Free calculators to size your system, estimate savings, and understand the real numbers behind going solar. No signup. No ads. No sales pitch.
How many panels your home needs by usage and location.
Total savings over 25 years with rising rate projections.
When your solar investment breaks even.
Right battery capacity for backup and daily cycling.
Score your roof for solar: direction, pitch, shade, age.
Monthly credits from excess solar production.
Monthly payment vs electricity savings.
25-year cost comparison with rising rates.
CO2 savings with environmental equivalents.
Extra panels needed to power your electric vehicle.
PV cells, inverters, and net metering explained simply.
Read →System types, panel quality, installers, and red flags.
Read →How credits work and tips to maximize savings.
Read →Federal ITC, state programs, and SRECs explained.
Read →Every tool on this site runs entirely in your browser. No accounts, no tracking, no ads, and no solar company trying to get your phone number. Your data stays on your device.
We built these tools because the solar industry is full of inflated savings claims and high-pressure sales. These calculators give you the real numbers so you can make an informed decision on your terms.