Best 12v Water Heater Deals Online in the UK (10 Deals Found)

Last Updated - 14/09/2026 Sort By:

Best Choice
FVSTR

New
Dual Power Water Heater, 12V DC 200W/230V AC 1500W, 15L, for Caravan Camping UK Plug 230v RV Tank Water Heater, Instant
DUAL POWER SUPPLY: This product is compatible with ** DC 12V (200W) and AC 230V (1500W)** two power input modes, the use

£269.00
FVSTR

New
Dual Power Water Heater, 12V DC 200W/230V AC 1500W, 10L, for Caravan Camping UK Plug 230v RV Tank Water Heater, Instant
DUAL POWER SUPPLY: This product is compatible with ** DC 12V (200W) and AC 230V (1500W)** two power input modes, the use

£239.00
Best Value
nmbhus

New
nmbhus 12v/24v Immersion Water Heating Element DC Vehicle Mounted Portable Cartridge Heater 100w/200w Resistance (Size :
Good thermal conductivity, the wire can be used in the environment for a long time, good mechanical properties.

£8.89 £11.50
COAKUE

New
COAKUE RV Tankless Water Heater,65,000 BTU RV Instant Hot Propane Gas Water Heater,DC 12V,MAX 3.9GPM,W/ 15 x 15 inches D
【CONTINUOUS HOT WATER】RV Tankless Water Heater with 65,000 BTU of power, it can produce a maximum of 3.9 GPM of hot wate

£285.99 £293.99
17% Off
FEETER

New
FEETER Heating 12V/24V for Portable Water Heater in Vehicles for Car and Truck Applications 24V200W
Versatile Application: This 12V/24V heating is perfect for heating up to 2L of water in various settings including cars,

£17.15 £20.70
XmyXGAR

New
XmyXGAR 5KW 12V Hydronic Coolant Heater, with Remote Control, Liquid Fuel Heater, Diesel Water Heater, Temperature Contr
【Bi-directional control】: remote control and control of the control panel, various control methods, adjustable temperatu

£200.00
DERNORD

New
DERNORD 12V 200W DC Submersible Water Heater Element Stainless Steel Heating Element with 1 Inch BSP Thread Fitting U Ty
Size: 12V 150W, 1 inch （33.25mm）DN25 BSP Stainless Steel flange, tube length 210 mm.

£22.67
Tsolzdadi

New
Tsolzdadi 12"x18" RV Water Tank Heating Pad 12V/13.5V, 2 Pack RV Tank Heater Pad with Automatic Thermostat for Camper/Tr
【Anti-freezed Design 】The RV tank heater pad Provides heat for RV, Camper, Trailer, Mobile home, Boat, Marine in winter.

£37.37 £38.76
Sonew

New
Sonew 12V/24V Car Drink Immersion Heater Car Immersion Fitting & Assembly Parts Water Heater(12V) Kettle Tea
WATER CAR IMMERSION HIGH QUALITY AND DURABILITY: The car heats fast and is made of high quality stainless steel and bake

£6.91
zhongqianji

New
zhongqianji 7kW 12V Diesel Heater with Water Air Heater for Campervan，Boat
【Efficient Diesel Air Heater and Diesel Water Heater】This high-performance 12v diesel heater delivers rapid heating for

£230.00

10 12v Water Heater deals are available from: Amazon stores, starting from £6.91.
The biggest discount we found is 23% on nmbhus 12v/24v Immersion Water Heating Element DC Vehicle Mounted Portable Cartridge Heater 100w/200w Resistance (Size : 12V 100W), 1005005241070985 at Amazon.
The lowest price we found is £6.91 while the highest is £285.99.
Prices for the best 12v Water Heater deals average at £131.70.
Last updated on September 14, 2026.
We scanned these quality online stores and more to deliver you with the best offers online available for 12v Water Heater.