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Inverter Replacement in Swansea

Swansea saw heavy solar uptake during the FiT era — the 2011–2016 boom plus West Wales installer rollouts put thousands of systems on homes from the Uplands to Gorseinon. Those inverters are now reaching end of life. We cover Swansea, Gower and the surrounding towns from our Cardiff base, about 40 minutes west on the M4: a free same-day remote diagnostic confirms the fault first, then on-site work is scheduled next-day to two working days — GivEnergy and string-inverter stock to hand.
£795 · string inverter, all-in; hybrid from £1,495
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  • Covered from Cardiff — next-day to two working days
  • All of Swansea, Gower, and West Wales
  • DNO G99 variation included
Book inverter replacement

Tell us the inverter brand and model — or send a photo of the unit. Include the fault symptoms and your Swansea postcode. We'll confirm the replacement spec and give you a written quote.

Book replacementDiagnose first — free if we can't fix
5.0
Rated 5.0 on Google Read all 48 reviews

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.

David Bateman · Jun 2026 Google

When my GivEnergy battery started playing up it became basically useless and several companies I called said they couldn’t help. Solar Tech Support really knew their stuff, communicated very well and resolved the problem quickly. Without them I’d have had to buy a replacement battery.

A D · Jun 2026 Google

Contacted Solar Tech Support in desperation. After explaining the issues I had with my system a diagnosis was made and a solution proposed. Fantastic service, even contacted a manufacturer to arrange replacement parts for me. Great communications, explained all they were doing and what I had to do, clearly and precisly. Followed up to confirm all was ok. Excellent service.

Mr Machin · May 2026

I have a GivEnergy system consisting of two batteries, two inverters and a controlling EMS (Energy Management System) which has not worked since Nov 2025. After six months I discovered Solar Tech Support, reached out to them and Ron phoned me back – how often do you get that service? Could not be more helpful – worked directly with me over the phone, outside what I would call normal working hours. Lucid explanations and we were able to discuss the issues and history using camera and email history. As this was a very rare setup, Ron was able to access an EMS expert in the field to confirm the solution. One sunny day in, I am now only paying for standing charge and a few pence for spikes in grid consumption while battery catches up with house demand.

Ian · May 2026

I can’t praise this firm enough. After hearing my solar panels rattling in very windy conditions, I contacted Solar Tech (as my installers no longer trade). Ronald was fantastic at explaining what he thought the issue was likely to be. Communication was great throughout keeping me fully updated. The team worked really hard on the day to carry out the necessary work. I can now sleep soundly at night without worrying about the solar panels on my roof. I would thoroughly recommend this firm. Thank you for sorting the problem out.

Carolyn Addison · Jun 2026 Google

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!

sohaib maroof · Jul 2026 Google
Swansea context

Why Swansea is hitting the inverter replacement window now

Swansea went solar early. The 2011–2016 feed-in tariff boom put PV on thousands of homes from the Uplands and Sketty out to Morriston and Gorseinon, and a string of West Wales installers fitted systems across the city and Gower during the FiT period. The inverters from that era — predominantly Fronius, Solis, and Growatt string units — are now 10–15 years old, exactly the window where string inverters start to fail. More recently a wave of GivEnergy hybrid retrofits added battery storage to existing arrays. Both generations now turn up in our inbox: ageing string inverters dying, and newer GivEnergy units throwing comms or firmware faults.

10–15 yr

Age of most Swansea FiT-era systems — entering the failure window

Same day

Free remote diagnostic — we confirm the fault before any visit

From Cardiff

Covered from our Cardiff base — about 40 min west on the M4

Swansea's setting shapes the job. The exposed coastal position matters: the Gower peninsula is an Area of Outstanding Natural Beauty taking the full force of salt-laden Atlantic air and driven rain, and out at Mumbles, Bishopston, and Pennard that corrosive environment accelerates wear on enclosures, DC isolators, and connectors far faster than an inland install. Inland, the older terraces of Brynmill, Townhill, and St Thomas bring tight loft runs and shading that punish a poorly sited string inverter. We factor all of that into the replacement spec — siting, isolation, and an enclosure rated for the local environment — rather than just bolting a like-for-like unit back on the same bracket.

Swansea brands

Inverters we replace most often in Swansea

Swansea's mix splits cleanly between two generations: FiT-era string inverters from the 2011–2016 boom now reaching end of life, and newer GivEnergy hybrid retrofits. Each has a different failure pattern and replacement path.

GivEnergy

The dominant battery-retrofit brand — common on hybrid installs across Sketty, Mumbles, Killay, Uplands, and out toward Gorseinon. Many GivEnergy faults are firmware, CT-clamp, or communication issues rather than hardware failure, so a diagnostic comes first. When the unit has genuinely failed we fit a like-for-like or upgraded Gen2/Gen3 hybrid and re-commission the battery. GivEnergy hub →

Fronius

Galvo and Primo models from 2011–2014 installs, very common on private homes across the Uplands, Sketty, and Bishopston. The Galvo series is now well past its expected lifespan. Typically replaced with a current hybrid unit if the homeowner wants to add battery storage to an existing FiT system.

Solis

Mini and 4G models, high volume from FiT-era and West Wales installer rollouts across Morriston, Townhill, Bonymaen, and St Thomas. The Mini series typically fails at the relay or DC isolation after 8–10 years — a consistent pattern we see right across South Wales, made worse on the Gower coast by salt-air corrosion.

