Prompt and useful support regarding my Sunsynk system lack of performance. Ronald simplified the technical issues to make them understandable. Many thanks, looking forward to follow up.
Patrick Keenan · May 2026 Trustpilot
Engineer-to-engineer · B2B · UK-wide · All major brands
Technical support for solar installers — engineer-to-engineer
Complex fault you can't resolve remotely. A customer who needs ongoing aftercare you don't have capacity for. A warranty claim that needs an independent report. We work directly with UK solar installers as a trusted technical partner — discreetly, professionally, and on your terms.
- Independent, engineer-led
- All major brands supported
- Written reports for warranty & disputes
I've spoken to Ron a couple of times with issues with my Givenergy installation. Such a friendly knowledge guy very highly recommended. Thank you very much for resolving my issues
michael fairhurst · May 2026 Google
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.
Paul Riddick · Jul 2026 Google
My GivEnergy solar and battery system is failing intermittently, GivEnergy is in administration and so is my installer, so it was a relief to get Ron’s expert advice.
Steve Trossell · Jun 2026 Google
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.
Christopher · Apr 2026 Trustpilot
After GivEnergy went into liquidation, just my luck, my battery started playing up (internal board crashed). Contacted my installer - not interested! Found Solar tech support on a Google search. Sooo glad I found this company! Ron is extremely helpful and has plenty of experience. He soon confirmed what the fault was, and helped me to get my system up and running again. Now moved my GivEnergy account to Solar tech support, and will definitely use again if I have more issues. Unusual to find such a helpful company in these times, no morons reading scripts, just direct contact with the engineer.
Keith Ballard · Apr 2026 Trustpilot
Who this is for
You have a complex fault you can't resolve
The system is behaving unusually and neither the manufacturer support line nor your own diagnostics have identified the cause. You need a second opinion from someone who works at the engineering level — not a scripted helpdesk. We handle the diagnostic and give you a clear answer.
You need an aftercare partner for your customers
You install — you don't want to be the first call when a battery stops charging eighteen months later. We provide structured aftercare support for your customer base: fault triage, remote diagnostics, and on-site repair. Referral and white-label arrangements available.
You need an independent report
Customer dispute, warranty claim, or a post-install snag check that needs to be done by someone other than the installing team. We provide independent engineer's reports that are accepted by the major UK manufacturers still trading and suitable for use in formal dispute processes.
Services
What we provide for installers
These services are available directly to UK solar and battery installers. All work is delivered by experienced solar engineers — not subcontracted.
Diagnostic overflow
Remote fault diagnostic — engineer overflow
When your own diagnosis hasn't found the cause, we take over. We review all available monitoring data, error logs, and system configuration to identify the root fault. You receive a written report with the cause, evidence, and recommended resolution — typically within 24 hours of receiving access.
Free — £125 only if we fix it remotely · See remote diagnostic →
QA inspection
Post-install snag inspection
An independent on-site inspection after installation is complete. We check physical quality, commissioning, settings, CT clamp orientation, documentation, and cosmetic finish. Written snagging report gives your customer confidence — and protects you against post-handover disputes.
On-site · From £295 →
Warranty support
Independent warranty claim report
A formal independent engineer's report to support a manufacturer warranty claim or customer dispute. We diagnose the fault, establish whether it falls within manufacturer warranty terms, document the evidence, and produce a structured written report. Accepted by Sunsynk, SolarEdge, Growatt, Solis, and the other major UK manufacturers still trading.
See warranty claim support →
Technical support
Installer technical support — engineer-to-engineer
Complex fault you can't crack, commissioning issue on a new install, firmware question, or manufacturer escalation that's going nowhere. We provide engineer-to-engineer technical support remotely. Confidential — your customer never knows.
£95 · See technical support →
Partnership
Aftercare & maintenance partnership
A structured arrangement where we handle fault calls, diagnostics, and maintenance visits for your customer base — under your brand or ours. We triage incoming customer issues, resolve what we can remotely, and escalate to on-site where needed. Suitable for installers who want to offer a guaranteed aftercare service without carrying the overhead. Pricing based on customer volume.
Discuss partnership terms →Installing commercial systems?
We provide independent O&M contracts, emergency repair, system takeover, and performance audits for commercial solar installations. If your commercial clients need ongoing maintenance or you want to offer aftercare without carrying the overhead, we can work together.
Process
How working with us works
No account setup, no minimum commitment for one-off jobs. Ongoing partnerships are agreed in writing before any work begins.
