CLEAN ENERGY TOOLS

EV and Solar Calculators

Estimate home EV charging costs, compare gasoline and electric driving expenses, and calculate the simple payback period for a solar installation.

4 calculators User-entered energy prices Transparent charging and payback assumptions
Home Charging
$12.50
Solar Generation
32kWh
EV vs Gas
-60% Cost
Estimated Payback
7.5 Years

Which calculator should I use?

Cost to charge an EV

Use the EV Charging Cost Calculator.

Compare EV to gas savings

Use the Gas vs EV Cost Calculator.

Solar return on investment

Use the Solar Payback Calculator.

Compare charging speeds

Use the Level 1 vs Level 2 Calculator.

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EV & SOLAR QUESTIONS

EV & Solar FAQs

Find answers about EV charging costs, charging efficiency, Level 1 and Level 2 charging, solar payback, and important estimate limitations.

Learn how EV and solar estimates are calculated
How do I calculate the cost to charge an electric vehicle?
You need to know your EV's battery size (in kWh), the current charge level, the target charge level, and your residential electricity rate. The calculator multiplies the energy needed by your electricity rate to provide an estimated cost.
Is it cheaper to charge an EV at home or use public chargers?
Charging at home is almost always significantly cheaper than using public DC fast chargers. Home electricity rates typically range from 12 to 24 cents per kWh, while public fast chargers often cost between 30 and 50 cents per kWh.
What is a solar payback period?
The solar payback period is the amount of time it takes for your solar panel system to generate enough electricity savings to cover its initial installation cost. A typical payback period ranges from 5 to 10 years, depending on local energy costs and incentives.
What is the difference between Level 1 and Level 2 charging?
Level 1 uses a standard 120V household outlet and adds about 3-5 miles of range per hour. Level 2 requires a dedicated 240V circuit (like an electric dryer) and can add 15-40 miles of range per hour, making it ideal for overnight charging.
Looking for a question that is not covered here? Contact DataWisdom.

Transparent calculations and user-controlled assumptions

Formulas are shown clearly
Inputs remain user-controlled
Results are estimates, not guarantees
Limitations are explained on each calculator page