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Energy
Heating & Cooling
Shelter
Waste & Sanitization
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Tools
Energy
Battery Bank Calculator
Estimate the battery capacity required based on daily energy use, autonomy days, system voltage and chemistry.
Solar System Sizer
Size your off-grid solar system based on loads, sun hours, autonomy and voltage.
Heating
Heating Needs Calculator
Estimate required heating power (kW/BTU·h) and daily energy, plus rough wood/propane usage based on area, insulation, ΔT and infiltration.
Water
Rainwater Harvesting
Estimate annual collectible rainwater, daily coverage, and suggested tank size.
Water Tower Pressure
Calculate static water pressure from tank height (head) and convert between kPa, bar and PSI.
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