what plug-in solar could generate for any address in Britain (opens in new tab)

Tariff . Solar-weighted import rate . Annual savings . Lifetime savings (20 years, net of capex) . Savings come from the power you use yourself: most plug-in kits can't claim the Smart Export Guarantee (it needs an MCS install), so exported energy is assumed to earn nothing. Self-consumption defaults to 60% (spec §3.7). Time-of-use tariffs use a typical-day model. Refresh quarterly.