Question 1

How many solar panels do I need to charge an EV?

Accepted Answer

It depends on your location and how much you drive. A typical EV driving 35 miles/day uses about 250-350 kWh/month for charging. In a sunny state like California or Texas, a 4-6 kW solar system (12-18 panels) can fully cover this. In less sunny states like the Pacific Northwest, you may need 6-10 kW. Use this calculator with your exact location for a precise answer.

Question 2

What is the federal solar tax credit (ITC)?

Accepted Answer

The federal Investment Tax Credit (ITC) provides a 30% tax credit on the full cost of a residential solar installation. For a $24,000 system, you would receive a $7,200 credit against your federal income taxes, reducing your net cost to $16,800. The 30% rate is guaranteed through 2032.

Question 3

How accurate is this solar estimate?

Accepted Answer

Solar production estimates use NREL's PVWatts API (v8), which is the industry standard tool used by solar installers, utilities, and researchers. It uses 30 years of historical weather data for your location. Actual production will vary ±10-15% based on shading, panel orientation, soiling, and equipment degradation.

Question 4

What is the payback period for solar panels used to charge an EV?

Accepted Answer

The payback period shown is calculated using only EV charging savings. In reality, solar also offsets your home electricity use, significantly shortening the actual payback. Most US homeowners see payback in 5-10 years when accounting for all savings. In high-rate states like California, Hawaii, and Connecticut, payback can be 4-6 years.

Solar + EV Charging Calculator

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