Solar Tech Support
Engineer-led solar diagnosticsDiagnosed by experts. Powered by data.
Solar Tech Support is the UK's most active independent solar diagnostics service — built and run by an electronic engineer, with a fault database that grows weekly across every major brand.
We don't just check solar — we diagnose it.
I work for a Solar Company and had a customer with a GivEnergy system that we are not versed in. Ron took the time to explain the issues my customer was having and between us managed to rectify the issues. 10 Stars ... Thanks again STS
Ron is a super star. Two months ago my GivEnergy battery failed a firmware upgrade leaving it a brick. My installer couldn't/wouldn't fix it. GivEnergy couldn't/wouldn't fix it. Then they went into administration and all hope was lost. A flurry of emails later and Ron had diagnosed the fault (failed USB flash drive, something I'd suspected) and talked me through resolving it. Two months of nothing resolved in about 3 hours. It's great to work with someone who pays attention to the details, knows that they're doing (not just following a script) and gets stuff sorted without a fuss or up-charging.
My old solax packed in and was replaced by solar tech support. I am impressed at the very short time scale, sorted in only 3 days. Some were quoting 2-3 weeks. The old unit and all the packing was taken away.
Absolutely wonderful support. I have a GivEnergy system that was installed in 2022, and a firmware update was flagged in the app, so I proceeded to update the software .... and immediately regretted it, as my inverter came up with an error, and was not working at all! With no GivEnergy support available, and my installer saying there was nothing he could do, I googled help, and found Ron. What a stroke of good luck! Submitted an on line enquiry late morning, and received phone call just after 5 pm, and later that evening Ron was able to supply me with old firmware no longer available on the GivEnergy web site. I was then able to update the firmware using a GivEnergy youtube video as reference, and hey presto the system was back up and running. One further slight adjustment by Ron and we are back normal. What a relief. I have no hesitation in recommending Solar Tech Support if you have a problem. Great service! And if you are a GivEnergy system owner, whatever you do, DO NOT UPDATE FIRMWARE!
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.
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 .
A superb service from Ron who went beyond the normal service received from other Tech support companies. I live abroad and was badly let down when my givenergy system failed (and the company went bankrupt) and the local supplier ran away from the problem. Ron sorted the problem and even accessed specialist coding for the inverter that would not be available for suppliers. Ron also ran a full diagnostic to insure that all was in good working order afterwards. Without Rons support and patient assistance I doubt I would ever have got the system back up and running. Well done and thankyou and you have a customer for the future.
Called back within a day and gave good advice.
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.
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.
This company are a rare gem, I had a very unusual problem following a failed firmware upgrade on my GivEnergy kit. I then found out GivEnergy were in administration and had dismissed all their support staff! None of the usual fixes to try and restore my inverter comms would work, and I looked everywhere, forums, GivEnergy youtube support videos - even AI couldn't figure it out. My installer was talking about huge sums for system replacements, and being vague / evasive about if they'd even install replacement GivEnergy inverter. Enter Solar Tech Support, reassuring and knowledgeable from the very start, I've learnt loads about my solar system though the friendly chat while my engineer worked as he diagnosed the problem and figured out a fix procedure that I've not found anywhere else - amazing. If you need solar system repairs - especially if you like me have been left high and dry by GivEnergy, I cannot recommend this company enough. Give them a call.
Brilliant support to get my solar battery working again. I didn’t expect help on a Saturday but Ron answered the phone, listened and sent me the information I needed to get it going, answered questions etc. A brilliant service I’d happily recommend.
STS was founded by an electronic engineer from the University of York who spent three years as Technical Director at one of the UK's largest renewable energy companies — overseeing around 1,000 solar installations a year at peak. That means every major inverter brand, every battery system, every failure mode — diagnosed from the inside.
Most people who call a solar problem number reach a call centre that logs a ticket and dispatches an electrician. STS is different: you get engineer-level diagnosis from someone who has seen your exact fault hundreds of times.
We diagnose the real issue first, then do the minimum required work to restore safe generation. Remote-first, on-site only when needed.
Fault codes, underperformance, battery issues, monitoring outages. We review your evidence and identify the real cause.
Installer gone bust, access locked, ownership transfer, monitoring rebuild. We restore control of your system.
Hardware faults, CT rewires, EPS circuit checks, independent inspections. Targeted visits, no guesswork.
Full system performance audit. Catch underperformance before it costs you — ideal after purchase or installer change.
Book health checkMCS compliance checks, post-install snag inspections, warranty claim support. Unbiased, documented, defensible.
Book inspectionA yearly once-over: generation checked against expectation, battery health, settings and firmware. No subscription.
See annual maintenanceEvery fault below has a repeatable diagnostic path. Click your symptom to go straight to the right page.
Hard stops, no output, complete shutdown, fault state.
Charge windows, CT errors, BMS faults, firmware issues.
App not updating, portal dark, logger disconnected.
