Inverter Replacement in Wakefield
The Wakefield district had one of the highest uptakes of government-backed solar schemes in West Yorkshire. Mark Group alone installed thousands of systems across Wakefield, Ossett, Castleford, and Pontefract before going into administration in 2015. Those inverters — mostly Fronius Galvo and Solis Mini units — are now over 10 years old and failing. We're 25 minutes away, carry common replacement stock, and schedule most swaps within the same week.
Tell us the inverter brand and model — or send a photo of the unit. Include the fault symptoms and your Wakefield postcode. We'll confirm the replacement spec and give you a written quote.
Book replacement → Diagnose first — £75 →Why the Wakefield district is seeing a wave of inverter failures
The Wakefield district — covering Wakefield city, Ossett, Castleford, Pontefract, Normanton, Featherstone, and Hemsworth — was a major beneficiary of government energy efficiency programmes during the FiT era. Mark Group was the dominant installer, rolling out 2–4 kW arrays on thousands of homes between 2010 and 2014. Those systems used Fronius Galvo and Solis Mini string inverters almost exclusively, and at 10–15 years old, they're now in the failure window. The pattern is consistent: the inverter stops producing, the generation meter flatlines, and the FiT payment drops to the export-only element.
Age of most Wakefield systems — well into the replacement window
From our base — Wakefield is core coverage with same-week scheduling
Most Wakefield installs are registered on the Feed-in Tariff — we protect your registration
The FiT angle matters here. Many Wakefield homeowners are receiving generation tariff payments of 15–20p per kWh on older registrations. A dead inverter means zero generation and zero payment. Replacing the inverter restores both, and the FiT registration transfers automatically — no paperwork needed as long as the system capacity stays the same. We confirm this in the quote so there are no surprises.
Inverters we replace most often in the Wakefield district
The brand mix in Wakefield is narrower than larger cities — the government scheme era means two or three brands account for the vast majority of systems. Each has a consistent failure pattern.
Galvo and Primo models dominate across central Wakefield, Ossett, and Horbury. These were the default on Mark Group installs from 2011–2014. The Galvo series is now well past its expected lifespan — relay failure and earth fault shutdown are the two most common failure modes we see. Typically replaced with a current hybrid unit if the homeowner wants to add battery storage alongside the swap.
Mini and 4G models from council scheme rollouts across Castleford, Pontefract, Normanton, and Featherstone. Very high volume of identical units on similar 2–3 kW arrays. The Mini series typically fails at the relay or DC isolation after 8–10 years — it's the most predictable replacement we do. We carry Solis replacement stock so turnaround is fast.
ShineWay and MIN models from 2015–2018 installs across Hemsworth, Knottingley, and surrounding villages. These systems are newer but the Growatt units have a shorter expected lifespan than Fronius or Solis. A diagnostic confirms whether the fault is a full inverter failure or a fixable firmware or communications issue.
GivEnergy on newer battery retrofits — particularly popular in Wakefield since the energy price rises. Faults here are often firmware or communication issues rather than hardware failure. SMA Sunny Boy on a small number of older premium installs. We replace both.
We also replace SolarEdge, Enphase, Sunsynk, Huawei, Fox ESS, SolaX, and all other major UK brands. Full inverter replacement service details →
Inverter replacement pricing in Wakefield
Single-phase, 2–6 kW. Like-for-like or current equivalent. The most common replacement on government scheme Fronius and Solis systems across the Wakefield district.
Upgrade from string to hybrid for battery and EPS compatibility. The smart move if you're planning to add storage to an existing FiT system — one swap instead of two visits.
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. FiT registration is not affected by a like-for-like replacement. Yorkshire-wide pricing and coverage →
Mark Group installed your system — and now the inverter has failed
Mark Group was the largest installer in the Wakefield district through government energy efficiency schemes. They went into administration in 2015, leaving thousands of homeowners without support. Those systems are now well past the 10-year mark and the inverters are reaching end of life. We replace inverters on former Mark Group systems every week — and we handle the full recovery alongside the swap.
Replacing your inverter? Consider upgrading to hybrid.
If your string inverter has failed and you're paying for a replacement anyway, it's worth considering a hybrid inverter instead of a like-for-like swap. A hybrid handles both solar generation and battery management in one unit — so when you're ready to add a battery, there's no second visit and no second inverter cost. For Wakefield homeowners on older FiT rates of 15–20p per kWh, storing surplus generation in a battery rather than exporting at the lower SEG rate can significantly improve the financial return.
Keep your FiT payments and store surplus generation for evening use. Works alongside your existing panels and meter.
Battery options →Keep essential circuits running during a power cut using your battery. Requires a hybrid inverter with EPS capability.
EPS details →Not sure whether a hybrid upgrade is worth it for your system? A remote diagnostic at £75 includes a recommendation on whether a like-for-like or hybrid replacement makes more sense for your setup and tariff.
Areas we cover for inverter replacement in the Wakefield district
We cover the whole Wakefield metropolitan district. Wakefield is one of our core coverage areas — about 25 minutes from base with same-week scheduling on most replacements.
We also cover nearby Leeds, Barnsley, and the wider Yorkshire region. Full Yorkshire coverage → · All solar services in Wakefield →
Inverter replacement in Wakefield — common questions
The headline price for a string inverter replacement in the Wakefield district is £795. That's a fixed, all-inclusive figure covering hardware, safe removal of the failed unit, installation of the replacement, commissioning, DNO G99 variation filing, and a written report. Upgrading to a hybrid at the same time — the sensible option if you're considering a battery down the line — runs from £995. Three-phase systems are priced individually from £1,200. Government scheme installs (Mark Group, HomeSun, and similar) typically used 2–4 kW Fronius or Solis inverters that we stock as standard. If you'd like to verify the fault first, a £75 remote diagnostic gives you a definitive answer before spending on hardware.
Yes. Mark Group installed thousands of solar systems across the Wakefield district through government energy efficiency schemes before going into administration in 2015. Those systems are now over 10 years old and the inverters are reaching end of life. We replace inverters on former Mark Group installs every week. Your manufacturer warranty on the inverter hardware is separate from the installer — it may still be valid. Full Mark Group guide →
It depends on whether you plan to add battery storage. If you have a FiT system and want to add a battery to store surplus generation rather than exporting it, a hybrid inverter replacement from £995 makes sense — it handles both solar input and battery management in one unit. If you just want to restore generation with no plans for a battery, a like-for-like string inverter replacement at £795 is the simpler and cheaper option. A diagnostic includes a recommendation on which approach suits your setup and tariff.
Wakefield is practically on our doorstep — about 25 minutes down the road — so it's one of the fastest areas we serve. Most Wakefield replacements are scheduled within two to four working days of quote approval, assuming the hardware is in stock (common Fronius and Solis models usually are). The on-site work runs about half a day: isolate, remove, mount the new unit, wire, commission, and verify output. Want to check the diagnosis first? A £75 remote diagnostic delivers a written fault report the same day.
Inverter failed in Wakefield? Get a replacement quote.
Let us know what the inverter is doing — or not doing — and we'll take it from there. A photo of the unit label speeds things up, but a brand and model number works fine too. We'll confirm the replacement spec, check if a hybrid upgrade makes sense for your tariff, and send a fixed-price quote. Wakefield district postcodes get our fastest turnaround.