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!
Add Battery to Existing Solar in Swansea
- Covered from Cardiff — next-day to 2-working-day surveys
- GivEnergy specialists — also SolarEdge, Enphase, Fronius, Solis
- FiT payments unaffected
Share your inverter brand and system size — we'll recommend the right GivEnergy battery, coupling method, and provide a written quote. Swansea is covered from our Cardiff base, around 40 minutes along the M4, so we run a free remote diagnostic the same day and book an on-site survey within the next working day or two.
Book consultationFree remote diagnosticFantastic service, I would highly recommend. From first contact my solar issue was resolved within 2 days. Wouldn't use anyone else.
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
A 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.
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
Thank you for your diligence. On this occasion the battery was able to be saved but they have given a route to hopefully arrange a repair from the manufacturer.
Swansea is full of FiT-era solar with no battery — and we cover it from Cardiff
South Wales took up the Feed-in Tariff in big numbers between 2011 and 2016, and most of those Swansea systems are still solar-only a decade later. They generate happily through the day, export the surplus for pennies, then buy it back at a much higher rate every evening. A battery closes that gap. Our engineer is based in Cardiff and covers Swansea — about 40 minutes west on the M4 — so we start with a free remote diagnostic the same day you get in touch, then book an on-site survey within the next working day or two.
FiT-boom era when most Swansea solar was fitted — solar-only, ready for a battery retrofit now
Free remote diagnostic, with a next-day or two-working-day on-site survey from our Cardiff base
Our most-installed retrofit battery in South Wales — pairs with any existing inverter brand
Some of those early Swansea systems were fitted by installers that have since closed — Consumer Energy Solutions Ltd, a Swansea ECO4 installer, entered administration in January 2026, and other South Wales firms have gone the same way. If yours was one of them, the panels are almost certainly still generating but may never have been upgraded. Adding a battery is straightforward: we identify the existing hardware, recover monitoring access, verify FiT registration, and retrofit a GivEnergy battery in a single process. No original documentation needed.
How a GivEnergy battery retrofit works with your specific inverter
Every inverter brand integrates with storage a little differently. Here's what the retrofit looks like for the brands most common across Swansea — with GivEnergy as the battery in almost every case.
GivEnergy is the dominant battery in Swansea retrofits. If you already have a GivEnergy AIO or hybrid and want more capacity, we add a slave or expansion battery to your existing stack — no new inverter needed. If your GivEnergy system isn't performing as expected, we diagnose and reconfigure remotely before recommending any new hardware. GivEnergy support → · add an expansion battery →
SolarEdge systems use DC optimisers on each panel with a central inverter. AC-coupling a GivEnergy battery alongside SolarEdge is straightforward — the battery inverter connects to the consumer unit independently. SolarEdge's own StorEdge interface exists but needs a compatible SolarEdge inverter. For most Swansea homes, an independent AC-coupled GivEnergy battery is cheaper and more flexible than the StorEdge route, and your panel-level optimisation continues unchanged.
Enphase converts DC to AC at each panel, so there's no central string inverter. That means DC coupling isn't an option — AC coupling is the only route, which is actually ideal. You add a GivEnergy battery inverter to the consumer unit, the CT clamp monitors total consumption, and the battery charges from surplus Enphase output. Enphase's own IQ battery exists but costs significantly more than a third-party AC-coupled alternative. We install both — your choice.
The most straightforward retrofit. Fronius IG, Primo, and Solis string inverters are simple solar-only units — AC-coupling a GivEnergy battery alongside them needs no changes to the existing system at all. If the Fronius or Solis is approaching end of life (10+ years), consider combining the inverter replacement with a DC-coupled battery in one visit — saves a second installation and often works out cheaper than two separate jobs.
AC or DC coupling? The right answer depends on your inverter
For most Swansea systems — the solar-only FiT-era arrays on terraces across Uplands, Brynmill and Townhill — AC coupling is the better option. DC coupling makes sense when an older inverter is already failing and due for replacement anyway.
