Solar Topper · Free EV tools
EV power & cost-per-mile calculator
How many kilowatt-hours does your electric car use per mile? What will it add to your home electric bill? Enter your driving and charging assumptions to estimate the cost.
EV charging and home solar planner
Choose a vehicle, edit your charging rates, and compare peak versus off-peak costs. No account or email needed.
Efficiencies are approximate illustrative presets, not official EPA ratings for a specific model year, trim, wheel size or conditions. Edit below to match your vehicle.
EV charging cost / mile
$0.08
Monthly EV charging
$77.92
Monthly added electricity
271 kWh
Annual added electricity
3,247 kWh
What if you changed charging time?
All off-peak
$64.94/mo
Your charging mix
$77.92/mo
All peak
$129.87/mo
Effective blended charging rate: $0.29/kWh. The comparison excludes any rate-plan fixed fee changes.
Gasoline comparison: $160.71/month. Estimated EV charging advantage: $82.79/month, excluding vehicle purchase, maintenance and other costs.
New solar? Your annual EV electricity need is one input to a whole-home design. Solar does not generate at night without stored daytime energy. The calculator does not assume every EV kWh can be offset at retail rates or estimate guaranteed solar savings.
Review my EV and solar estimateHow we calculate your EV charging cost
Driving electricity = miles ÷ EV efficiency (miles per kWh). Electricity drawn from your home = driving electricity ÷ (1 − charging losses). Monthly cost = home electricity drawn × your charging electricity rate. Cost per mile = monthly charging cost ÷ miles driven.
The estimated annual EV kWh helps you discuss the additional energy demand with a qualified solar installer. It is not itself a solar panel sizing or savings estimate, particularly for homeowners with NEM 1.0, NEM 2.0 or net billing.
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EV charging and solar guides · Solar for EV owners · Free electricity bill review