The Australian designed and approved Duoetto MK2 offers selectable temperatures between 30-75ºC on 240v and a fixed temperature of 70°C on 12v so that you can shower, wash, cook, clean and enjoy abundant hot water.

Whether visiting the Outback, adventuring on one of Australia’s many waterways, or travelling for business or pleasure, this unique product will provide sufficient hot water for you and another to shower in comfort.



Product Description

Suitable For


  • Variable thermostat 30-75°C on 240v
  • Fixed thermostat up to 70°C on 12v
  • Durable outer case with service and inspection points
  • SPCC steel & enamel tank
  • Single weld line
  • Polyurethane insulation
  • Automatic voltage detection switching from 12v to 240v and vice versa
  • Over temperature and run dry protection
  • Combination pressure relief valve and non return valve
  • Incoloy 840 heating element


Compact size 409mm x 262mm x 267mm
Rated Voltage 12v (25A, 300W) and/or 240v (4.2A, 1000W)
Rated Capacity 10L
Warranty 12 months
Combo Deals

2 reviews for Duoetto MK2 Water Heater (10L 12v/240v)

Rated 5 out of 5

Easy Hot Water. Good value water heater and easy to install. Works well.

Rated 5 out of 5

I installed a Duoetto 10 litre hot water system in our Jayco Eagle Camper Trailer and we have had several trips using it in both 12volt DC and 240volt AC.

I installed the unit under the front lounge just inside the side access hatch near the front door. This location has proved itself by being able to access the power switches without having to lift the cushions. The inlet plumbing may seem to be a bit technical, but is really simple.

The 240 volt proved very efficient with piping hot water, and controlled by an internal thermostat. The location of the outlet beside the door made it very accessible to get water for washing up.

Our 12 volt system comprises of two 125 Watt BP solar panels, a PL20 regulator and two 120Ah AGM deep cycle batteries. The 12 volt power for the Duoetto is controlled by a switch (black) which turns the unit on and off when required. This have proved successful when stopped for morning tea or lunch turning the hot water on for 20 minutes. This meant the water was hot enough when we camped, eg to have a shower but not enough for washing the dishes. We used a portable shower and a bucket. We do not turn the unit on after 2pm while we were camping to conserve battery power for the evening.

The only times we were unable to use the Duoetto on 12 volt was when it was raining or very overcast days. We also have a Yamaha EF1000iS generator which heats the water in the Duoetto on 240 volt. This works extremely well and after 30 minutes the water is too hot to place your hand in the water.

We are able to wash the dishes and then have showers in the one heating. We are very happy with the Duoetto Hot Water System.

Add a review