Home battery storage cost (UK 2026)

Home battery storage cost (UK 2026). The published installed range in 2026 is £700 to £1,050 per kWh installed (Solar Energy UK publisher), or £3,500 to £5,250 for a 5 kWh system AC-coupled to existing PV. Both ends of that range are stated rather than collapsed to a midpoint, because the spread reflects real differences in scope, access and grant eligibility rather than installer mark-up.

• AC-coupled retrofit vs DC-coupled new-build.
• Cell chemistry: LFP is the 2026 default for residential.
• Tariff strategy: Octopus Cosy or Agile give the battery something to do.
• above 0% VAT applies until 31 March 2027 (extended in 2024 to include standalone batteries).

Renewables, paired with PV at design stage.