Solar + Battery Combo UK
Independently written
Is a solar + battery combo worth it?
Solar + battery combo costs and benefits: 4kW solar + 10kWh GivEnergy: £9,000-£11,500. 4kW solar + 13.5kWh Tesla Powerwall: £11,000-£15,500. Annual savings: £820 (GivEnergy) to £1,100+ (with Octopus Flux arbitrage). Self-consumption: 80% (vs 50% without battery). Payback: 11-14 years (standalone) or 9-12 (with smart tariff). 25-year net profit: £5,750-£14,000+. The battery's value comes from: evening self-consumption, tariff arbitrage, and VPP income — not just storing solar.
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