Solar + EV Calculator
Estimate how solar panels can offset your EV charging costs and home electricity bill.
Data last updated: March 2026
Pairing solar panels with an EV is one of the best financial moves for EV owners. A typical 7 kW system produces enough energy to cover all EV charging for an average driver and still offset a large portion of your home electricity. With the 30% federal tax credit, most solar systems pay for themselves in 6-10 years and then generate free electricity for another 15-19 years.
60 kWh battery • 272 mi EPA range • 25 kWh/100mi
1600 kWh/kW/yr solar production • 27.57¢/kWh electricity
Total system cost before tax credits
Your home electricity bill before adding EV charging
Your Solar + EV Savings
Solar Coverage of EV Charging
Your solar system produces more than enough to cover all EV charging. The surplus ($2,207/yr value) offsets your home electric bill.
Monthly Cost Comparison
How the Solar + EV Calculation Works
This calculator estimates annual solar energy production based on your system size and state. Sunny states like Arizona and Nevada produce roughly 1,600 kWh per installed kW per year, while cloudier states like Washington and Michigan produce around 1,000 kWh/kW/yr. Most states fall in the middle at about 1,300 kWh/kW/yr. Your EV's energy consumption is calculated from its EPA-rated efficiency and your daily driving distance.
Why Solar and EVs Are Better Together
Solar panels alone offset your home electricity bill, which provides moderate savings. Adding an EV dramatically increases your electricity consumption, which means more of your solar production displaces expensive grid power. This synergy makes both investments pay off faster. A homeowner who installs solar before buying an EV may see a 10-year payback. That same homeowner with an EV could see a 7-year payback because the savings per year are higher.
Net Metering Makes It Work
Most EV owners charge overnight, but solar panels produce during the day. Net metering bridges this gap: your solar system exports excess power to the grid during the day, and you receive credits that offset the electricity you draw at night for EV charging. The grid acts as a free battery. However, net metering policies vary by state and utility. Some states offer full retail credit, while others offer reduced rates. Check with your utility for specific terms.
The 30% Federal Tax Credit
The Inflation Reduction Act extended the Investment Tax Credit (ITC) at 30% through 2032. This applies to the full cost of a residential solar installation, including equipment, labor, and permitting. For a $20,000 system, that is $6,000 off your federal tax bill. The credit steps down to 26% in 2033 and 22% in 2034. Some states offer additional incentives on top of the federal credit.
Frequently Asked Questions
In most cases, yes. A typical 7 kW solar system produces 9,100-11,200 kWh per year, while the average EV driven 35 miles per day needs roughly 3,200 kWh annually. The surplus offsets your home electricity bill too. In cloudier states you may need a larger system or will cover a smaller share.
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