Find the Right Solar System for Your Needs
Answer a few simple questions. We'll estimate the solar panels, inverter and battery capacity you may need.
Where will your solar system be installed?
Solar availability varies by location.
What type of solar system do you need?
Reduce your electricity bill while staying connected to the grid.
How much electricity do you use?
Choose the simple option if you already know your total load.
Don't know your total load? Switch to Detailed mode and add your appliances.
Solar sizing is an initial estimate. Final panel, inverter, battery and installation requirements should be confirmed through a professional site assessment.
How Our Solar Sizing Calculator Works
Select your state and choose the type of solar system you want. You can then use Quick mode if you already know your total electrical load, or Detailed mode if you want to calculate your requirement from individual appliances.
The calculator uses your location and estimated energy requirement to recommend a suitable solar system size. Depending on your selected system, it can estimate the required solar panels, inverter and battery capacity. For a bill-savings estimate on a specific system size, try our Solar ROI Calculator.
Which Solar System Is Right For You?
On-Grid Solar
Best when you have a reliable electricity grid connection and mainly want to reduce your electricity bill.
Off-Grid Solar
Designed for locations without a reliable grid connection. Solar and batteries provide your electricity.
Hybrid Solar
Combines solar, battery storage and the grid to provide both savings and backup power.
Frequently Asked Questions
This calculator provides an initial solar sizing estimate. Actual system requirements may vary based on roof conditions, shading, appliance characteristics, weather, battery technology and site-specific electrical requirements. A professional site assessment is recommended before installation.