Choosing a caravan hot water system is not simply a matter of deciding between gas and electricity. The right option depends on where you camp, how long you stay off-grid, your available power, water capacity, installation space and how many people need hot water.
A system that suits regular stays at powered caravan parks may be frustrating when free camping. Likewise, an off-grid system may add cost and complexity that a mostly on-grid traveller does not need.
This guide compares gas, electric and combination caravan hot water systems so you can narrow down the most practical option for your touring style.
| System type | Usually best suited to | Main advantage | Main consideration |
| Gas | Free camping and touring away from 240V power | Uses LPG instead of relying on a powered site | Requires a compliant gas installation and available LPG |
| Electric | Frequent stays at powered caravan parks | Convenient when connected to 240V mains power | High electrical demand can make battery operation impractical |
| Gas and electric | Travellers who alternate between powered and unpowered sites | Greater flexibility between energy sources | May cost more and require more installation space |
A gas caravan hot water system uses LPG to heat the water. Depending on the model, it may use a storage tank or heat water as required. Some gas systems still need a 12V supply for ignition, controls or fans, so the specifications of the selected unit matter.
Gas is often attractive to travellers who spend time away from powered sites because it avoids the large 240V electrical load associated with many electric water heaters.
Electric caravan hot water systems use electricity to heat the water. Many are designed around a 240V supply and are most practical when the caravan is connected to mains power at home or at a powered caravan site.
It is important not to assume that an electric water heater will run effectively from a standard caravan battery. Heating water requires considerable energy. Battery operation may require a suitably designed lithium battery bank, inverter, charging system and solar capacity, and even then it must be assessed against your total energy use.
A combination caravan hot water system provides the option of heating water using gas or electricity. For many touring owners, this is the most flexible arrangement.
You may use electric mode at a powered caravan park and gas mode when camped away from 240V mains power. Some models may allow both energy sources to be used together for faster recovery, but operation varies by product and should follow the manufacturer’s instructions.
An electric or combination system may be the most convenient. You can use the site’s 240V supply and avoid consuming LPG unnecessarily.
A gas or combination system is often more practical because heating water from batteries requires substantial stored energy.
Electric operation may be possible with a carefully designed lithium, inverter, solar and charging system. It should be assessed as part of the caravan’s complete energy budget.
The new unit must fit the existing compartment or proposed location, with suitable access for servicing.
Replacing one model with another may require changes to the external opening, plumbing, electrical supply, gas line or flue arrangement.
Hot showers use both water and energy. Tank capacity, pump performance and the number of travellers all influence the result.
For electric heating, consider shore power, battery capacity, inverter output, solar input and other appliances operating at the same time.
Any installation, alteration, repair or servicing of the gas system must be performed by an appropriately licensed person.
Choose for your normal touring pattern, not a once-a-year scenario. The best system is the one that works where you spend most of your nights.
Buying a unit before checking the available space, services and energy supply can turn a straightforward upgrade into an expensive problem.
AllBrand Caravan Services can inspect your existing setup, discuss how you travel and recommend suitable gas, electric or combination options for your caravan or motorhome.
Or call (07) 3869 2969 to speak with our team in Brisbane.
Neither is automatically better. Gas often suits free camping, electric suits regular powered-site use, and a combination system provides flexibility for travellers who do both.
Possibly, but water heating uses substantial energy. You may need a suitable lithium battery bank, inverter, cabling, circuit protection and charging capacity. A standard battery setup is often insufficient.
Solar panels do not normally power a high-demand water heater directly. They recharge the battery system, which may then supply an inverter. Whether this is practical depends on system size, weather, battery capacity and other loads.
It can be worthwhile if you alternate between powered caravan parks and unpowered camping. It lets you choose the most practical energy source for each location.
Heating time varies by system type, tank capacity, energy source, starting water temperature and model. Check the manufacturer’s specifications for the unit being considered.
Sometimes, but the replacement must suit the available space, wall opening, plumbing, gas, electrical supply, ventilation and flue requirements. Modification may be required.
Gas installation, alteration, repair, servicing and certification must be completed by a person holding the appropriate gas work licence or authorisation.
AllBrand Caravan Services can assess, repair, replace and upgrade caravan hot water systems at our Brisbane workshop. Call (07) 3869 2969 or request a quote online.