Swansea-specific recommendation: If you have a SolarEdge or Enphase system, AC coupling is the only practical route — and a GivEnergy battery does the job perfectly. If you have a healthy Fronius or Solis, AC coupling is cheaper. If that Fronius or Solis is showing its age, DC coupling lets you swap the inverter and add a battery in one go. A free remote diagnostic tells you exactly where you stand — same day, before we drive over. Full technical comparison →
Battery systems we install across Swansea
Swansea's housing runs from tight terraces in Uplands, Brynmill and St Thomas to larger semis in Sketty, Killay and out towards Mumbles. A 4.8 kWh GivEnergy AIO suits a 2–3 kW terrace; a larger stack makes sense for a bigger system running Octopus Flux. We recommend on your system, usage and space — not on commission.
The most popular battery retrofit in Swansea by a wide margin. 4.8 kWh or 9.5 kWh in a single wall-mounted unit. Pairs with any existing inverter brand and expands with extra battery modules later. Optional EPS backup available. GivEnergy support →
Modular battery stack that scales from around 5 kWh upward. A strong choice for larger Swansea properties with bigger systems and high evening consumption. Works in both AC and DC coupling, with reliable firmware and a clean monitoring interface.
Compact and quiet — fits well in the under-stairs cupboards and small utility spaces common in Swansea's older terraced housing across Brynmill and Morriston. Solid app-based monitoring, and good value in the smaller-capacity range.
All offer AC and DC coupling with built-in EPS capability. Popular on full new-build installs across Swansea and the Gower. Brand choice often comes down to monitoring-platform preference and consumer-unit layout. We install and commission all three.
Already have a battery? Add extra storage → · GivEnergy expansion →
Battery retrofit pricing in Swansea
A GivEnergy AIO added to a solar-only system — ideal for Swansea's compact 2–3 kW FiT-era arrays. Captures the daily surplus on a terraced property and covers evening use through to bedtime. Capacity confirmed in your quote.
Already running a GivEnergy AIO or hybrid? Add a slave or larger expansion battery to your existing stack — no new inverter needed. Best for larger Swansea homes on time-of-use tariffs wanting more overnight capacity.
Hybrid inverter plus battery in one package — the hybrid inverter is quoted separately by capacity. The smart move if your Fronius or Solis is already failing — combine the inverter replacement with the battery in a single visit.
Every quote includes hardware, installation, CT clamp, commissioning, DNO G99 variation, and a written post-installation report. Swansea is covered from our Cardiff base, about 40 minutes west on the M4 — no travel surcharges, with the same pricing as anywhere across South Wales. Guide to adding an extra battery later →
Swansea installer closed down? Add a battery and we'll recover the whole system
Swansea solar firms have closed in recent years — Consumer Energy Solutions Ltd, a Swansea ECO4 installer, entered administration in January 2026, and other South Wales companies have gone the same way. If your installer is gone, your panels are almost certainly still generating, but you may have no monitoring, no documentation, and no one to call. We combine a battery retrofit with full system recovery in a single engagement: identify the hardware, recover monitoring, verify warranties, fit a GivEnergy battery, and leave you with a fully documented, actively managed system.
For former Consumer Energy Solutions customers in Swansea — including ECO4 grant installs: monitoring recovery, warranty claims, ongoing support.
Consumer Energy Solutions guide →Full fault diagnosis, maintenance, and ongoing support across all Swansea postcodes. All gone-bust installers →
Swansea solar repair →Swansea areas we cover for battery installation
The whole of Swansea and the Gower fall within our coverage from Cardiff — about 40 minutes west on the M4. Same pricing and no travel surcharges across SA postcodes. Out on the exposed Gower coast (Mumbles, Bishopston, Pennard), salt air and driven rain are hard on DC isolators and connectors, so we check those carefully during the battery survey.
For full fault diagnosis and ongoing support see solar repair in Swansea. We also cover battery retrofits and repairs across Cardiff and Newport.
Adding a battery in Swansea — common questions
Ready to keep your solar energy instead of giving it away?
Tell us your inverter brand, system size, and whether you're on a time-of-use tariff. We'll recommend the right GivEnergy battery size and coupling method, and send a written quote — no hidden charges, no pressure. If you're not sure about your system details, we work it out during the same-day remote diagnostic or the site survey.
- GivEnergy AC-coupled from £2,995 · DC-coupled from £3,495
- Covered from Cardiff — next-day to 2-working-day survey
- Not sure what you have? Free same-day remote diagnostic
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Got a solar fault or need a quick answer? Drop us a message — we usually reply within a few minutes. Mon–Fri, 9am–7pm.