The homeowner research library
Clear-eyed guides to solar panels, heat pumps and home energy. Real numbers, policy explained, and the detail that matters before you commit.
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Think the solar panel payback period uk 2026 delivers is still 20 years? Discover how the 26p Ofgem cap and 0% VAT collapsed UK solar ROI to 6-9 years.
Discover why buying the most efficient solar panels in the UK could cost you thousands extra. Compare 2026 TOPCon vs Maxeon payback periods before you buy.
Compare solar diverters vs batteries for UK homes. Learn how a £400 immersion controller turns your hot water tank into an 11 kWh thermal store with a 2-year ROI.
Worried about a chimney or tree? Discover how modern microinverters make solar panels on a shaded roof efficient and profitable. Get your yield quote.
Think your roof faces the wrong way? Discover why east west solar panels UK installations outperform south-facing roofs on modern time-of-use tariffs.
Want a heat pump without hot water cylinder space? Discover how phase-change heat batteries replace combi boilers, fitting under a kitchen counter.
Should I leave my heat pump on all the time? Discover the counter-intuitive physics of weather compensation and why turning it off spikes your bills by 33%.
Boiler upgrade scheme EPC requirements changed in May 2024. Discover why your poorly insulated home now qualifies for the £7,500 heat pump grant without fabric upgrades.
Do I need bigger radiators for a heat pump? Discover the truth: 53% of UK homes need zero radiator changes, and only 7% need targeted Type 22 panel upgrades.
A heat pump with microbore pipes is widely called impossible. The maths says otherwise - and could save you £4,500 in unnecessary repiping. Here is the proof.
A 10 kWh battery on Octopus Go saves £450–£755 per year through overnight arbitrage. Full 2026 guide: which batteries to buy, installed costs, 0% VAT deadline (March 2027), honest 6–9 year payback numbers, and why GivEnergy's April 2026 administration matters.
At Q3 2026 Ofgem rates, a heat pump at SCOP 3.2 delivers useful heat at 8.2p/kWh — virtually identical to a 90% gas boiler at 8.1p. Switch to a dedicated heat pump tariff and the 15-year saving exceeds £8,700. Full cost breakdown, BUS grant explained, 3-scenario TCO model, and the HEM Band D trap waiting for gas boiler owners in 2027.
Independent-minded guidance
Written by Mark Anthony Haines, with over a decade in UK renewable energy. We work from published policy, industry data and real-world performance, and explain the assumptions behind the numbers.
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