Calculators
Last reviewed: October 26, 2026 · By the Borizo Editorial Team
Plug-in solar calculators
Estimate what a plug-in solar kit could save you, using your own numbers.
Our calculators run in your browser and explain every assumption they make. They give estimates, not guarantees: your results depend on your location, roof or balcony, and electricity rate.
Our calculators
Savings & payback
Yearly savings and payback time from kit price, wattage, sun hours and your electricity rate. Live now: open the calculator.
Kit size
How many panels you would need to cover part of your daily electricity use. Live now: open the calculator.
State rule checker
Pick your state and kit size to see the size limit, certification and utility or landlord rules, with a link to the official law. Live now: open the checker.
Estimates only. Calculator results are not financial, legal or electrical advice.