From Cardiff Bay to Whitchurch, Penarth to Caerphilly — Gen 1 to Gen 3, All-in-One, AC-coupled. Tell us the model and what's happening. Most faults are diagnosed remotely the same day; on-site is local and fast.
Book diagnosticHow the diagnostic worksA really big thank you to Ron and his team, he has vast amounts of knowledge and got my system back up and running, also good to get on with. I was absolutely lost as to know what to do, no help from installer and somehow came across Ron and am I glad I did. I would definitely definitely recommend him to anyone who has faults with there solar system, any make I would say. Thanks again Ron a pleasure meeting you.
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.
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 .
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.
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!
Excellent response to diagnose a problem on our SolarEdge installation. Kept us informed at every step. Diagnosis quickly completed and solution implemented.
Cardiff's solar story runs in two waves. The Feed-in Tariff years (2011–2016) put string-inverter solar on thousands of roofs — many on the dense Victorian and Edwardian terraces of Cathays, Roath, Canton, Grangetown and Pontcanna, alongside Welsh Government and council-backed schemes (Nest, Arbed, and council solar programmes) that fitted PV across social and private housing. Then the energy crisis brought a GivEnergy battery boom — retrofits onto those ageing FiT systems, plus Gen 3 hybrids and All-in-One units on newer installs in Llanishen, Cyncoed, Radyr and the new-build fringes. The hardware is everywhere. Local aftercare often isn't — which is where a Cardiff-based independent comes in.
A large share of Cardiff's GivEnergy batteries were AC-coupled onto solar fitted in 2011–2016 across Roath, Canton, Heath and Whitchurch. Bolting a modern battery onto a decade-old string inverter creates charge-flow and CT clamp challenges the original installer didn't always resolve — and on terraced roofs, chimney shading from neighbouring stacks complicates the generation picture further.
Nest, Arbed and council-led solar programmes put PV — and increasingly GivEnergy storage — onto homes across Cardiff and the Vale. Many homeowners inherited these systems, or were never shown how the battery and tariff settings work. Monitoring is often still locked to an installer or scheme account the resident can't access.
GivEnergy Gen 3 hybrids and All-in-One units on newer installs around Llanishen, Cyncoed, Radyr, Pontprennau and Pentwyn. These are modern, capable systems — but Gen 3 firmware is still maturing, and we regularly see charge-schedule behaviour that differs from the Gen 2 units homeowners researched before buying.
Cardiff Bay, Penarth, Barry and Grangetown sit on the Severn estuary, where salt-laden air accelerates corrosion of outdoor and loft-mounted string inverters fitted in the FiT years. As these units reach end of life, an inverter swap — often to a GivEnergy hybrid that adds battery readiness — is one of the most common upgrades we do along the coast.
These are the faults we diagnose on Cardiff GivEnergy systems regularly. Most are resolved remotely, same day. Each links to a detailed guide.
The single most common fault on Cardiff GivEnergy systems. Solar panels generating but the battery stays empty. On retrofit installs (a battery added to an existing FiT-era system), the cause is almost always a CT clamp fitted in the wrong direction or eco mode left disabled after commissioning. On hybrid systems, it's usually a charge target or SOC floor misconfiguration. Resolved remotely via the portal.
Battery shows 100% but the house pulls from the grid instead of the battery. On Cardiff systems this is overwhelmingly a CT clamp direction issue — the clamp tells the inverter which way electricity flows, and if it's backwards the system thinks the house doesn't need power. It's common on terraced-house consumer units in Cathays and Roath where the clamp was clipped on quickly. One of the fastest fixes we do — usually resolved in the diagnostic session itself.
Charge schedule set but the battery doesn't fill overnight. Common on Cardiff systems where homeowners switched to Octopus Go or Intelligent Go after the GivEnergy system was installed — the charge window needs updating to match the new tariff's cheap-rate hours. Also caused by firmware updates resetting the charge schedule back to defaults.
GivEnergy app or portal says the system is offline. The system is almost certainly still working — the WiFi dongle has lost its router connection. Common after BT, Sky or Virgin Media router restarts, broadband provider changes, or when the router assigns the dongle a new IP. We reconnect it remotely or walk you through the dongle reset.
Rapid clicking from the inverter, system fails to connect to the grid, generation stops. A known hardware fault on some GivEnergy units — the internal relay has failed and needs physical repair or inverter replacement. This is one of the few faults that needs an on-site visit, and being Cardiff-based we can usually get there same-day to next-day. We handle the full warranty claim process and the on-site swap where needed.
All GivEnergy problem guides → · GivEnergy fault codes → · Inverter replacement →
A correctly configured GivEnergy system on a good time-of-use tariff should be cutting a meaningful chunk off a typical Cardiff household's bills. If yours isn't anywhere near what you expected, the charge schedule, eco mode, export limit, or tariff integration is almost certainly wrong. We audit the entire configuration and optimise it for your specific tariff and usage pattern — remotely, the same day, in a single session.
Cardiff saw a wave of GivEnergy installations during the battery boom — from national chains and local firms alike. Many have since scaled back, stopped doing aftercare, or closed entirely; the Cardiff installer PV Solar Solutions, for instance, was dissolved back in 2015, leaving FiT-era customers without an aftercare route. Whatever the situation, the GivEnergy 12-year warranty is with the manufacturer, not the installer — and as a local independent we handle the full transition.
Move the GivEnergy system from the installer's portal account to your own homeowner account. Full data history preserved. Monitoring setup guide →
Check every setting — charge schedule, eco mode, export limit, CT clamp direction — and optimise for your current tariff and usage. Many installer-commissioned and Welsh-scheme systems were left on defaults.
Confirm your GivEnergy warranty status and the routes still open after the manufacturer's administration. If you have a covered fault, we handle the claim — and if hardware needs replacing, our Cardiff-based engineer can carry out the on-site swap. GivEnergy warranty details →
All bust installer guides → · Full Cardiff coverage → · Newport → · Swansea →
Whether it's a Gen 3 firmware issue, a battery not charging, an ageing inverter that needs swapping, or an orphaned system from a defunct installer — tell us the model and your Cardiff postcode. We'll confirm remote or on-site, and give you a fixed price upfront.
I’ve worked on hundreds of GivEnergy systems and know the kit inside out. If yours is playing up, my promise is simple — no fix, no fee: just £95 if we fix it, free if we don’t.
We use cookies to measure traffic and improve our ads — including sharing limited, hashed details with Meta (Facebook) and Google to measure ad performance. Accept, or decline for essential cookies only. Privacy policy