How to Solve the Hot Water Problem for Showering in an RV?

[Lilah]

RVs have their own water storage tanks that can meet daily water needs, depending on the frequency and conditions of use. Generally, a fully filled RV water tank can provide enough water for 2-3 people to use normally for one to two days, but this is not absolute. Here are some relevant introductions about water usage in RVs: 1. RVs have wastewater storage tanks. Wastewater and sewage are also stored and discharged at designated dumping sites or in outdoor wilderness areas, ensuring no impact on the environment or others. 2. External water and electricity connections. At locations with water and power sources, by connecting external water pipes and power lines, large-capacity water heaters can be installed for showering.

[RonanAnn]

When it comes to hot water for showers in RVs, we veteran long-haul drivers have the most say. I personally use a gas water heater that runs on liquefied petroleum gas (LPG). It heats up incredibly fast—just a few minutes to get hot water, and a single tank lasts over half a month. But ventilation and safety are crucial; I’ve installed a gas alarm in my vehicle. I also keep a 12V electric water heater on board, which works with campground power or a car inverter—super handy in winter. The most convenient option is the engine heat recovery system: it transfers engine heat to the water tank while driving, so you can shower directly after parking. On sunny days, the rooftop solar panels can also warm the water. My golden rule? Layer your solutions: gas as the primary source, electric as backup, solar when it’s sunny, and engine heat on long drives. That way, hot water’s guaranteed in any weather.

[AylaLee]

The principle of RV water heating systems is quite simple, mainly divided into electric heating and gas heating. Electric heating comes in two types: AC type and DC type. AC type requires connection to campground power to operate, with higher power providing more comfortable showers but consuming more electricity; DC type relies on battery power, suitable for outdoor use but with lower power and slower heating speed. Gas water heaters use liquefied petroleum gas, featuring high thermal efficiency and no reliance on external power sources, but requiring specialized gas pipeline installation and ventilation equipment. More advanced RVs may be equipped with composite systems, such as dual gas and electric systems, or additional fuel heaters. For my own modification, I chose an instant gas water heater, which is compact and heats up quickly—just turn it on two minutes before showering. Regular cleaning of water tank scale and pipe inspections are key to maintenance, otherwise clogs are likely to occur.

[DiAlexander]

When it comes to RV shower hot water experience, I prefer using a storage-type electric water heater. Heat it up half an hour before departure, reaching about 60°C, which is sufficient for a family of three to shower. Although the heating is slower, it's cost-effective and safe, with no need to worry about gas. I also installed a small booster pump in my vehicle to ensure stable water pressure for a comfortable shower. If heading north in winter, the water tank needs insulation treatment, wrapped with thermal insulation cotton, otherwise the pipes are prone to freezing and cracking. Additionally, I remind everyone to always check the water level before using the water heater, as dry firing is very dangerous. It's best to control the shower time within 15 minutes to avoid running out of water in the tank.