Determining Solar Panel Size

The exact number changes depending on the specifications of the chosen panel model as well as the sunshine available at the project site.

Determining solar panel size.

Before you begin to size a solar system follow these steps to determine your home s average electricity consumption and pv needs. The size available needs to be divided by the size of the solar panel that is going to be used. Calculate your kwh usage gather the kilowatt hours kwh usage from your electric bill. You ll want to have full 12.

The average size of solar panels used in a rooftop solar installation is approximately 65 inches by 39 inches or 5 4 feet by 3 25 feet. There is some variation from brand to brand and if you re installing a large scale solar panel system such as for a warehouse or a municipal building your panels will be closer to 6 feet long. Sunpower panels are 61 3 inches by 41 2 inches. Look up your peak sun hours average peak sun.

In our solar panel size guide we will highlight everything you should know about your solar panel sizing and possible power output. Orientation plays an important role especially if the roof size is small or not of a usable geometric shape. A home that consumes 1 000 kwh per month will normally need between 20 and 30 solar panels.