All Calculators
Every calculator works without an account. Start with the Off-Grid Power Planner if you want a full setup recommendation, or jump straight to a specific calculation below.
Power Stations & Sizing
Power Station Size Calculator
Work out what size portable power station you need in Wh, based on the devices you want to run, how many hours per day, and how many days off-grid.
Inverter Size Calculator
Calculate the continuous and surge inverter capacity you need based on the AC appliances you plan to run, including simultaneous use.
Solar
Solar Panel Size Calculator
Calculate the solar array size you need based on daily energy consumption, peak sun hours and system efficiency.
Solar Charging Time Calculator
Estimate how many hours of sun it will take to recharge your battery or power station with a given solar panel wattage.
Solar vs Battery Balance Calculator
Model your battery capacity, solar input, daily consumption and trip length together to see whether solar or battery capacity is your bottleneck.
Caravan & RV
Caravan Power Calculator
Size your caravan's 12V and AC appliance load, battery bank, solar array and inverter for extended off-grid touring.
RV Power Calculator
Size your RV's 12V and AC appliance load, battery bank, solar array and inverter for boondocking and off-grid RV travel.
Caravan Battery Size Calculator
Work out what size lithium (LiFePO4) battery your caravan needs in Wh and Ah at 12V, 24V or 48V, based on daily use, autonomy and solar.
Camping & Overlanding
Camping Power Calculator
Calculate your camping power needs — fridge, lights, phones, Starlink and more — and get a recommended power station and solar size for your next trip.
Off-Grid Days Calculator
Estimate how many days you can camp off-grid based on your battery capacity, daily energy use, and solar input under different sun scenarios.
Runtime
Battery Runtime Calculator
Estimate how long a battery or power station will run a given load, based on capacity, chemistry, usable depth of discharge and efficiency.
12V Fridge Runtime Calculator
Estimate how long your 12V camping or caravan fridge will run on a given battery or power station, using measured or estimated daily consumption.