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250 Litre Gas Boosted Solar


  • Hills Evacuated Tubes have passed the AS/NZS 2712:2007 Standard Freeze test to -15o.
  • Hills Evacuated Tubes have passed the AS/NZS 2712;2007 Standard testing for hail resistance.
  • Hills Evacuated Tubes are highly manufactured from high quality Borosilicate Glass and have a 10 year warranty.

Hills 250 Litre Gas Boosted Solar Hot Water System

Hills Solar Hot Water System

Climate change due to greenhouse gas emissions presents and immediate and growing threat to our fragile plane. The sun provides a limitless source of free non-polluting energy every day. A Hills Solar Evacuated Tube Hot Water System can efficiently capture this free energy and provide you with savings of up to 80% on your hot water heating costs. Considering Australia is one of the sunniest countries on the planet it makes sense to utilise this resource by installing a Hills Esteem Solar Evacuated Tube Hot Water System. Not only will you save money but you will also reduce your famil’s CO2 eminnsions by up to 3 tonnes per year.

Electric Boosting

Hills Solar offers gas boosting using Bosch continuous flow gas booster, 21e on all GB250 Systems to ensure a continual flow of hot water on low thermal days . When water below 60°C is drawn from the tank, the gas booster will boost the water temperature to 60°C ensuring that ibly the water drawn is heated; therefore, saving energy.

Evacuated Solar Tubes

Evacuated tube technology delivers significantly better performance than traditional absorbers on the market today. Their advanced design incorporates tubes that consist of 2 layers of borosilicate glass with a vacuum layer between them . The vacuum acts like a thermos flask, retaining up to 97% of the thermal energy, resulting in an increased efficiency.

The SUn’s solar energy is then transferred to the manifold via the heat pipe located in each tube. The small amount evaporative liquid in each tube is super heated by the sun’s solar energy and forms into a vapour. The vapourrises to the top of each pipe. Heat transfer then occurs between the pipe and water passing through manifold . The water is then transferred to the tank. The cylindrical design of the tube s ensures effective collection of the sun’s solar energy throughout the entire day.


Warranty Parts Labour
Tank 10 years 1 year
EST Collectors 10 years 1 year
Electric Booster Element 1 year 1 year
Electrical Components 1 year 1 year
Pump 1 year 1 year
Mounting Frame 10 years 1 year
Numbers of RECs for an installation per zone 10 Tube Collector 22 Tube Collector 30 Tube Collector
Zone 1 – 315L Electric Boosted 14 24 30
Zone 2 – 315L Electric Boosted 13 24 29
Zone 3 – 315L Electric Boosted 14 24 30
Zone 4 – 315L Electric Boosted 11 20 25
Numbers of RECs for an installation per zone 10 Tube Collector 22 Tube Collector 30 Tube Collector
Zone 1 – 315L Electric Boosted 14 24 30
Zone 2 – 315L Electric Boosted 13 24 29
Zone 3 – 315L Electric Boosted 14 24 30
Zone 4 – 315L Electric Boosted 11 20 25