Question 1

How many solar panels do I need for my house?

Accepted Answer

A typical 4-bedroom US home uses ~10,000 kWh per year, which requires an 8-10 kW solar system, or about 16-22 panels at 400W each. The exact number depends on your electricity bill, location, roof orientation, shading, and panel efficiency. The tool above estimates this for you.

Question 2

How long do solar panels take to pay for themselves?

Accepted Answer

Most US homes pay back their solar investment in 6-12 years. After payback, electricity is essentially free for the remaining 15-20+ years of panel life. Areas with high electricity rates (CA, NY, HI) and good sun (AZ, NV, FL, TX) see the fastest payback. Federal tax credit (30% ITC) significantly shortens the payback period.

Question 3

How much do solar panels cost in 2026?

Accepted Answer

As of 2026, the average installed cost of residential solar in the US is $2.50-$3.50 per watt before incentives, or roughly $20,000-$30,000 for a typical 8 kW system. After the 30% federal Investment Tax Credit, net cost drops to $14,000-$21,000. Pricing continues to decline year over year.

Question 4

Is solar worth it for my house?

Accepted Answer

Solar is generally worth it if you have a suitable roof (south-facing, minimal shade, in good condition), own your home, live in a high-electricity-rate state, and plan to stay 5+ years. Use this calculator to see your 25-year ROI. If payback is under 10 years and lifetime savings exceed $20,000, it's typically a good investment.

25-Year Cumulative Savings