Should I insulate before solar?

Ideally both — but solar delivers bigger savings. If budget forces a choice: solar saves 3-5x more per year than insulation. Best: insulate first (cheap, quick), then solar.

Solar: Energy Saving Guide

By Home Solar Guide Team|Updated 18 March 2026|guide

Independently written | Evidence-based | Sources cited

Solar energy saving — Solar is the single biggest energy saving measure available to UK homeowners.

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How does solar compare to other energy saving measures?

Solar panels are the #1 energy saving measure for UK homes: Save £580-£1,100/year on electricity. Payback: 8-12 years, then FREE for 15+ more years. Compare to other measures: loft insulation saves £100-£200/yr, LED lighting saves £50-£100/yr, double glazing saves £100-£200/yr, smart thermostat saves £50-£150/yr. SOLAR saves £580-£1,100/yr — more than ALL other measures combined. Plus: 0% VAT, SEG income, property value increase, and carbon reduction. Solar is the foundation of any home energy saving strategy.