Solar ROI Calculator
Estimate payback, lifetime savings, and return on investment using production, incentives, utility rates, and maintenance assumptions.
Open calculatorRun focused solar planning calculations with clear assumptions, safe input validation, and shareable results.
Estimate payback, lifetime savings, and return on investment using production, incentives, utility rates, and maintenance assumptions.
Open calculatorEstimate battery storage capacity for critical loads, backup runtime, reserve margin, and usable depth of discharge.
Open calculatorEstimate solar system size, panel count, and roof area needs from monthly usage, sun hours, panel wattage, and losses.
Open calculatorEstimate monthly, daily, and annual electricity demand from utility bills and major household load categories.
Open calculatorUse the tools in the same order a good solar proposal should be checked: understand consumption first, estimate panel count next, test payback after costs, and add battery sizing only if backup power matters.
Build a realistic monthly and daily kWh baseline from your bill and major home loads.
Start hereTurn that usage baseline into a rough system size, panel count, and roof-area check.
Then size panelsCompare net cost, incentives, annual savings, payback period, and long-term ROI.
Then test paybackAdd storage planning if you want backup power for critical loads during outages.
Add backup planningThese answers explain how to use calculator results as a planning baseline before comparing installer quotes.
Start with the energy consumption calculator if you are unsure how much electricity your home uses. That gives you a cleaner monthly and daily kWh baseline before you estimate panels, batteries, or payback.
A solar calculator gives a planning estimate from the inputs you provide. It is useful for comparing scenarios before quotes, but installer proposals can change after a roof survey, utility review, and equipment selection.
Panel count depends on your energy use, peak sun hours, panel wattage, roof area, shading, and system losses. The panel estimator connects those assumptions so you can see why one home may need more panels than another.
Use the battery sizer when backup power matters. Solar panel sizing estimates energy production, while battery sizing estimates usable storage for critical loads during outages.