Buying guide · 10 min read · Updated October 2, 2026

5 Best 8 Gallon RV Water Heater in 2026: A Practical RV Guide

Best 8 gallon RV water heaters compared as electric mini tanks, with notes on stainless versus enamel tanks, wattage, certification wording and fit.

By Bowen HigginsRV Editor at RV Gear Lab5 products comparedSpec-sheet researched

An 8 gallon electric mini tank is a point-of-use heater for small RVs, conversions and extra sinks, not a gas heater replacement. This shortlist compares five 120V options on tank construction, certifications and size.

Each listing was read for tank material, wattage, safety wording and stated dimensions, and the 120V amp draw is flagged for every pick.

RV Gear Lab field notes

The Rig Fit Check

Start with the job: Electrolux Electric Tank Water Heater 8 Gal leads this shortlist for Brand-minded buyers. Use that fit as a reference point, then compare the alternatives against your own space and workload.
Specs that separate the picks: The first details to compare are 8 gallon enamel-lined tank, 1500W Incoloy-800 element, 1500W rapid heating. Confirm the exact model and included components before ordering.
Trade-off to plan for: Electric only

Before you buy

What Matters Before You Choose an 8 Gallon RV Water Heater

Key buying criteria so you get the right fit the first time.

01
Point-of-use vs RV heater
An 8 gallon electric mini tank serves one location, not the whole RV. It matters for plumbing and power. Use it as an extra heater.
02
Wattage and amps
A 1500W heater draws about 12.5 amps at 120V. It matters on 15 or 20 amp circuits. Check your supply.
03
Tank material
Stainless tanks resist rust, while enamel-lined tanks depend on a coating. It matters over time. Read the listing.
04
Certification wording
UL, CE and FCC cover different things. It matters because a mark is not a guarantee. Read each.
05
Size and fit
8 gallon bodies are larger than 4 gallon units. It matters for tight cabinets. Compare the stated dimensions.

Our standards

Why You Can Trust RV Gear Lab

At RV Gear Lab, we compare products based on rig fit and power or hookup compatibility, verified specifications, usability, setup requirements, weight, durability, and real-world trade-offs. We do not rank products purely on marketing claims or commission rates.

We have not personally tested every product listed. Where hands-on testing is not available, recommendations are based on verified manufacturer specifications, product documentation, use-case fit, and comparative research.

How we review RV gear →

Detailed reviews

The 5 best 8 gallon rv water heater, explained

Best Brand-Name Under-Sink Heater · 1 of 5

Electrolux Electric Tank Water Heater 8 Gal

8 gallon enamel-lined tank
120V plug-in
UL fireproof cover, T&P valve

Check price on Amazon

Best for: Brand-minded buyers

Our take

Best for buyers who want a recognizable brand and a UL-certified cover.

Why it made the shortlist

The Electrolux Electric Tank Water Heater is an 8 gallon 120V plug-in unit with a thick enamel-coated inner tank. The listing says it includes a 5VA UL-certified fireproof cover and a T&P relief valve.

Compared with the Feelrogast units, it adds a known brand.

What works

Recognizable brand
UL-certified fireproof cover
T&P relief valve
Plug-in install

Watch out for

Electric only

The catch: It needs only a 120V outlet and no gas line, and the listing names RV use alongside kitchens and garages.

Check price on Amazon

Best Hard-Wired Low Profile · 2 of 5

ThermoMate Tank Water Heater Electric

1500W Incoloy-800 element
Porcelain enamel glass tank
20.75 inch low profile

Check price on Amazon

Best for: Permanent install buyers

Our take

A solid choice for permanent installs and booster use.

Why it made the shortlist

The ThermoMate 8 Gallon is a 120V 1500W hard-wired heater with an Incoloy-800 heating element and a porcelain enamel glass tank. It is 20.75 inches tall for a low-profile fit.

Unlike the plug-in Electrolux, it is hard-wired and can work independently or as a booster. The element is more corrosion resistant than copper at higher temperature per the listing.

