Going solar is one of the most impactful financial and environmental decisions a homeowner can make. But the solar market is complex, full of sales pressure, and easy to get wrong. Here's everything you need to know before signing anything.
How Much Do Solar Panels Cost?
The average U.S. residential solar installation costs $15,000–$25,000 before incentives, depending on system size, location, and installer. A typical 6kW system runs about $18,000 before the federal tax credit.
After the 30% federal Residential Clean Energy Credit, a $18,000 system costs $12,600 out of pocket. Many states add additional rebates on top, and some utilities offer cash-back incentives.
The 30% Federal Tax Credit
The Inflation Reduction Act extended the solar investment tax credit (ITC) at 30% through 2032. This is a dollar-for-dollar reduction in your federal income tax bill — not a deduction. There's no income cap, but you do need to owe enough federal taxes to use it. If you don't use it all in one year, you can carry it forward.
The credit applies to panels, inverters, mounting hardware, and installation labor. It also applies to battery storage added at the same time.
How Much Can You Save?
The average 6kW system in the U.S. generates about 7,000–9,000 kWh per year, offsetting 60–100% of a typical home's electricity use. At the national average electricity rate of ~13¢/kWh, that's $900–1,200/year in savings — more in high-rate states like California ($0.25+/kWh) or Hawaii.
Use our Solar Panel Savings Calculator to estimate your specific savings based on location and system size.
Is Your Roof Ready?
Before getting quotes, check your roof's age, condition, and orientation:
- Age: If your roof is over 15 years old, consider replacing it before going solar. Removing and reinstalling panels for a roof replacement can cost $3,000–5,000 extra.
- Orientation: South-facing roofs at a 30° pitch are optimal. East/west-facing panels produce 10–20% less; north-facing is not recommended.
- Shading: Even partial shading from trees or chimneys significantly reduces output. Microinverters or power optimizers mitigate this.
- Structural integrity: Your roof must be able to support ~3–4 lbs per sq ft of additional load.
Choosing an Installer
This is where most homeowners make mistakes. The solar industry has a significant number of aggressive or unscrupulous installers. Here's how to choose well:
- Get at least 3 quotes — prices can vary by 20–30% for the same system
- Check for NABCEP certification (the gold standard for solar installers)
- Read Google and BBB reviews carefully
- Avoid high-pressure tactics or "today only" deals
- Ask whether they subcontract the installation (many large companies do)
Buying vs Leasing vs PPA
Buying outright (cash or loan) gives you full ownership, all the tax credits, and maximum long-term savings. Solar leases and PPAs (power purchase agreements) let you go solar with no upfront cost but the installer keeps the tax credits and profits from energy production. They're appealing but generally deliver less long-term value.
If you can't afford to buy, a solar loan is usually better than a lease. Look for low-interest green energy loans through your bank, credit union, or state clean energy programs.
What Payback Period Should You Expect?
The average solar payback period in the U.S. is 6–10 years after incentives. In high-sun, high-rate states (CA, AZ, HI, MA), it can be as low as 4–6 years. In low-sun states with lower rates (PNW, Midwest), 10–12 years is typical.
Given that quality solar panels come with 25-year performance warranties, even a 12-year payback leaves you with 13+ years of pure profit. Use our Solar ROI Calculator to model your specific scenario.