Sizing A Solar Panel System For A Residential Roof

A 5kw solar system may produce enough energy to power your home but you may not have enough roof space for a system of that size.

Sizing a solar panel system for a residential roof.

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. To get these numbers we used high and low panel production ratios to calculate how many solar panels are needed on average. Those solar panels used for residential purposes range from 150 watts to 370 watts per panel depending on the panel size efficiency and cell technology.

Let s look at the average california home. 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. Take these factors into account. 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. Small solar panels yet you can also find panels of 150 160 or 175 watts. The typical homeowner will need 28 34 solar panels to cover 100 of their energy usage dependent on location and roof size. How big are solar panels.