What works

Corrosion-resistant element
Low-profile 20.75 inch height
Works as a booster
Adjustable thermostat

Watch out for

Hard-wired install needed

Check price on Amazon

Best Wide Temperature Range · 3 of 5

8Gallon Mini Tank Water Heater Electric

1500W rapid heating
50 to 167 F range
23.62 by 13.39 by 13.39 inches

Check price on Amazon

Best for: Wide-range buyers

Our take

Best for buyers who want a wide thermostat range at a lower price.

Why it made the shortlist

The Baococo 8 Gallon Mini Tank has a 1500W heating tube, over 90 percent thermal efficiency and a temperature range of 50 to 167 F. Its dimensions are listed at 23.62 by 13.39 by 13.39 inches.

It has the widest range among these and multiple safety protections including overheating. It costs less than the ThermoMate and Electrolux.

What works

Wide 50 to 167 F range
Stated dimensions
Multiple safety protections

Watch out for

Electric only
Short on certifications

Check price on Amazon

Best Flexible Mounting · 4 of 5

Feelrogast Electric Tank Water Heater-8 Gallon Under Sink Instant Hot Water for Kitchen

1440W stainless tank
Wall, rack or floor install
CE, ROHS and FCC

Check price on Amazon

Best for: Flexible-mounting buyers

Our take

A great pick for flexible mounting and a stainless tank.

Why it made the shortlist

The Feelrogast Electric Tank Water Heater is an 8 gallon 1440W unit with a 1.88 mm thick stainless steel tank and CE, ROHS and FCC certification. It can mount on a wall, rack or floor with a hidden install.

It lists leakage protection, a high-temperature limiting device and a maximum 109 psi pressure. It costs less than the Baococo.

What works

Stainless tank 1.88 mm thick
Wall, rack or floor mounting
Leakage protection plug

Watch out for

Electric only
Maximum 109 psi pressure

Check price on Amazon

Best Complete Accessory Kit · 5 of 5

Feelrogast 8 Gallon Electric Tank Water Heater

8 gallon, 1440W
Double-layer enamel coating
Safety valve and drain pipe

Check price on Amazon

Best for: First-time installers

Our take

Best for first-time installers who want accessories included.

Why it made the shortlist

The Feelrogast 8 Gallon Electric Tank Water Heater lists a 16.93 by 14.17 by 17.72 inch body, 1/2 inch NPT connectors and 1440W at 110/120V.

It comes with a safety valve and PVC drain pipe, a fuller accessory set than the wall-mount version. It sits about $20 above that unit.

What works

Safety valve and PVC drain included
Stated dimensions
CE, ROHS and FCC certified
Double-layer enamel coating

Watch out for

Electric only
Larger body than a 4 gallon

Check price on Amazon

Methodology

How We Built This Shortlist

Each pick was assessed across 4 criteria weighted for real-world use.

8 gallon match

Only 8 gallon listings were credited.

Tank material

Stainless and enamel-lined tanks were compared.

Wattage

1440W and 1500W draw was noted.

Certifications

UL, CE and FCC wording was read exactly.

Decision guide

Match an 8 Gallon RV Water Heater to Your RV

By install type

Your situation	Recommended pick	Why
Plug-in under sink	Electrolux 8 Gal	120V plug-in with UL fireproof cover
Hard-wired or booster	ThermoMate 8 Gal	Hard-wired low profile
Wide thermostat range	Baococo 8 Gal	50 to 167 F
Flexible mounting	Feelrogast 8 Gal Wall Mount	Wall, rack or floor
Accessories included	Feelrogast 8 Gal Kit	Valve and drain pipe

By Budget

Budget	Recommended pick
$140 to $170	Feelrogast 8 Gal Wall Mount or Feelrogast 8 Gal Kit
$180 to $250	Baococo 8 Gal or Electrolux 8 Gal
$270 to $280	ThermoMate 8 Gal

Stainless tank vs enamel-lined tank

Stainless tank

The Feelrogast 8 Gal Wall Mount uses a stainless steel tank.

Enamel-lined tank

The Electrolux 8 Gal, ThermoMate 8 Gal and Feelrogast 8 Gal Kit use enamel or porcelain coatings.

