Solar for Electric Cars — EV Charging at Home
Published 2026-02-20 · Updated 2026-07-07 · MySunROI Research Team
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An EV adding 12,000 miles/year uses ~3,600 kWh — roughly 2.5–3 kW of additional solar. Charging at home on solar beats public fast-charging costs long-term.
Sizing solar for EV
- 12,000 mi/yr ≈ 3,600 kWh ≈ +2.5 kW solar
- Two EVs: double the addition
- EV charger guide
Charging cost comparison
Home grid charging: ~$0.15–$0.25/kWh. Solar marginal cost after payback: near $0.
Solar costs by state
Frequently Asked Questions
Can I charge EV at night from solar?
Yes with a battery, or use TOU grid rates at night if solar covers daytime load.