Free Calculators for Self-Reliance
Plan your off-grid solar setup, size your battery bank, calculate water storage needs, and more. No signup required, no BS.
Calculator Categories
Popular Calculators
Battery Runtime Calculator
Calculate how long your battery will power your devices
Solar Charge Time Calculator
Find out how long to charge your battery with solar
Inverter Size Calculator
Determine the right inverter size for your needs
Fuse Size Calculator
Calculate the correct fuse size for your inverter