How Many Solar Panels Does A Family Need

An average homeowner needs 28 to 34 solar panels to fully offset their electricity bill with solar.

How many solar panels does a family need.

Take your system size and divide by the panel wattage to figure out how many solar panels you need in your system. The average american home needs 14 36 solar panels to power their home. 5959w 335w 17 78 panels round up the final number since you can t buy partial panels. How many hours of daily sunlight does your state receive.

If you live in a sunnier state less solar panels are needed to generate the electricity your home needs. A 5kw solar system which consists of 20 panels can produce an average of 7 000 kwh per year. Based on the example above if this household wants solar panels to cover just 70 of their home s electricity usage they d only need 6 solar panels 11 1 35 x 0 7. In this scenario we would need 18 panels rated at 335 watts apiece to cover our energy needs.

A 10kw solar system which consists of 40 panels can produce an average of 14 000 kwh per year. More efficient solar panels means less solar panels are needed. The number of panels you need for your house depends on factors like location and panel performance. You will need a roof space of about 340 sq ft for a 5kw system.

If you only want your solar panels to subsidise part of your home s electricity usage you can install a smaller number of solar panels. The exact number changes depending on the specifications of the chosen panel model as well as the sunshine available at the project site.