Inverter tripping high voltage, evidence packs, DNO.
Inverted readings, backwards battery behaviour, wrong data.
Wrong cap, meter conflicts, DNO compliance failures.
Access locked, no warranty support, orphaned system.
Generation lower than expected — shading, config, hardware.
Look up your inverter error code by brand — SolarEdge, Huawei, GivEnergy, Growatt and more.
Add battery storage, install EPS backup power, expand an existing battery stack, replace a failing inverter, or protect your panels from birds. Every upgrade is scoped, priced and handled by STS.
No battery yet? Add a GivEnergy or Sunsynk hybrid inverter and battery to your existing solar array.
See battery upgrade guide →Already have a hybrid inverter? Add a second or third battery to store more solar and import cheaper overnight energy.
See storage expansion guide →Power critical circuits during a grid outage. GivEnergy and Sunsynk EPS installation — from configuration to dedicated backup circuit.
See EPS installation guide →Aging, faulty or end-of-life inverter? Replace like-for-like or upgrade to a hybrid model. All brands, UK-wide.
See inverter replacement guide →Don't know what you have, who installed it, or if it's even working correctly? We identify the system, transfer your monitoring access, and get you fully in control.
Start here →No response, company dissolved, or left with a locked system? We recover monitoring access, rebuild documentation, and support warranty claims — without depending on the original installer.
Get recovery support →Independent operations and maintenance for commercial solar — no manufacturer ties, no installer partnerships. Annual O&M contracts, emergency fault response, system takeover, and one-off performance audits. All brands, UK-wide.
Annual inspection, real-time monitoring, priority engineer response, and performance reporting.
Same-day remote triage, next-business-day on-site. Inverter failure, generation loss, safety alarms.
Transition from a previous provider. Baseline audit, documentation recovery, structured handover.
One-off performance assessment. Due diligence, insurance, disputes, pre-warranty expiry. No contract required.
Each brand page covers brand-specific fault codes, configuration guides, common problems and repair services.
Remote diagnostics available nationwide from day one. On-site visits cover Yorkshire and surrounding regions. We're expanding — check your area.
No call-out surprises. Remote-first means lower cost. We tell you what's needed before you commit to a visit.
Evidence review + structured diagnosis + written action plan.
Full system performance audit. Catch issues before they become faults — ideal after purchase or installer change.
Targeted physical checks. CT rewires, isolation faults, EPS, hardware.
Remote-first: if the fastest, safest route is remote, we take it. On-site only confirmed necessary before booking.
Practical guides written by engineers — not marketing copy.
What to check before, during and after installation — fully referenced to MIS 3002:2025, MIS 3012:2025 and BS 7671:2018+A3:2024. Don't make final payment without it.
Read the guide + download PDF →DNO notification vs approval, export limits, Fast Track G99, and what happens when paperwork is missing.
What they do, how direction affects readings, and how to spot a miswire.
BMS, SoC, charge rates, and why your battery behaves the way it does.
SEG registration, eligible suppliers, MCS requirements, and how to get paid for your export.
EPS circuits, island mode, switchover time, and what actually runs during a power cut.
Yes — most faults are diagnosed and resolved remotely. We start with monitoring data, settings review and evidence-led troubleshooting. If an on-site visit is required, we confirm exactly what needs checking so there's no wasted callout.
We specialise in this. We handle monitoring access transfer, rebuild missing documentation, support MCS certificate queries, and compile warranty evidence packs — so you're no longer dependent on an installer that no longer exists. See installer gone bust support →
Common causes include incorrect charge window settings, CT clamp direction errors, BMS communication faults, firmware mismatches, or export limit conflicts. We diagnose the exact cause and apply the correct fix. See battery not charging support →
No. We never ask homeowners to open covers or perform live electrical work. We focus on evidence, monitoring data, safe external checks, and clear guidance. If physical work is needed, a qualified engineer visits on-site.
This is more common than you'd think. We identify the system, assess performance against design spec, check MCS documentation, and get you proper monitoring access. See inherited system support →
All major UK brands: SolarEdge, Huawei, Sunsynk, GivEnergy, Growatt, Solis, Enphase, Fronius, Fox ESS, Tesla Powerwall, Pylontech, Sofar, SolaX, Hanchu, Lux, Dyness, AlphaESS, Duracell Energy, and Sigenergy. Browse all brand pages →
It's free to enquire and have us take a look — we review your monitoring data and tell you what's wrong. If we can fix it remotely, it's £95, and you only pay if we actually fix it. If we can't, you pay nothing; any on-site visit is quoted in writing first, from £295. See full pricing →
Usually the same day. Most faults are confirmed in a single 30-minute remote session — we read your monitoring and live data while you describe what the system is doing — and you get a written summary of the cause and the fix straight after. We work Monday to Friday, 9am–7pm.
Tell us what's happening. We'll review your details and come back with a clear diagnosis path and a proposed time to talk.
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