Growatt / SolarEdge / SMA

Growatt ShineWay and MIN units from 2015–2018 installs reaching end of life, often fitted by smaller West Wales firms since closed — a diagnostic confirms failure vs a fixable comms fault. SolarEdge on premium installs around Mumbles and Langland; SMA Sunny Boy on older high-end systems across Gower.

We also replace Enphase, Sunsynk, Huawei, Fox ESS, SolaX, and all other major UK brands. Full inverter replacement service details →

Pricing

Inverter replacement pricing in Swansea

String inverter
£795

Single-phase, 2–6 kW. Same-spec or updated equivalent. The bread-and-butter replacement for Swansea's FiT-era Fronius, Solis, and Growatt fleet.

Hybrid inverter
From £1,495

Swap a failed string unit for a hybrid — typically a GivEnergy — that manages both solar and battery. The most popular upgrade for Swansea homes adding storage to an ageing FiT array.

Three-phase / large
From £1,200

8 kW+ and three-phase units. Assessed individually. Full pricing details →

All prices include supply, decommission, installation, commissioning, DNO G99 variation, and post-installation report. Swansea is covered from our Cardiff base, about 40 minutes west on the M4 — we'll confirm any travel and the visit date when you book. Full inverter replacement pricing and coverage →

Landlord or inherited system?

Bought a Swansea property with solar — and now the inverter has failed

Swansea's large student and rental market — Brynmill, the Uplands, and the streets around the university especially — means many owners have inherited solar systems they know very little about. The original installer may have gone bust, monitoring access may be lost, and the FiT registration may not have transferred properly. When the inverter fails, landlords often don't know where to start. We handle the full recovery alongside the physical inverter replacement.

Manufacturer warranty check — may still cover the hardware
FiT / SEG transfer and monitoring recovery
Tenant scheduling and documented handover
Swansea installer gone bust?

Consumer Energy Solutions Ltd, a Swansea installer, entered administration in January 2026 — leaving local systems without support. We pick up orphaned installs and have full installer-recovery guides too.

Installer recovery guides →
Solar Health Check — £145

Full system assessment if you've inherited a solar system and want to know its condition before deciding on repairs or upgrades.

Health check details → Book inverter replacement
Coverage

Areas we cover for inverter replacement in Swansea

We cover Swansea from our Cardiff base, about 40 minutes west on the M4. A free remote diagnostic confirms the fault the same day, and on-site visits are scheduled next-day to two working days across the whole city, the Gower peninsula, and the nearby towns of Llanelli and Neath.

Mumbles Sketty Uplands Killay Morriston Gorseinon Gowerton Townhill Brynmill St Thomas Bonymaen Bishopston Pennard Llanelli Neath

We also cover the wider Gower peninsula and the South Wales corridor back toward Cardiff and Newport. All solar services in Swansea → · Cardiff → · Newport →

FAQ

Inverter replacement in Swansea — common questions

For a typical single-phase string inverter in Swansea, the all-in price is £795 — covering the replacement unit, safe removal of the old hardware, installation, full commissioning, DNO G99 variation notification, and a documented post-installation report. If you want to upgrade to a hybrid inverter for battery storage, that starts from £1,495. Larger three-phase systems are quoted individually from £1,200. Swansea's install base is heavily weighted toward FiT-era Fronius, Solis, and Growatt units, plus newer GivEnergy retrofits, so we keep common replacement models to hand. Not sure the inverter is the issue? A free remote diagnostic pinpoints the problem before you commit — same-day, so you only book an on-site visit if you genuinely need one.
Yes — GivEnergy is one of the brands we work on most. A lot of Swansea homes added a GivEnergy hybrid inverter and battery during the recent retrofit wave, and we see them across Sketty, Mumbles, Killay, and out toward Gorseinon. The key thing: a large share of GivEnergy faults are firmware, CT-clamp, or communication issues rather than a dead unit, so a free remote diagnostic often saves you the cost of a full replacement — and a 40-minute trip from Cardiff you may not need. When the inverter genuinely has failed, we supply and fit a like-for-like or upgraded GivEnergy unit and re-commission the battery. Our GivEnergy hub covers the common fault patterns.
All of Swansea — Mumbles, Sketty, Uplands, Killay, Morriston, Gorseinon, Gowerton, Townhill, Brynmill, St Thomas, and Bonymaen — plus the Gower peninsula (Bishopston, Pennard) and the nearby towns of Llanelli and Neath. We cover Swansea from our Cardiff base, about 40 minutes west on the M4, so a free remote diagnostic comes first and on-site visits are scheduled next-day to two working days across the wider South Wales corridor.
Swansea is covered from our Cardiff base, about 40 minutes west on the M4. A free remote diagnostic gives you a confirmed fault assessment the same day, and once the quote is signed off and we've confirmed stock, we're usually on-site next-day to two working days. The physical swap is a half-day job — decommission, mount, wire, commission, and test. Pricing is the same flat rate; we'll confirm the visit date when you book.

Inverter failed in Swansea? Get a replacement quote.

Drop us the inverter brand, model, and what it's doing wrong — or photograph the data label and send it through. We'll match the replacement to your array, confirm pricing in writing, and schedule the swap. We cover Swansea from our Cardiff base — a free same-day remote diagnostic first, then on-site next-day to two working days.

  • String inverter £795 · hybrid from £1,495
  • Covered from Cardiff — next-day to two working days
  • Not sure it's the inverter? Free remote diagnostic

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