EV Charger Calculator

Solar EV charging calculator

Drive on

Estimate how many solar panels could cover your at-home EV charging and compare the energy cost with driving on gas.

A simple starting point: Your final solar design will also account for your roof, shading, utility rules, equipment, and household electricity use.
1Tell us how you charge
mi/yr
% home
All publicAll home
12,000 home miles · 3,000 public miles
$/kWh
Optional: adjust calculation assumptionsOpen to fine-tune rates, vehicle efficiency, and solar production.
$/kWh
mpg
$/gal
kWh/mi
kWh/kW
  • Solar panel size: 440 watts.
  • The EV electricity assumption is energy used per mile; change it if your vehicle provides a better figure.
  • The production assumption is intentionally conservative for a partially shaded Pacific Northwest system.
  • Home charging is treated as offset by solar through annual net metering; public charging is still paid separately.
  • Taxes, demand charges, rate changes, financing, system cost, and maintenance are not included.

Planning estimate

11 solar panels

to produce about as much energy annually as your at-home EV charging uses
4.84 kWEstimated array size
4,356Estimated kWh/year
1,145EV miles per panel/year

Your result at a glance

With your current inputs, 11 panels could produce roughly the annual electricity used for 12,000 miles of at-home EV charging. That solar energy may offset about $623 in home charging electricity each year, while public charging remains separate. Your actual system may need more or fewer panels after a site-specific solar design.

Your potential financial impact

These are estimated amounts you would spend or save each year on the energy used for driving. They do not include the cost of the vehicle or solar system.

Money you may keep each year vs. gas

$2,334/yr This is estimated money that could stay in your household budget instead of being spent on gasoline and charging.
Home charging electricity solar may offset$623/yr
Potential savings over five years$11,672

What you could spend each year

Driving a comparable gas vehicleEstimated spent on gasoline$2,885/yr
Charging the EV without solarEstimated home and public charging$1,173/yr
Total paid EV charging after home solarAt-home charging is treated as covered by solar; this is the only remaining paid public charging.$550/yr

Ready to see how solar could work for your home and your EV?

Book Your Free Site Survey

Planning estimates only, not a quote or production guarantee. Actual solar production and savings depend on the vehicle, charger efficiency, roof orientation, shading, weather, utility rates, net-metering rules, equipment, and driving habits. South Sound Solar serves western Washington from the coast to Cowlitz County.

HOME EV CHARGING & SOLAR POWER

Power Your Drive

With Solar From Your Home

Charging an electric vehicle at home can be simpler, more convenient, and more predictable than relying on public charging stations. When paired with solar, the energy produced on your roof can help cover the electricity used for everyday driving while reducing your dependence on gasoline and public chargers.

South Sound Solar designs solar and EV charging solutions for homes throughout Olympia and Western Washington. The right setup depends on how far you drive, where you charge, your vehicle’s efficiency, and how much solar energy your property can produce.

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