Tool 02 · Panels
How many solar panels do I need?
Turn monthly electricity use into system size, panel count and rough roof area. Built for the exact search homeowners type before they ask for quotes.
Inputsusage + panel watts
Outputpanels + roof area
Privacy100% client-side
What changes the answer?
Panel count is not magic: annual kWh ÷ expected production per kW ÷ panel wattage. Shading, roof direction, tilt and local weather can move the answer a lot.
Use this for first-pass sizing, then confirm state sun with the sun look-up and quote quality with the quote scorecard.