When radiant energy is low as a result of cloud cover or rain, the Hills ESTEEM™II and Hills EXCEED™ utilise gas or electric boosting to ensure you’ll always have hot water.

Hills ESTEEM™II and Hills EXCEED™ gas boosted solar hot water systems use continuous flow gas boosters, delivering up to 20 or 26 litres of hot water per minute.

Hills ESTEEM™II and Hills EXCEED™ electric boosted solar hot water systems ensure the water is maintained at 60°C.
The system comes with a standard 3.6kW bottom-heating element however, this can be changed to a 2.4kW or 4.8kW element if required. Clever positioning of the element at the bottom of the tank ensures you’ll have a full tank of hot water available all year round. Some states offer a lower tariff on electric boosted hot water heating.