cause. Writing the real diagnosis up — code, cause, fix, time-on-the-clock — is the closest thing this industry has to peer-reviewed proof. It also keeps us honest.
Principle-first explainers behind the case studies — how inverters, CT clamps, batteries and tariffs actually work.
All guides →Every review is from a real customer. Several of the case studies here started life as a one-line review.
All reviews →Your fault is probably one of these in disguise. Free to diagnose if we can't fix it, fixed cost if we can.
How it works →Most STS faults look unique to the owner and identical to ten other systems on the bench. Start a remote diagnostic — most root causes identified inside thirty minutes.
Due to unprecedented demand we’re currently only carrying out on-site work in Yorkshire, and replies are taking up to 7 days. Remote diagnostics continue for the whole UK as normal.
Every message is read and answered, so please don’t send it twice; that only slows the queue.
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