1
Get in touch with the details
Use the form below or call us directly. For fault diagnostic overflow, tell us the brand, model, what the system is doing, and what you've already checked. For inspections or reports, give us the address and any relevant customer background. For aftercare partnerships, outline your customer volume and what you need covered.
2
We scope the work and confirm the cost
For diagnostics and inspections, we confirm the cost before starting — no surprises. For ongoing partnerships, we agree a clear arrangement in writing: what's included, turnaround expectations, pricing, and escalation process. We don't start work until both sides are clear.
3
Work is delivered — report provided
Remote diagnostics come with a written findings report. On-site inspections include a condition report with photographs. Warranty reports are structured for manufacturer submission. You get everything in writing — you decide what to share with your customer.
Why work with us
STS was founded by an engineer who spent years in the solar industry at scale — running technical support teams and handling the kinds of faults that don't appear in the manual. We've seen most failure modes across most major brands. When you send us a fault you can't resolve, you're not going to a helpdesk — you're going to someone who has dealt with the same hardware.
We are genuinely independent. We are not tied to any manufacturer or distribution network, and we have no reason to recommend a fix that isn't the right fix. That independence is why our warranty reports carry weight.
We understand that working with an outside technical partner requires trust. Anything you share with us — customer details, site specifics, fault history — stays confidential. We don't contact your customers directly unless that's been agreed. We don't take on ongoing relationships with customers you've referred to us for a one-off job.
For installers who want a long-term aftercare partner, we're structured to handle that at volume — with agreed SLAs, a clear escalation path, and the engineering capability to back it up. Read more about how we work.
Brands supported
All major UK inverter and battery brands — GivEnergy, Sunsynk, SolarEdge, Growatt, Solis, Fox ESS, Huawei, SMA, Fronius, Enphase, and more
Coverage
Remote diagnostic UK-wide. On-site inspection across England and Wales — contact us for Scotland and Northern Ireland.
Turnaround
Remote diagnostic report: 24hrs standard, same-day for urgent. On-site: scheduled to suit the job. Warranty reports: 3–5 working days.
Installer questions answered
Yes — we support all major UK inverter and battery brands including GivEnergy, Sunsynk, SolarEdge, Growatt, Solis, Fox ESS, Huawei, SMA, Fronius, Enphase, and Tesla Powerwall. If a system has been installed in the UK, we can support it. For less common brands, assess on a case-by-case basis — get in touch and we'll confirm. Full brand coverage is listed on the brands page.
Standard turnaround for a remote diagnostic report is 24 hours from receiving monitoring access and system details. For urgent faults — where a customer system is completely down — same-day response is available. Contact us directly by phone for emergency turnaround rather than using the form. For regular diagnostic overflow work, we're typically available within a few hours of receiving the referral.
Yes — all remote diagnostics include a written findings report. For warranty claims and customer disputes, we provide a formal independent engineer's report with fault evidence, photographs where applicable, a clear statement of cause, and a recommendation. These reports are structured to meet the requirements of all major UK inverter and battery manufacturers and are suitable for use in formal dispute processes. See the warranty claim support service for more detail.
Yes. We offer both referral and white-label aftercare arrangements. Under a referral model, you pass the customer to us and we handle the relationship directly. Under a white-label model, we handle all customer-facing work under your brand. In either case, we never compete for the original installation relationship — we're a support partner, not a sales channel. Pricing for ongoing aftercare is agreed based on customer volume and service level. Get in touch to discuss what you need.
Get in touch
Ready to work together?
Tell us what you need. We'll come back with a clear scope and cost — usually same day. No obligation to proceed, no account setup required for one-off jobs.
- Written report included with every diagnostic
- Cost confirmed before work begins
- Confidential — your customer details stay private
Service notice
We’re busier than ever. Thank you for your patience.
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.
Ronald Director, Solar Tech Support
On-site: Yorkshire only, for now
Remote: UK-wide, as usual
Remote fix: £125 if we fix it, no charge if we don’t
Replies: within 7 days
We use cookies to measure traffic and ads, sharing limited hashed data with Meta and Google. Decline keeps only essential cookies. Privacy policy
STS Solar Tech Support
Usually replies within minutes
Hi there!
Got a solar fault or need a quick answer? Drop us a message and we usually reply within a few minutes. Mon–Fri, 9am–7pm.
Start WhatsApp Chat
Got a solar fault or need a quick answer? Drop us a message and we usually reply within a few minutes. Mon–Fri, 9am–7pm.
End-to-end encrypted