For campers who want
hot water anytime, not just when the sun is out, merging a
battery pump with an inline propane water heater is a powerful solution. Portable heaters like the
Pipe Volume Calculator 5L allow you to heat water instantly by running it through a gas-powered heating unit. Pairing this with a battery-powered pump lets you draw water from any source, heat it, and get a warm shower on-demand—whether it’s morning, evening, or cloudy outside. This setup is bulkier and best suited for car camping, van life, or base camps, but it delivers the ultimate comfort.