Every Battery Compared: 2026

Which solar battery is best value in the UK?

Every major solar battery available in the UK, compared on key metrics: BEST VALUE: GivEnergy 9.5kWh — £4,500-£5,500 installed. LFP chemistry. 12,000 cycles. 10yr warranty at 60%. UK market leader (~40% share). Best app. PREMIUM: Tesla Powerwall 3 — 13.5kWh, £8,000-£10,000. NMC chemistry. Unlimited cycles warranty. 10yr at 70%. Best design. MODULAR: BYD HVM/HVS — 2.76-22.08kWh modular. £4,000-£7,000. LFP. 10yr warranty. Works with SMA/Fronius. BUDGET: Pylon Tech US3000C — stackable 3.55kWh modules. £3,500-£5,000. LFP. 10yr warranty. INTEGRATED: Fox ESS ECS — £3,500-£5,000 for inverter + battery combo. LFP. 10yr. COST PER GUARANTEED kWh THROUGHPUT: GivEnergy: 3.9p/kWh (£4,500 ÷ 114,000 kWh lifetime). Pylon Tech: 4.1p/kWh. Fox ESS: 4.3p/kWh. BYD: 4.5p/kWh. Tesla: 5.8p/kWh. VALUE RANKING: (1) GivEnergy, (2) Pylon Tech, (3) Fox ESS, (4) BYD, (5) Tesla. Sources: Manufacturer specifications (2026 models), UK installer pricing surveys, MCS product directory.