Onsen 10L Portable Propane Water Heater with 12V Pump & Accumulator Tank


The Onsen 10L portable tankless water heater is Onsen’s most powerful portable water heater and can turn freezing cold water into instant hot water so you can enjoy a hot shower on all your outdoor adventures.

Featuring a premium shower head, digital screen and included 12V battery clips, the Onsen 10L runs on a standard propane tank and is perfect for hunting camps, off-grid cabins, camping, boating, pet grooming, horse trailers, stables or simply rinsing off by the pool.

Working in combination with the Onsen 3.0 Diaphragm RV / Marine 12V Water Pump, the Onsen 10L will provide the comfort of instant, pressurized, hot water in any off-grid situation. The addition of the Onsen 1.0L Accumulator Tank, which ensures even water flow by acting as a pressure buffer for the pump, enhances the experience by providing better control of hot water temperatures. The Onsen Accumulator also helps to extend the life of the pump, decreases power consumption, and reduces plumbing noise (pipe hammer).

Please note that pump water hoses shown in image are not included.

Out of stock

Additional information

Weight 19 lbs
Dimensions 25.5 × 13.5 × 7 in

Default Title


Model 10L
BTUs 75,000
Fuel type Liquid propane
Portable Yes
Water Pressure Requirement 10-80 PSI
Ignition system 2 “D” batteries / 12 volts
Max temperature 60°C / 140°F
CSA Listed No
Indoor/Outdoor Outdoor
Vent Type None required
Weight 19 lbs / 8.62 kg
Dimensions 25.5 x 13.5 x 7 in.
Warranty 2-year limited

Operating Manual

Operating Manual 10L Portable Tankless Water Heater

Operating Manual Onsen 3.0 Diaphragm RV / Marine 12V Water Pump

Onsen 1.0L Accumulator Tank


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