Plan your solar setup the way an engineer would — with real numbers.
Twelve free calculators built from eight years of hands-on solar troubleshooting. Size your system, estimate savings, and check payback — without the jargon.
Why Use Our Calculators
Choosing, sizing, and pricing a solar system involves a lot of guesswork — until you run the actual numbers. Each calculator below was built around the questions we get asked most often on our YouTube channel: how big a system do I need, how fast will it pay for itself, and will my roof even work.
Pick the one that matches where you are in the process. No account, no email — just plug in your numbers and get a straight answer.
Getting Started
The essentials — start here if you’re just exploring whether solar makes sense for you.
Solar Savings Calculator
Estimate your monthly and yearly savings based on your current electricity bill and location.
Calculate Savings →Solar Size Calculator
Find the right system size in kW based on your household’s daily energy usage.
Calculate Size →Solar ROI Calculator
See your payback period and long-term return on investment before you buy.
Calculate ROI →Solar Load Calculator
Add up the appliances you run daily to get an accurate load profile for sizing.
Calculate Load →Advanced Planning
Dig deeper into production forecasts, environmental impact, and net metering credits.
Carbon Footprint Calculator
Calculate the CO2 emissions you’ll cut and what that’s equivalent to in everyday terms.
Calculate Impact →Solar Production Calculator
Forecast monthly and yearly energy output based on your location and system specs.
Calculate Production →Net Metering Calculator
Work out the credits you’ll earn from excess energy sold back to the grid.
Calculate Net Metering →Solar Shade Calculator
Check how nearby trees, walls, or buildings will affect your panel output through the day.
Check Shade Impact →Specialized Tools
For off-grid setups, backup power, irrigation, and structural roof checks.
Roof Suitability Calculator
Evaluate roof angle, direction, shading, and structural capacity for a solar install.
Analyze Roof →Battery Backup Calculator
Size the battery capacity you need for backup power and energy independence.
Size Battery →Off-Grid Solar Calculator
Design a complete off-grid system with battery backup and generator needs included.
Design Off-Grid →Solar Irrigation Calculator
Find the best solar irrigation setup for your farm and cut your energy costs.
Calculate Irrigation Cost →