Off-Grid Calculators
Free tools to plan your off-grid system. Get accurate numbers for battery banks, solar panels, inverters, rainwater tanks, and more.
Battery Sizing Calculator
Calculate how many batteries you need for your daily usage, desired autonomy days, and depth of discharge.
Solar Array Sizing
Work out how many solar panels and what wattage you need for your location and daily generation target.
Inverter Sizing
Right-size your inverter for starting currents, surge loads, and continuous power draw.
Load Analysis
List your appliances, wattage, and daily run times to get your total daily Wh consumption.
Off-Grid ROI Calculator
Compare the cost of off-grid living vs grid power over 10, 15, or 20 years in your area.
Rainwater Harvesting
Calculate how much rainwater you can collect and what tank size you need for your roof area.
Composting Toilet Sizing
Work out capacity, emptying frequency, and carbon material requirements for your household size.