Roughly one in five new cars sold worldwide is now electric. When you charge one from your own roof, the fuel is close to free. Here's the trend, and how to plan for it.
Full-year 2025[1]
Volume-weighted averages, 2025[2]
The IEA projects roughly 23 million electric car sales and close to a 30% global share in 2026.[1]
A typical EV travels about 3–4 miles per kWh. At the recent US average residential rate of roughly 18¢/kWh[3] that is about 4.5–6¢ per mile from the grid, and less from your own roof once the system is paid off. Compare it against your own car's cost per mile rather than trusting a headline number.
Solar over-produces at midday when many cars sit idle at home. Daytime charging turns "exported for pennies" power into "fuel worth dollars."
Bidirectional (V2H/V2G) EVs can power your house during an outage or the evening peak, a growing capability worth planning for.
Even if you're not driving electric yet, adding a couple of extra panels now is far cheaper than a second install later. We'll walk you through future-proofing your array and picking an EV-ready charger.
Read the install guidePer-mile figures on this page are calculations from the sourced inputs shown, not quoted statistics. Last reviewed 24 July 2026.
