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Understand solar installation, roof performance, export tariffs and what a system could save in a UK home.
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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.
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.
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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