Determining the number of panels, or how big your solar system needs to be, is the next step in outfitting your home for solar energy. Consulting directly with the installation company will help you figure out exactly how many solar panels you need. But before your consultation, be sure to have this information on hand:. Solar companies offer different warranties on their products and services, but you can find some common themes among the most prominent companies. For example, most solar companies and vendors offer 25-year warranties for. Choosing a solar installation company also means researching and deciding on the type of solar panelsyou want to install. There are three main. Knowing the median household size in Los Angeles, which is 1,771 square feet, and the average amount of energy each home uses in California—542.
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