The strike price for solar in the UK’s latest renewable energy auction has been held at £75 per megawatt-hour. That is the same figure set in Allocation Round 7, and it represents a 30% drop from the £110/MWh ceiling used in earlier rounds. For the 14 million UK households who heat and power their homes with grid electricity, the number matters — but not in the way you might think.
As reported by Solar Power Portal, the Contracts for Difference (CfD) strike price applies to projects larger than 5 MW — solar farms covering several football fields, not the 4 kW array on your neighbour’s semi-detached roof. The £75 figure is the price at which the government guarantees to buy the electricity, topping up or clipping payments depending on wholesale market movements.
What the strike price means for your bill
Every CfD project reduces wholesale price volatility for large generators, and that feeds through to household bills. Ofgem estimates that the CfD scheme has shaved roughly £30 a year off the average dual-fuel bill since 2015, by locking in low-cost renewables. But the direct link between a £75 strike price and your monthly direct debit is thin. The real action for homeowners is elsewhere.
The Smart Export Guarantee (SEG) — which replaced the Feed-in Tariff in 2020 — pays households for surplus solar electricity they export to the grid. Typical SEG rates range from 4p to 15p per kWh, depending on your supplier. Octopus Energy’s outgoing tariff pays 15p/kWh; EDF offers 5p. With a 4 kW system generating roughly 3,500 kWh a year, a 10p SEG rate adds about £350 annually to the household income. That is a fraction of the CfD strike price, but it is the relevant metric for rooftop solar owners.
Who qualifies — and who doesn’t
The AR8 auction, which opened on 27 March 2025, is open to solar projects of all sizes above 5 MW. Community energy schemes and large commercial rooftops can bid, but individual households cannot. The government has resisted calls to extend CfDs to sub-5 MW projects, arguing that smaller installations are better served by SEG and the falling cost of panels.
Yet the gap between CfD support and household economics is narrowing. Solar panel prices have fallen by roughly 40% since 2020, according to the Energy Saving Trust. A typical 4 kW installation now costs between £5,000 and £7,000, down from £8,000–£10,000 five years ago. With electricity prices stuck above 24p/kWh under the current price cap, the payback period for a south-facing roof in southern England is around 8 years — before any export income.
The catch: grid capacity and planning
But… the fixed £75 strike price tells only part of the story. Solar Power Portal notes that the government has allocated 1.5 GW of solar capacity in AR8, down from 2.2 GW in AR7. Developers are pulling bids because grid connection queues stretch to 2030 and planning permission can take 18 months. For homeowners, this matters because fewer large solar farms mean less downward pressure on wholesale prices — and potentially higher standing charges as grid costs are spread across fewer renewable generators.
Ofgem’s latest grid connection reform, announced in February 2025, aims to clear the backlog by 2027. But the regulator has not yet published a timeline for when new connection offers will be made. The catch is that while rooftop solar avoids grid bottlenecks by generating behind the meter, the wider decarbonisation of the grid still depends on those large projects getting built.
For the homeowner reading this, the £75 strike price is a signal of stability — not a game-changer. The government is betting that solar costs will stay low enough to deliver cheap power without raising subsidies. The immediate question is whether your own roof is ready. With EPC improvements of 3–5 bands and a payback period that now competes with the stock market, the case for installing solar has never been purely about the subsidy. It is about locking in a generation of free electricity before the next price cap rise hits.
Households interested in solar should check the Energy Saving Trust’s solar calculator for their postcode and compare SEG rates on the Ofgem website. Installations completed before 31 March 2026 will qualify for the 0% VAT rate on solar panels and batteries, a saving of £1,000–£1,500 on a typical system. The next CfD auction, AR9, is expected in 2026 — but don’t wait for it. The economics already work now.
Frequently Asked Questions
No. The Contracts for Difference strike price applies only to large solar farms over 5 MW. Households are paid under the Smart Export Guarantee (SEG), which is set by individual energy suppliers. Typical SEG rates are 4–15p/kWh, far below the CfD price.
Not directly. The auction sets the price for large-scale projects, not retail panel costs. However, stable CfD prices encourage manufacturers to scale up production, which has helped drive a 40% drop in panel costs since 2020. That trend benefits homeowners indirectly.
