We’re assuming your off grid house is a new build.
If that’s true, and you want to minimise the size (and price) of your off grid solar system, you only have a few options.
They are: solid fuel (wood burner), gas, and diesel boiler.
With the exception of a wood burner and gas heating, any other options could have large upfront costs.
Everyone’s different, so what suits you will depend on your goals, priorities, funding, climate/location and attitudes.
The majority of customers who want their off grid system to heat their home will choose an air-to-air heat pump. These deliver the ‘biggest bang for buck’ when it comes to kWh in vs energy out.
All heat pumps need to be correctly sized for the room’s function, size (volume of space) and other factors, but this is especially true with off the grid living.
While it won’t matter too much in a grid tied home, an undersized heat pump that chugs along all day in an off grid home, will deplete the battery fast. Likewise, an oversized system will simply consume too much energy.
There’s a balance to get right.
Large ducted heat pumps that feed multiple rooms are more prevalent in new builds, but they come at a significant power cost (kWh). Sometimes it is more energy-efficient to have single heat pumps strategically placed, than to run one giant system.
All heating methods have costs and they are not always financial. For example, a wood burner may mean a smaller overall off grid system, but there’s an ongoing cost for fuel, your time, and the environment.
A heat pump (or hot water heat pump), will mean a larger off grid system upfront, but the ongoing cost is minimal – including the cost to the environment.
It’s your choice, and we can help you through the options.