Tankless RV Water Heater: Full Buyer’s Guide
Disclosure: Some of the links in this article may be affiliate links, which can provide compensation to me at no cost to you if you decide to purchase. This site is not intended to provide financial advice and is for entertainment only.
If you’ve ever tried to take a long hot shower in an RV, you know the struggle. For years, I used the 'navy shower' method: turn on the water to rinse, turn it off to soap up, then turn it back on to rinse again. It’s second nature now—I even do it at the gym out of habit. But I’d be lying if I said I wasn’t tempted by those new rigs with tankless water heaters. An endless stream of hot water? Sign me up.
I’ve been researching tankless RV water heater systems for a while now, and if you’re in the same boat (or RV), here’s everything I’ve learned so far.
What Is a Tankless RV Water Heater?
A tankless water heater, also known as an on-demand system, heats water as it flows through the unit. Instead of storing hot water in a tank, it heats it instantly with either propane or electricity. When you turn on the tap, the water passes through a heat exchanger and reaches your desired temperature fast—provided your water and power supply are solid.
Why Go Tankless?
Pros:
Endless Hot Water: Great for long showers, dishes, or having guests onboard.
Energy Efficient: Only uses power or propane when water is flowing. Need a portable powersource to run your water heater when boondocking? Check out my blog post about the Anker solix f2000.
Space-Saving: No bulky tank taking up storage.
Low Maintenance: No flushing or anode rod swaps.
Lighter Weight: One less heavy tank to haul around.
Cons:
High Upfront Cost: These units aren't cheap.
Needs Steady Power/Water: Not ideal if you’re boondocking.
Cold Weather Sensitivity: Requires freeze protection or insulation.
Slight Delay in Hot Water: Expect a second or two of cold before heat kicks in.
Professional Install Recommended: Especially if you’re uncomfortable with propane or plumbing. If you want to get more comfortable doing this kind of work yourself, check out my blog post about an amazing RV tech course I took and recommend.
Types of Tankless RV Water Heater Systems
Propane Systems
Best for off-grid RVers. Heats water quickly and efficiently, even in colder temps.
Electric Systems
Great for eco-conscious travelers plugged into shore power or running a solid solar setup. May struggle in cold temps.
Hybrid Systems
Combines propane and electric for flexible usage. Ideal for varying conditions.
Point-of-Use Systems
Small units installed at a single faucet or shower. Great for van builds or tight setups.
🔥 Propane Tankless Water Heater Picks
1. VEVOR RV Tankless Water Heater
65,000 BTU output for robust hot water
Includes a 15 × 15″ front door and remote control
Propane-powered—built for full-time RV use
New on the market and gaining positive reviews. Check out their pricing below:
2. Fogatti InstaShower 8 Pro
55,000 BTU heat output, up to 2.9 GPM flow
Thermostatic mixing tank for stable temps
High-altitude capable (up to 9,800 ft)
84% efficiency with pulse ignition and multi-safety features
CSA/ETL certified with built-in safety protections. Check their pricing below:
3. Camplux Portable Tankless Heater
34,000 BTU output with 1.32 GPM flow
Starts at very low water pressure (≥ 3 PSI)
Portable 10 lb design; battery ignition and safety sensors
CSA-approved with freeze protection. Check out their pricing:
4. Lecloc L9
Mid-range propane unit sized for RV retrofit builds
Ideal capacity for solo or couple use
Early feedback suggests reliable, budget-friendly performance
5. Girard 2GWHAM
42,000 BTU output with built-in freeze protection
No tank means lighter weight, no anode rod needed
Automatic burner regulation for consistent temp
Popular with 72% 5-star ratings among 1,100+ reviewers
Key Considerations
Fuel Type: Propane vs. electric depends on how and where you travel.
Flow Rate: Bigger rigs or multiple faucets? You’ll want at least 2.5 GPM. Some units won't heat up or stay running if you don't have enough water pressure. This is a big consideration for boondockers and the main reason I haven't installed one in my Motorhome as of yet.
Installation: Are you handy or calling in a pro? Did you take the RV tech course I suggested? You should!
Water Source: Limited tank? You’ll still need to conserve.
Budget: Expect to spend $300-$1200 depending on the model.
Tips for Use and Maintenance
Flush periodically to prevent sediment buildup.
Check for leaks regularly.
Keep an eye on propane or battery charge.
Install a pressure regulator to avoid damaging your system.
Use low-flow fixtures to stretch your water.
Insulate in cold weather or add a freeze protection kit. Need other tips for how to winterize your rig, check out my blog post.
Best Electric Water Heater for Van Builds with Solar Power
If I were doing a van build and had a solid solar and battery setup, the VEVOR Electric Mini-Tank Water Heater (8 Gallon) is the unit I’d go with. It's compact, powerful, and doesn’t rely on propane—which simplifies things. With 1440W of heating power and enough capacity for a quick shower or dish duty, it hits the sweet spot between convenience and efficiency. The glass-lined tank adds durability, and its versatile mounting options make it perfect for tight van spaces. It’s not just practical—it would let me finally ditch the gym showers and enjoy real hot water, on my terms. Check out the pricing below:
Final Thoughts
Switching to a tankless RV water heater isn’t just about luxury—it’s about practicality. For full timers like me, it makes a huge difference in comfort, especially when you have full hookups. That said, the upfront cost is what's holding me back. If you're on the fence, hopefully this buyer's guide gave you a better picture of whether it's the right fit for your rig.
And if you’re brand new to RV living, don’t miss my eBook Rolling Solo ($5 CAD), packed with real talk about what it’s really like to live this way. Grab it here.
Author: Royanne, road-tested nomad since 2009 and the voice behind MissadVANture.
Disclosure: Some of the links in this article may be affiliate links, which can provide compensation to me at no cost to you if you decide to purchase. This site is not intended to provide financial advice and is for entertainment only.