Home vs EV Battery

Should I use my EV as a home battery?

Home battery vs EV battery for solar storage: HOME BATTERY: 5-13.5kWh typical (GivEnergy, Tesla Powerwall). Cost: £4,000-£8,000. Available 24/7. Optimised for home solar. EV BATTERY: 50-80kWh (much larger). Cost: included in car price. Only available when car is home. Vehicle-to-Grid (V2G) could use your EV as a home battery. V2G STATUS (UK 2026): emerging — trials with Octopus/Nissan/BMW. Not mainstream yet. Technical challenges: battery degradation from extra cycling, compatible charger needed (£1,000-£2,000). RECOMMENDATION TODAY: get a dedicated home battery (always available, optimised for home use). V2G is a future bonus — when it arrives, your EV could supplement or replace a home battery. Don't wait for V2G — install a home battery now.