Australia has a very wide range of weather conditions and as such the Federal Government Clean Energy Regulator (CER) insists that water heaters like the iStore must be tested in everything from 0 degrees up to over 30 degrees ambient temperatures. During a heat cycle the iStore in fact undergoes a large range of heating as the water entering the tank can be below 10 degrees and the target is 60 degrees.
The iStore achieves an average COP of 4 over the testing required, this means that for every 1kw of electricity consumed that 4kw of heat energy is imparted to the tank water.
