altE is the #1 online source for solar and battery storage systems, parts and education.

Solar panel kits are the best way to DIY a complete solar power system for a home, cabin or tiny house. Pre-designed & custom solar panel system kits available.

Explore a wide range of products at AltE Store.

Solar panels are a proven and reliable way to produce clean electricity where it’s needed – on a home, RV, boat, farm, or anywhere else that receives at least moderate sunlight. altE has been a trusted solar panel retailer since 1999 with competitive prices on high quality brands. At altE, we offer solar panels for sal

Prevent solar battery overcharge with a charge controller from altE. Shop a wide range of charge controllers, battery regulators and charge regulators.

DIY solar power and renewable energy resources: Articles, videos, calculators, and tools for off-grid solar, grid-tied solar, and battery backup systems.

Free DIY off grid solar with storage system resources: buying guides, videos, articles, calculators & tools from the altE renewable energy resource library.

Using a hybrid inverter with your solar panels is a great way to help keep the power going when you need it most. Hybrid Inverters are ideal for grid-uncertain situations. A hybrid inverter is primarily used for grid-tie purposes and selling back to the utility company, but they can also provide backup power to your ho

We couldn't access your cookies, please click the tab again to approve access. (why?)Explore all products at AltE Store.

A table of the high, low, and average solar insolation measurements for many large cities in the United States.