Find out what is likely to send you back to town first: battery charge, fresh water, or room in the gray tank.
Camper Van Off-Grid Runtime Calculator
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How it works
Compare usable battery watt-hours divided by net daily energy demand, fresh water divided by daily use, and remaining gray tank space divided by daily inflow. The shortest of the three estimates sets the stay length.
What to check before you use the result
Start with the water and usable charge you have now. Averaging solar over a day can hide overnight shortages or several cloudy days in a row.
