What mode should i set my iStore to?

For Australian conditions ECO mode is the best, the onboard computer monitors the surrounding temperature, incoming water and outgoing water, heat transfer capabilities and adjusts its operation to suit. The Federal Government Clean Energy Regulator species how all of the iStore compressor hot water systems must operate in Australia and as such how the computer control operates. Intelligent and Hybrid modes are for overseas models and effectively overridden to ECO mode in Australia.