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.
Search all 61 guides, or browse topics and pages below.
The archive
Showing 49–60 of 61
Peer-reviewed analysis of 1.5 million UK property transactions proves solar panels add a 6.1% to 7.1% premium — £14,000 to £16,000 on a typical home. This guide covers the Swansea University study, RICS valuation rules, EPC band shifts, SEG export rates, the rent-a-roof history, and what HEM means for solar-equipped homes from 2027.
The Future Homes Standard lands on 24 March 2028 — and its revised carbon rules can force a planning-compliant extension into an outright building control failure if you exceed 25% glazing and keep your gas boiler. This guide corrects the most widely misquoted U-values, explains the compliance maths, and shows how a heat pump eliminates the problem entirely.
The UK government has allocated £1.7 billion for zero and low-interest loans to fund solar panels, battery storage, and heat pumps — but the English scheme doesn't launch until April 2027. This guide covers what's available right now in Scotland and Wales, what E.ON and Octopus offer today, and how to build a cash-flow model that makes solar immediately cost-neutral.
With 1.8 million fixed-rate mortgages expiring in 2026 and the Bank of England holding at 3.75%, UK homeowners are using green remortgages and 0% additional borrowing to fund solar panels and heat pumps. This guide breaks down every major lender's cashback, rate discount, and retrofit borrowing product for Q2 2026.
The legal PDR noise limit is 42 dB(A) at your neighbour's window — but the quietest models on the market now operate at 32 dB(A), quieter than a library. Verified manufacturer specs, Quiet Mark rankings, real-world acoustic physics, and the £9,000 grant that makes a premium quiet unit financially viable.
The Warm Homes Local Grant offers up to £30,000 per household for solar panels, heat pumps, insulation, and battery storage — fully funded, no repayment required. This guide breaks down the three eligibility pathways, the income thresholds, what the grant actually covers, and exactly how to apply before your council funding runs out.
The UK government now offers a £2,500 air to air heat pump grant under the Boiler Upgrade Scheme — but only for homes replacing direct electric heating. Full eligibility rules, net costs after grant, planning requirements, and how MCS-certified installers claim the subsidy on your behalf.
Plug-in solar panels are now legal on UK ring mains following the April 2026 BS 7671 Amendment 4. No electrician required for sub-800W systems. Regional savings data, £400 kit vs. £7,000 rooftop cost comparison, safety certification checklist, and exactly who benefits.
April 2026: The Ofgem price cap drops 7% to £1,641, but analysts are forecasting a 20% spike by July. Full breakdown of heat pump grants, Tesla's VPP launch, record UK solar output, and what to do before the window closes.
Tesla has secured its UK electricity supply licence. Discover how Tesla Electric UK and the Powerwall 3 Virtual Power Plant will slash your energy bills in 2026 — and why the £750 rebate window is closing fast.
A no-spin account of fitting a heat pump in a 1960s terrace. Hot water cylinder logistics, microbore pipework replacement, and a real-world winter COP of 2.44 documented.
A Bristol home's real January electricity bill with a Tesla Powerwall 3. Import/export data, Octopus Flux earnings, and what winter solar actually delivers.
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.
Ready for advice specific to your home?
Compare quotes from local MCS-certified installers, free and without obligation.
Get free local quotes →