If you own an RV, you already know how important it is to make the most of your limited space and resources. Whether you’re touring the coast, camping in the outback, or parked up in a quiet forest retreat, hot water is one of those small luxuries that makes life on the road feel like home. That’s where a tankless electric water heater comes in. It heats water on demand, meaning no bulky tank taking up valuable space and no energy wasted keeping water hot all day.
In this guide, we’ll explore the best tankless electric water heaters for RVs in 2025, explain what makes them different from household models, and share tips for choosing, installing, and maintaining your unit. Plus, we’ll cover a crucial but often-overlooked part of your RV’s plumbing system that can save you from expensive headaches.
Why Go Tankless in an RV?
Tankless electric water heaters offer several advantages for RV owners:
- Space savings: Compact, wall-mounted designs free up precious storage space.
- Energy efficiency: Only heats water when you turn on the tap or shower.
- Endless hot water: Perfect for long showers or back-to-back washing without waiting for a tank to refill.
- Low maintenance: Fewer parts to maintain compared to traditional tank systems.
- Quiet operation: Ideal for peaceful campsites.
Best Overall: EcoSmart ECO 11
The EcoSmart ECO 11 is a compact and efficient option that works well for RVs with a reliable electrical hookup or generator power. It’s designed for point-of-use or small whole-system applications in warm to moderate climates.
- Flow rate: Up to 2.5 GPM—enough for a shower and sink simultaneously.
- Self-modulating technology adjusts energy use based on demand.
- Small footprint, making it easy to fit in tight RV compartments.
- Digital temperature control for comfort and safety.
Other Top Tankless Electric Water Heaters for RVs
Girard 2GWHAM On-Demand Electric Hybrid
Known for its RV-specific design, this unit runs efficiently with 120V power and has built-in freeze protection, making it a solid choice for year-round travel.
Camplux ME25 / Mini Electric Units
Perfect for smaller RV setups or point-of-use hot water, Camplux units are affordable, easy to install, and great for weekend campers.
Stiebel Eltron Mini 2-1
Ultra-compact and reliable, ideal for under-sink installations in RV kitchens or bathrooms.
Bosch Tronic 3000 T
While technically a small tank model, its compact design and rapid recovery make it a favourite for RVers who want consistent hot water with minimal energy draw.
Choosing the Right Electric Tankless Water Heater for Your RV
Unlike residential setups, RV water heaters need to be chosen with a few extra considerations in mind:
- Electrical capacity: Check your RV’s power system—many tankless units need 240V or high-amperage 120V circuits.
- Water pressure: Ensure the unit can operate with typical RV pump pressures (often 30–50 PSI).
- Flow rate: Match the unit’s capacity to your needs; small units are fine for single-use, larger ones for multiple outlets.
- Climate: In colder weather, incoming water temperature will be lower, requiring more heating power.
- Installation location: Pick a spot with easy access for maintenance and where freezing is less likely.
Pro Tip: If you travel in freezing conditions, look for a unit with built-in freeze protection or install it in a heated compartment.
Installation Tips
Installing a tankless electric water heater in an RV is usually straightforward but should be done with care:
- Use proper electrical wiring and breakers as recommended by the manufacturer.
- Mount the unit securely to withstand vibration during travel.
- Position it close to your main hot water outlets to reduce wait times.
- If replacing a propane unit, ensure all gas lines are safely capped.
Maintenance for Longevity
Tankless electric units require minimal upkeep, but regular maintenance extends their life:
- Flush the unit annually in hard water areas to prevent mineral buildup.
- Check electrical connections periodically for tightness and corrosion.
- Clean inlet filters to maintain strong water flow.
The Overlooked Side of RV Plumbing
While your new tankless water heater will give you endless hot showers, your RV’s wastewater system needs attention too—especially if you rely on a black water tank or travel to areas with septic hookups. Poor maintenance can lead to foul smells, clogs, and costly repairs that can ruin your trip.
Many RV owners only think about their waste system when there’s a problem, but regular preventative care is far easier and less stressful.
SEPTIFIX – Keep Your RV Waste System in Top Shape
SEPTIFIX is the #1 septic tank treatment in North America, trusted by thousands of RV owners. These flushable tablets release oxygen and beneficial bacteria that break down waste, grease, and sludge, while neutralising odours.
Benefits include:
- Eliminates odours within days.
- Prevents clogs and costly pump-outs.
- Safe for all RV black water systems and septic hookups.
- Simple to use—just flush one tablet per month while connected to your system.
Pairing your RV tankless water heater with regular SEPTIFIX use ensures the whole plumbing system works smoothly, from hot water delivery to waste disposal.
Final Thoughts
For 2025, the EcoSmart ECO 11 is the best overall tankless electric water heater for RV use thanks to its compact size, efficient operation, and ability to provide reliable hot water on the road. The Girard 2GWHAM, Camplux ME series, Stiebel Eltron Mini 2-1, and Bosch Tronic 3000 T are also excellent choices depending on your needs and budget.
And remember—hot water is only one part of RV comfort. Keeping your wastewater system healthy with SEPTIFIX will ensure your adventures remain trouble-free from start to finish.
Order SEPTIFIX Today – Keep Your RV Plumbing Fresh and Odour-Free
Hot showers, clean dishes, and a fresh-smelling RV—that’s the way to travel in comfort.