Solar Cost-Benefit Analysis 2026
What is the cost-benefit of solar panels?
Complete 25-year cost-benefit for a 4kW UK solar system: TOTAL COSTS: Installation £6,750 + inverter replacement £1,000 + maintenance £800 = £8,550. TOTAL BENEFITS: Electricity savings £12,540 + SEG income £1,960 + property value increase £2,500 = £17,000. NET BENEFIT: +£8,450 (99% ROI). With battery + smart tariff: net benefit increases to +£12,000-£19,000+ (140-220% ROI). Every credible analysis reaches the same conclusion: solar is one of the best financial decisions for UK homeowners.
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