Solar + EV is the most powerful combination in home energy
An electric vehicle owner who pairs their car with rooftop solar effectively locks in a fuel price of near-zero for the life of the panels. The average US driver spends $1,400–$2,200/year on gas. A solar-charged EV can cut that to under $100 in electricity costs by year 10. Over a 25-year panel lifespan, the math is transformative.
Why EV owners need to re-size their solar system
Most solar installers size systems for your historical electricity usage — which doesn't include the EV you're about to buy, or bought last year. Adding an EV typically increases a home's electricity consumption by 30–50%. A system sized without accounting for EV charging will leave you relying on grid power for most of your driving, missing the biggest single savings opportunity in the solar+EV combo.
EV charging and time-of-use rates
If your utility has TOU pricing, when you charge matters as much as how much solar you have. Charging at midnight on an off-peak rate ($0.10/kWh) is far cheaper than charging at 7 pm on a peak rate ($0.40/kWh). Solar-charged EVs at midday is the holy grail — but even without midday charging, pairing solar export credits with off-peak overnight charging dramatically reduces your effective fuel cost.