Solar 101

Define Solar is here to help educate you on all things solar. Use the resources below to learn more about a variety of solar topics.

Visit our knowledge base for an in-depth look at exactly how solar works.

We’ve created a simple guide that visually shows you how solar panels work on your home.

Almost every home listed on Zillow is given a Sun Number™. Here’s how that score is calculated.

There are no shortage of questions when it comes to solar. We’re here to answer all of them.

Talk to Sonny, our Solar Guide

Sonny is our advanced solar expert, designed to discuss all things solar without you having to talk to a real person.