How Much Electricity Saved?

How much electricity do solar panels save?

A 4kW solar system saves 2,000-3,200 kWh of grid electricity per year: WITHOUT BATTERY: 2,000 kWh saved (50% self-consumption × 4,000 kWh generated). At 24.5p/kWh: £490 saved on grid imports. WITH BATTERY: 3,200 kWh saved (80% self-consumption). At 24.5p/kWh: £784 saved. Average UK home uses ~3,700 kWh/year. So solar replaces 54-86% of grid electricity with free solar. The remaining 14-46% comes from the grid — mainly winter evenings.