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.
Sunsynk setup & how-to guides
- Free remote diagnostic
- No fix, no fee
- All major brands supported
Ron made more sense in 20 mins than our installer has done over the last 12 months There is a jungle out there and you need someone like Ron to give a comprehensive overview and solution
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.
Solar Tech Support is an absolute lifesaver. My solar and battery system stopped working completely, but after one quick phone call, they fixed the problem straight away. The original provider, GivEnergy, has gone into administration, leaving me entirely without support from the original installers. It was a terrible situation on GivEnergy’s part, but thankfully, Solar Tech Support came to the rescue!
Massively massively recommended. We had a big battery array (49kW across three phases) put in four years ago. c £35k cost. It’s been a total nightmare for many reasons, not least 1. our installer being totally useless and unresponsive and 2. Givenergy, our battery supplier, going bust. Long story short it had never worked anywhere near properly despite countless hours on phones and emails; the best we’d achieved was one third of the batteries working. Rather than write it off, I asked a PM friend to try to source someone who could come on site and review and revive the system. He found Solar Tech Support and Ron. Ron assured us he was the man to get it going again. After so many years of pain, I was not convinced but, true to his word, five hours later it was up and running. Lovely chap, super knowledgeable with a support team to lean on who are also clearly super technical. I honestly didn’t think there was much chance of getting this array going ever again so was absolutely delighted when Ron and team pulled it off. Bravo!
I’ve used Ron a couple of times regarding issues with my Givenergy inverter and batteries after Givenergy went bust. My system stopped working properly so it was a stressful time but Ron resolved the issues and got my system working properly again. He’s really helpful and knowledgeable and I wouldn’t hesitate to recommend him and to use him again if the need arose.
What actually needs setting up on a Sunsynk hybrid
On a Sunsynk the hardware rarely needs touching — it is the LCD configuration that decides whether the system behaves. The screen hides a lot behind eight icons (Basic, Battery, Grid, System Mode, Advance, Aux Load, Fault Codes and Li BMS), and the settings that matter most for a UK home all live under Battery and System Mode. Get the battery type, charge schedule and export mode right and the system does exactly what you want; get one wrong and it looks faulty when it is simply mis-set. Our hybrid inverter setup guide walks every screen in the order you would actually configure it.
Three things catch Sunsynk owners out more than any other. The clock does not auto-adjust for BST or GMT, so a one-hour drift quietly shifts your cheap-rate charge window off the tariff. Time slots cannot cross midnight, so an overnight window has to be split into two slots. And on lithium batteries the Protocol number under Li BMS must match your exact battery model, or BMS communication fails and the SoC reads zero. None of these are faults — they are settings.
As independent engineers we are happy for you to follow the guide and set it up yourself for free. If you would rather we did it, the remote diagnostic is free, a remote configuration or fix is from £75 on a no-fix-no-fee basis, and anything that genuinely needs an engineer on site starts from £245.
1 setup guides we cover
Each topic links through to an engineer-led step-by-step guide.
Sunsynk setup questions answered
Need a Sunsynk engineer?
Tell us what's happening with your Sunsynk system. Free remote diagnostic, no-fix-no-fee. Most configuration faults resolved during the 30-minute session.
- No fix, no fee — pay only if we resolve your fault
- Same-day response within within 4 hours during business hours
- Written report regardless of outcome
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