Sizing A Solar Panel System For A Residential Roof

To get these numbers we used high and low panel production ratios to calculate how many solar panels are needed on average.

Sizing a solar panel system for a residential roof.

If you have a small or odd shaped roof solar panel size is an important consideration when deciding on the size of a solar system. 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. With a large usable roof area you can buy more larger panels at a lower cost per panel to get to your target energy output. Because every house is different shading and roof slopes vary and because some families use more energy than others the number of solar panels your home needs is you specific.

Let s look at the average california home. An average solar panel is 65 x39 5 41 x3 25 or 17 5 square feet. How many solar panels do i need to power my house. Solar panels for households typically come in the standard dimensions of 1 70m x 1 00m that s around 1 7m2 for every panel installed however the wattage output w of the panels will likely vary between 250w and 360w for a more efficient module.

Take these factors into account. The typical homeowner will need 28 34 solar panels to cover 100 of their energy usage dependent on location and roof size. What is the minimum roof size for solar panels. How big are solar panels.