Your specific energy needs will determine your solar panels’ size and wattage. Panels range from 200–400 watts per panel. In terms of the panel’s physical size, installers will choose panels that best fit your roof space. Larger homes can reduce the amount of required panels by using more efficient options such as mono. For example, a 60-cell panel with 21% efficiency would generate more power than a 72-cell panel with 16% efficiency. Reputable installers will ensure the selected solar panels work effectively for your home’s needs.