Solar Panel System Calculator
Calculate solar panel requirements, energy production, and system costs for your home
About this calculator
This Solar Panel System Calculator helps homeowners determine the optimal solar panel setup for their property by analyzing energy consumption, roof space, and local solar conditions. It calculates the number of panels needed, expected energy production, potential savings, and total system costs including installation. This tool enables informed decision-making about solar investments by providing personalized estimates based on your specific location, energy usage patterns, and budget requirements.
How to use
Enter your monthly electricity bill amount or average kWh usage, select your location for solar irradiance data, and input available roof space. Specify your preferred panel type and system size preferences. The calculator will generate comprehensive results showing panel quantity needed, annual energy production, cost estimates, and payback period for your custom solar installation.
Frequently asked questions
How accurate are the solar production estimates?
Estimates are based on NREL solar data and typical system performance, providing 85-95% accuracy for planning purposes, though actual results may vary with weather and installation specifics.
What factors affect solar panel system costs?
System costs depend on panel type, installation complexity, local labor rates, permits, inverter selection, and available tax incentives or rebates in your area.
How much roof space do I need for solar panels?
Typically 100 square feet per kW of solar capacity. A standard 6kW residential system requires approximately 400-600 square feet of suitable south-facing roof space.