Solar Hot water Using the suns energy to heat water, is the single most energy saving action that a household can undertake. It represents a reduction of greenhouse gases equivalent to taking a car off the road! Solar hot water can reduce your household hot water bills by 70-90%, a saving of around $300-400 each year (based on an average family). Find out which system is best for you. To register email: or simply call (03) 9480 1905