Frequently Asked Questions About Solar Panels

The average cost of solar panels in the US is $2.77 per watt before incentives. For a typical 8 kW home system, this means about $22,160 before the 30% federal tax credit, or approximately $15,512 after the credit. Actual costs vary by state, roof type, and system size. Use our solar calculator for a personalized estimate.

Most solar panels are warranted for 25 years and can continue producing electricity for 30-35 years or more. Panels typically degrade at about 0.5% per year, meaning after 25 years they’ll still produce around 87% of their original output. Learn more in our solar panel lifespan guide .

Yes, solar panels still generate electricity on cloudy days, though at reduced efficiency. On overcast days, panels typically produce 10-25% of their rated capacity. Even cities with lots of cloudy weather (like Seattle or Portland) get enough sunlight to make solar worthwhile. Check our solar performance guide for more details.

The federal solar Investment Tax Credit (ITC) allows you to deduct 30% of the total cost of your solar installation from your federal income taxes. For a $22,000 system, this means a $6,600 tax savings. The 30% rate is available through 2032, then steps down to 26% in 2033 and 22% in 2034. Read our complete tax credit guide for more details.

While it’s technically possible to install solar panels yourself, we recommend professional installation for most homeowners. DIY solar requires electrical knowledge, roof work, and navigating permits. Professional installation ensures your system is safe, code-compliant, and eligible for all warranties and incentives. Learn more in our DIY solar panels guide .