East Anglia Solar Advantage
East Anglia receives 1,050-1,100 kWh/m² of solar irradiance annually — among the highest in the UK. Octopus Energy identified the region as Britain's "low-carbon capital" in 2026, with solar sales up 54% year-on-year. A typical 4kW system generates 3,400-3,600 kWh per year. At self-consumption rates of 35-50% (without battery) or 70-85% (with battery), annual savings range from £650-£1,200 for a 4kW system and £950-£1,500 for a 6kW system.
Savings by System Size
A 3kW system (8-10 panels) saves £450-£625/year with a 7-10 year payback. A 4kW system (10-14 panels) saves £650-£1,200/year with 6-10 year payback. A 5kW system (12-16 panels) saves £775-£1,325/year with 6-9 year payback. A 6kW system (16-20 panels) saves £950-£1,500/year with 6-8 year payback. Adding a battery increases self-consumption savings by £200-£500/year. Adding time-of-use tariff arbitrage adds a further £300-£600/year. Over a 25-year panel lifetime, total savings reach £20,000-£45,000 depending on system size and configuration.
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