If you’re seeking a reliable upgrade or replacement for your RV’s hot water system, this guide highlights top add-on heater options that work with common RV water heaters. These picks are best for travelers who want propane-savings, faster hot water recovery, or easier maintenance. The selections include electric conversion kits, replacement elements, and compact tank heaters suitable for Suburban, Atwood, and similar brands. Below, compare suitability, installation notes, and potential limitations to help you choose the right add-on heater for your rig.
Summary table of selected products:
| Product | Best For | Notes |
|---|---|---|
| RV Water Heater Elements Kit Compatible With Suburban Tanks | RV owners needing an all-in-one maintenance kit | Includes magnesium anode rod, 520900 element, wrench, and tape |
| KINGRVER 6 Gallon RV Tank Water Heater | DIY installs needing three-mode heating | Gas, electric, or hybrid modes; compact fit |
| RVGUARD RV Water Heater Electric Conversion Kit (6 & 10 Gallon) | Propane-to-electric transition | Independent switch; adjustable thermostat |
| 520900 RV Water Heater Element for Suburban SW Series | Direct replacement element | Direct compatibility with Suburban SW series |
| Suburban SW12DE 12-Gallon RV Water Heater | Durable, flexible power options | DSI and Electric; replaceable anode rod |
RV Water Heater Elements Kit Compatible with Suburban Tanks
This maintenance kit is designed for Suburban RV water heater tanks (D, DE, DEL, DEM models). It includes a 9.25″ x 3/4″ NPT magnesium anode rod, a 520900 electric water heating element, a dual hex wrench, and tape. Best for: RV owners who want a single, ready-to-install kit to replace parts, protect the tank from corrosion, and ensure reliable heating. It is especially useful for ongoing upkeep and extending the life of the water heater. Limitations: Verify exact tank compatibility before purchasing, as some Suburban variants may use different threads or lengths.
KINGRVER 6 Gallon RV Tank Water Heater, Propane & Electric Hybrid
KingRver offers a compact 6-gallon unit with three heating modes: gas only, electric only, or a gas-electric hybrid. It’s compatible with typical 1/2″ NPT connections and includes a quick setup guide plus 24/7 support. Best for: RV owners who want flexible fuel options and a straightforward install in smaller RV spaces. It’s a solid choice for those who demand rapid hot water during peak usage. Caution: Ensure proper venting and space for the installation, as gas connections require safe clearance.
RVGUARD RV Water Heater Electric Conversion Kit, 6 Gallon
This conversion kit turns LP gas water heaters into electric operation while preserving LP components. It includes an adjustable thermostat to keep water from 90°F to 150°F and an independent switch for safe control. Best for: RV campers who want propane savings without sacrificing hot water availability. Limitation: The kit supports several popular brands but confirm exact tank compatibility for your model. It’s designed for safe, straightforward installation and operation.
520900 RV Water Heater Element for Suburban SW Series
This 520900 element replaces Suburban SW series models (including 232794, 520789, SU520789). It’s built to withstand outdoor RV use, resisting corrosion and wear. Best for: RV owners needing a direct, drop-in heating element replacement for reliable performance. Caution: Verify the exact part number in your heater’s service manual to ensure compatibility with your SW model.
Suburban SW12DE 12-Gallon RV Water Heater
This durable 12-gallon tank is designed for DSI and Electric operation. It features a replaceable anode rod and offers flexible power options for heating water via electric or combined power. Best for: RV owners needing a larger-capacity water heater that supports dual heating modes and long tank life. Limitation: Heavier unit may require more installation space and secure mounting in the RV shower or cabinet area.
Buying Guide
What to consider when choosing an RV electric add-on heater
- Tank compatibility: Verify model numbers, thread sizes (NPT), and connection types (1/2″ NPT is common).
- Power source and options: Decide between electric-only, propane conversion, or hybrid heating to match campsite availability and propane usage goals.
- Size and fit: Ensure the unit or kit fits your RV’s cabinet or tank space; consider overall dimensions and mounting clearance.
- Maintenance needs: Some kits include anode rods and replacement elements that simplify upkeep and extend tank life.
- Installation complexity: Some products are designed for DIY installation with step-by-step guides, while others may require professional service for gas fittings or electrical work.
- Temperature control: Look for adjustable thermostats and independent switches to prevent scalding and maintain comfort.
- Durability and materials: Materials like magnesium anodes and corrosion-resistant elements improve longevity in outdoor RV environments.
How to compare products quickly
- Best for propaneto-electric transitions: Choose conversion kits with adjustable thermostats and independent switches.
- Best for direct replacements: Pick 520900 or other direct-fit elements matched to Suburban or SW-series tanks.
- Best for larger capacity needs: Consider 12-gallon Suburban units for longer hot water supply between fills.
- Best all-in-one maintenance: Look for kits including anode rods, elements, and tools for complete upkeep.
Common questions and quick answers
- Will an electric conversion kit work with all RV water heaters? It depends on the model and connections; check compatibility with Suburban, Atwood, American, and More-Flo brands.
- Do I need a professional to install a conversion kit? Some kits are designed for DIY installation, but gas-to-electric transitions and electrical work may require professional assistance.
- Can I use propane and electricity at the same time? Hybrid models support multiple modes; follow manufacturer guidelines for safe operation.
- How long does a typical replacement element last? Durability depends on water quality and usage; elements like 520900 are designed to withstand mineral buildup and corrosion longer than standard parts.
- Is a larger tank always better for RVs? A larger tank increases hot-water capacity but requires more space and weight; choose based on typical shower usage and RV storage.
- Do these kits include all installation hardware? Most kits include essential components, but verify if you need extra sealant, thread tape, or hoses for your setup.
These options provide a range of solutions from direct element replacements to complete electric conversion kits and compact hybrid heaters. When selecting, prioritize compatibility with your RV’s existing tank, desired heating method, and installation space to ensure reliable hot water on every trip.