Typically, the best hot water heaters for trailers deliver instant hot water, work off propane or 12V power, and perform well at high altitudes or in remote locations. This guide highlights five reliable RV tankless and electric options, detailing who each is best for and why they stand out. Ideal for full-time RV living, weekend campers, or families needing reliable showers while off-grid.
Summary of top picks
- Somokg Store RV Tankless Water Heater: Best for off-grid campers who want instant hot water and reliable ignition at high altitude.
- Xenjum Store RV Tankless Water Heater: Best for full-time RV users needing dual outlets and precise remote control.
- Suburban 6-Gallon RV Water Heater: Best for those preferring a traditional tank option with flexible power.
- Poukaran 65,000 BTU Tankless: Best for high-demand households with outdoor-use capabilities.
- Ranein RA65EH: Best for families needing strong flow and altitude compatibility with an advanced remote.
Buying context: When comparing, consider installation opening size, BTU/GPM, power source (propane vs DC 12V), altitude performance, and whether an external door is included. The following sections break down each option’s strengths, limitations, and ideal buyer profiles.
Somokg Store RV Tankless Water Heater: 65,000 BTU, 3.9 GPM
This propane-powered, on-demand unit delivers up to 3.9 GPM with instant heating and precise ±1°F control. It features a 1.5 kg copper heat exchanger and reinforced elbows to resist leaks and withstand high altitude operation (up to 9840 ft). Automatic flame adjustment helps maintain safe temperatures across seasons. Best for: Off-grid campers who want dependable, continuous hot water with strong ignition reliability in cold or high-altitude environments. Limitation: Requires proper venting and clearance per installation guidelines.
Xenjum Store RV Tankless Water Heater: 65,000 BTU Dual-Outlet
This dual-outlet system provides interior and exterior hot water distribution with a 65,000 BTU burner and 3.9 GPM. Temperature is adjustable from 95–123°F, controlled via remote, with automatic seasonal flame adjustment for energy efficiency. Best for: RVs needing hot water at multiple taps simultaneously, including outdoor tasks. Limitation: Exterior door kit sold separately, if you need a match for the opening size.
Suburban 6-Gallon RV Water Heater (DSI & Electric)
This porcelain-lined steel tank offers a durable, residential-like design with a replaceable anode rod that doubles as a drain, simplifying maintenance. It supports flexible power options including an electric element for use with generator or campsite power. Best for: RVers who prefer a traditional tank with simple maintenance and mixed power setups. Limitation: Less immediate hot-water response compared with tankless units.
65,000 BTU RV Tankless Water Heater: 12V, Dual Outlet
This DC 12V, propane-powered unit offers on-demand hot water with dual outlets and a compact 15″ x 15″ door requirement. High-altitude performance and automatic temperature regulation provide stability from 95°F to 123°F. Best for: RVs needing quick, simultaneous hot-water access across spaces while conserving propane. Limitation: Installation requires precise cutouts and compatible exterior door kit if retrofitting an existing opening.
Ranein RV Tankless Water Heater: 65,000 BTU, RA65EH
Powered by a 65,000 BTU burner, this unit delivers up to 3.9 GPM with high-altitude mode and a multi-function remote that shows gas use, voltage, water flow, and anti-freeze status. It is designed for simultaneous family use with robust control. Best for: RV households seeking reliable, high-flow hot water and advanced monitoring. Limitation: Exterior door not included by default; check compatibility for your opening size.
Buying Guide: How To Choose The Right RV Water Heater
What heat source matches your trips?
- Propane tankless units are powerful for cold weather and remote camps, but require ventilation and gas line considerations.
- DC 12V models minimize electrical draw but may be limited by battery capacity and generator availability.
Do you need tank vs. tankless?
- Tank heaters provide steady hot water even with intermittent power, but take longer to heat and may run out.
- Tankless models heat on demand for continuous showers, saving water and propane when used efficiently.
How much water flow is desired?
- GPM (gallons per minute) indicates the number of outlets you can run simultaneously without temperature drops.
Installation considerations
- Opening size and door compatibility influence which models fit your RV. Some units require a 15″ x 15″ door or larger.
- Altitude performance matters for mountain camping; choose units with automatic flame adjustment for high elevations.
Maintenance and safety
- Replaceable anode rods and accessible drains extend tank life for tank models; tankless units rely on robust heat exchangers and safe ignition systems.
- Regular inspection of gas lines, venting, and electrical connections reduces safety risks.
Frequently Asked Questions
- What size RV water heater do I need?
Choose based on the number of simultaneous users and the intended use at once (showers, dishes, outdoor tasks). - Are RV tankless heaters better for off-grid camping?
Yes, they typically offer on-demand hot water with less propane waste, but installation may be more complex. - Can I install a tankless heater in a small RV?
Yes, if the cutout size and venting requirements fit your space, and you have proper mounting clearance. - Do all RV heaters require a door kit?
Some models include a door or have compatible doors sold separately; check specs for your model. - Which heater is best for high altitude?
Units with high-altitude or altitude-adjustment features maintain stable temperatures in thin air. - Is 3.9 GPM sufficient for a family shower?
Often yes, but water pressure and temperature stability depend on the source and configuration of outlets.