Most buyers should choose the Feelrogast 8 Gal Wall Mount for rust resistance.

By budget

Budget	Recommended pick
Lowest cost	Feelrogast 8 Gal Wall Mount
Mid cost	Baococo 8 Gal
Brand name	Electrolux 8 Gal
Hard-wired premium	ThermoMate 8 Gal

For Conversions and Tiny RVs Specifically

Look for

plug-in power and compact size

In this comparison

The Electrolux 8 Gal plugs into 120V and the Baococo 8 Gal lists its dimensions.

When to Spend More

Spend more if

Spend more if you want brand and certifications: the Electrolux 8 Gal and ThermoMate 8 Gal cost more.

Save if

Save if you want a basic electric tank: the Feelrogast 8 Gal Wall Mount and Baococo 8 Gal are cheaper.

FAQ

Before You Bring One Home

Can an 8 gallon mini tank replace my RV heater?

No. It is an electric point-of-use unit, so use it as an extra or booster.

What mistake do people make?

Ignoring amp draw. A 1500W heater uses about 12.5 amps.

Is the Electrolux 8 Gal worth it over Feelrogast?

If you want a UL-certified cover and a known brand, yes. Feelrogast units cost less.

How do I install a mini tank?

Mount the tank, connect the 1/2 inch lines and fill it completely before applying power. Then plug in or wire it to a 120V circuit and set the thermostat.

How do I maintain it?

Drain and flush the tank each season to clear sediment. Keep it from freezing in storage and check the relief valve for drips.

Bottom line

The short version

Best Brand-Name Under-Sink Heater
Electrolux Electric Tank Water Heater 8 Gal
Check price for Electrolux Electric Tank Water Heater 8 Gal (opens in a new tab)
Best Hard-Wired Low Profile
ThermoMate Tank Water Heater Electric
Check price for ThermoMate Tank Water Heater Electric (opens in a new tab)
Best Wide Temperature Range
8Gallon Mini Tank Water Heater Electric
Check price for 8Gallon Mini Tank Water Heater Electric (opens in a new tab)
Best Flexible Mounting
Feelrogast Electric Tank Water Heater-8 Gallon Under Sink Instant Hot Water for Kitchen
Check price for Feelrogast Electric Tank Water Heater-8 Gallon Under Sink Instant Hot Water for Kitchen (opens in a new tab)
Best Complete Accessory Kit
Feelrogast 8 Gallon Electric Tank Water Heater
Check price for Feelrogast 8 Gallon Electric Tank Water Heater (opens in a new tab)

Browse more 8 gallon rv water heater on Amazon →

About the author

Bowen Higgins

RV Editor at RV Gear Lab

Bowen covers RV power, water systems, towing and leveling, upkeep and interior comfort, with a focus on matching gear to the rig, the hookups and the way you actually travel.

5 Best 8 Gallon RV Water Heater in 2026: A Practical RV Guide

Our top picks

The Rig Fit Check

What Matters Before You Choose an 8 Gallon RV Water Heater

Point-of-use vs RV heater

Wattage and amps

Tank material

Certification wording

Size and fit

Why You Can Trust RV Gear Lab

The 5 best 8 gallon rv water heater, explained

Electrolux Electric Tank Water Heater 8 Gal

ThermoMate Tank Water Heater Electric

8Gallon Mini Tank Water Heater Electric

Feelrogast Electric Tank Water Heater-8 Gallon Under Sink Instant Hot Water for Kitchen

Feelrogast 8 Gallon Electric Tank Water Heater

How We Built This Shortlist

8 gallon match

Tank material

Wattage

Certifications

Match an 8 Gallon RV Water Heater to Your RV

By install type

By Budget

Stainless tank vs enamel-lined tank

By budget

For Conversions and Tiny RVs Specifically

When to Spend More

Before You Bring One Home

Can an 8 gallon mini tank replace my RV heater?

What mistake do people make?

Is the Electrolux 8 Gal worth it over Feelrogast?

How do I install a mini tank?

How do I maintain it?

The short version

Bowen Higgins

Related guides