Learn how to determine your solar payback period and find out when your investment will start saving you money.

3 min read Solar energy is the technology used to harness ... rooftops, and handheld calculators. The cells are made of semiconductor materials like those found in computer chips.

and you can use an online calculator to estimate your annual savings by plugging in information like your location, energy usage and the current average price of solar panel installation in your area.

Answering “How much do solar panels cost?” is complicated because it’s not just one number. It depends on your energy usage, where you live, what incentives you qualify for and whether or ...