Solar Panels for Self-Sufficiency

How self-sufficient can solar make you?

Realistic UK solar self-sufficiency: Solar only (no battery): 30-50% of electricity self-generated. Solar + battery: 70-85%. Solar + battery + smart tariff (Octopus Go): 85-95% (remaining imports are very cheap at 7.5p). Full off-grid (100%): requires 8-10kW panels + 20-30kWh battery + generator. Cost: £15,000-£40,000. For most homes: 70-85% with solar + battery at £9,000-£14,000 is the sweet spot — maximum comfort at reasonable cost.