Inverter Replacement in Barnsley
Barnsley is 20 minutes from our Leeds base — close enough for same-week scheduling on every job. The borough was one of the biggest beneficiaries of government-backed solar schemes in South Yorkshire, with Mark Group installing Fronius Galvo inverters on thousands of homes between 2010 and 2014. Those units are now past their expected lifespan and we're replacing them regularly across the district.
Tell us the inverter brand and model — or snap a photo of the label. Include the fault symptoms and your Barnsley postcode. We'll match the replacement to your array and confirm pricing in writing.
Book replacement → Diagnose first — £75 →Barnsley's solar stock is almost entirely government scheme Fronius — and they're all failing at once
The Barnsley borough had one of the highest per-capita solar uptakes in South Yorkshire during the Feed-in Tariff era. Mark Group was the dominant installer, rolling out 2–4 kW arrays on thousands of ex-council and private homes between 2010 and 2014 under government energy efficiency programmes. Almost every one of those systems used a Fronius Galvo string inverter. At 11–15 years old, those Galvo units are now in the tail end of their lifespan — and the failure rate has accelerated sharply over the past two years. We're seeing multiple Barnsley replacements every week.
From our Leeds base — same-week scheduling across Barnsley borough
Age of the borough's Fronius fleet — failures are accelerating
Early Barnsley registrations earn 15–40p/kWh — a dead inverter costs real money
The financial impact of a dead inverter in Barnsley is often higher than people realise. Many borough homeowners are on early FiT tariffs paying 15–40p per kilowatt-hour of generation. When the inverter stops, generation drops to zero and the FiT payment falls to the deemed export element only — a fraction of the full rate. Replacing the inverter restores everything, and on the higher tariff bands the £795 replacement cost can pay for itself within 12–18 months through recovered FiT income alone.
Inverters we replace in the Barnsley borough
Barnsley has the least diverse inverter mix in our coverage area — Fronius dominates so heavily that most weeks every Barnsley replacement is the same unit. That predictability means we carry stock and the process is fast.
The Galvo series accounts for the vast majority of Barnsley replacements. Mark Group installed these across Dodworth, Wombwell, Hoyland, Darton, Royston, and Cudworth between 2011 and 2014. The failure mode is consistent: relay degradation after 10–12 years causing the inverter to stop reconnecting to the grid after sunrise. We carry Galvo-equivalent replacement stock locally so turnaround is typically next-day once the quote is approved.
A smaller number of Primo units were installed on later Mark Group and private installs from 2014–2016, particularly in Penistone, Silkstone, and Cawthorne. The Primo is a more modern design with a longer typical lifespan, but early models are now entering the failure window. Earth fault shutdowns and arc fault detection errors are the most common Primo issues we see.
Solis Mini and Growatt ShineWay units appear on a handful of smaller scheme installs and private purchases across the borough. Lower volume than Fronius but the same predictable failure patterns we see everywhere — relay and DC isolation failures on the Solis, and communications board issues on the Growatt. Both are straightforward replacements.
A growing number of Barnsley homeowners are retrofitting GivEnergy hybrid inverters and batteries onto their existing FiT arrays — either as a planned upgrade or as a combined inverter replacement and battery addition. Faults on these newer systems are typically firmware or communication issues rather than hardware, and are often resolved remotely.
We also replace SolarEdge, Enphase, SMA, Sunsynk, Huawei, Fox ESS, SolaX, and all other major UK brands. Full inverter replacement service details →
Inverter replacement pricing in Barnsley
Single-phase, 2–6 kW. The standard Fronius Galvo replacement that makes up the bulk of our Barnsley work. All-inclusive — no extras, no surprises.
Replace your dead string inverter with a hybrid and add battery storage in one visit. Saves a second call-out later and protects your FiT registration in a single swap.
8 kW+ and three-phase units. Less common in Barnsley's residential stock but assessed individually. Full pricing details →
Every price includes hardware, labour, commissioning, DNO G99 variation, and written report. FiT registration unaffected by like-for-like replacement — we confirm capacity match in the quote. Yorkshire-wide pricing and coverage →
Mark Group installed most of Barnsley's solar — and went bust in 2015
Mark Group was the single largest residential solar installer in the Barnsley borough, running government-backed energy efficiency programmes across the district for years. When they went into administration, thousands of local homeowners lost their installer, their monitoring access, and their first point of contact for faults. A decade on, those systems need attention — and we're the local replacement. Based in Barnsley, carrying stock, and handling every part of the recovery.
The FiT maths: how quickly does a Barnsley replacement pay for itself?
Barnsley's early FiT registrations are some of the most valuable in the country. If your system was registered in 2011–2012, you could be earning 21–43p per kWh of generation on top of the export tariff. A typical 3 kW Barnsley system generates around 2,500–2,800 kWh per year. At 21p/kWh generation tariff alone, that's £525–£588 per year in FiT income — meaning a £795 inverter replacement pays for itself in under 18 months. Every day the inverter is down, you're losing money.
Store your surplus generation instead of exporting at the lower rate. Works alongside your existing panels and FiT meter — no registration changes needed.
Battery options →Keep essential circuits live during a power cut using your battery. Requires a hybrid inverter with EPS output — something to consider if you're replacing anyway.
EPS details →Areas we cover for inverter replacement in the Barnsley borough
Barnsley is 20 minutes from our Leeds base. Every village and estate in the borough is within easy reach, and we carry common Fronius and Solis replacement stock for same-week scheduling.
We also cover nearby Wakefield, Sheffield, and the wider Yorkshire region. Full Yorkshire coverage → · All solar services in Barnsley →
Inverter replacement in Barnsley — common questions
Barnsley inverter replacements start at £795 for a standard single-phase string inverter — that's an all-in price covering the new unit, safe removal of the old one, fitting, commissioning, DNO G99 variation filing, and a written post-installation report. Hybrid replacements for homeowners who want battery compatibility start from £995. Three-phase and larger systems from £1,200. Barnsley is 20 minutes from our Leeds base, and we carry common Fronius and Solis replacement stock — scheduling is typically within the same week. Not sure the inverter is actually faulty? A £75 remote diagnostic identifies the problem before you spend on hardware.
Yes — and we do it most weeks. Mark Group was the single biggest installer in the Barnsley borough, running government-backed schemes across the district before going into administration in 2015. Almost all of those installs used Fronius Galvo inverters on 2–4 kW arrays, and at over 10 years old, the Galvo units are past their expected lifespan. Your manufacturer warranty on the hardware is separate from Mark Group — it may still cover the replacement. We check that as part of the process, alongside MCS certificate recovery and FiT registration verification. Full Mark Group guide →
No. A like-for-like inverter replacement — same capacity or lower — doesn't affect your FiT registration. You don't need to notify Ofgem or your FiT licensee. We confirm the capacity match in writing as part of the quote so there's no ambiguity. What does affect your FiT income is leaving the inverter dead — every day without generation is money lost, and on the higher early Barnsley tariffs (21–43p/kWh), that adds up fast. The replacement cost typically pays for itself in well under two years.
Barnsley is 20 minutes from our Leeds base, so turnaround is quick. Once you approve the quote and we confirm the replacement unit is in stock — which it usually is for Fronius and Solis models — we can typically schedule within the same week. The physical swap takes a morning or afternoon: isolate, remove the old unit, mount and wire the replacement, commission, and verify output before we leave.
Barnsley inverter down? We're local — let's fix it.
We're based in Barnsley, we carry common replacement inverters, and we can usually get to you within a day or two. Send us the brand and model — or just a photo of the label — and we'll have a fixed-price quote back to you the same day. Every day without generation is lost FiT income.