At Solar Pumping Solutions we supply the latest technology in solar hot water. Hills Esteem Solar Hot Water Systems are Clean and Green using highly efficient evacuated tube technology saving you up to 80% or better on water heating costs. Evacuated tubes have passed the AS/NZ 2712:2007 standards for both hail and freeze resistance to minus 15 degrees C without the need for a heat exchanger or glycol (antifreeze chemicals) making them extremely effective in cooler climates. The durable stainless steel tanks offer natural gas, LPG or electric boosters to ensure hot water is always available.
Please see a selection of available systems at the links to your left, or contact us for custom jobs and quotes.
Energy Output Comparison Graph
For detailed testing results on our solar efficiency levels please click here

(Cosine adjusted) (Tm-Ta=40K G=800W/m2)
Performance testing
Performance testing was conducted by the University of Otago, New Zealand showing very positive results with evacuated tubes over and above other types of solar hot water systems, particularly for colder climates.
"...It is also clear that evacuated tube systems need to be taken into serious consideration as a preferred system type, especially for the cooler parts of the country...."
"...From a straight dollar return on investment, it is difficult to recommend any kind of flat panel system at this stage..."
For a full summary of the report please visit: http://www.alphaheatingandsolar.co.nz/acatalog/Which-solar-water-heating.pdf
How the Hills ESTEEM TM Solar evacuated tubes work

Most Australians are familiar with flat plate technology when it comes to solar heating of water. Evacuated tubes are not as new as you might think, in fact they were developed over 30 years ago by an Australian at the University of Sydney! The technology was snapped up by Europe for very obvious reasons - it works extremely well in the cold!
The Hills ESTEEM TM evacuated tubes are long glass cylinders - these rounded surfaces mean that no matter what time of the day, they face the sun and as long as there is light in the sky the evacuated tubes will be absorbing the sun's energy, in contrast to a flat panel which will only reach maximum efficiency in the middle of the day as well as sustain considerable efficiency loss due to reflection off the flat glass panel.
The Hills Hills ESTEEM TM evacuated tubes have reached efficiency comparisons in winter of up to 160% greater performance than a standard flat panel!
Click here to go view independant efficiency comparison graphs.
The Hills ESTEEM TM Solar Evacuated Tubes consist of a double layer of toughened glass with a vacuum between the 2 layers - similar to a thermos. the tubes are capable of retaining up to 97% of the energy absorbed from the sun. Efficiency of the collector is not affected by the ambient temperature and the cold whereas a flat plate collector is susceptible to freezing at low temperatures.
As a result, the Hills Solar evacuated tube solar collector is the perfect system for very cold areas being frost protected down to minus 40 degrees Celsius.
The Hills ESTEEM TM Solar Evacuated Tubes are perfect for all areas of Australia including alpine areas with an Australia and New Zealand freeze rating of - 15 degrees for a 10 hour period. In fact they have been used in much colder situations.
The energy from the sun that is absorbed is transferred to the water via copper heat pipes running down the centre of each tube. A small amount of water is inside each heat pipe which is turned to gas from the heat, the gas rises to the top of the heat pipes, which transfer the heat to the water through the manifold on the top of the collector. The water is then pumped to your water storage tank.
The Hills ESTEEM TM solar hot water system boasts the highest efficiency rating of any equivalent sized system on the market either flat panel or evacuated tube.
Split System Design no more tanks on the roof
A Hills ESTEEM TM Solar Hot Water Systems is a ‘split system' meaning no tank on the roof. Hot water is stored in a well insulated, marine grade stainless steel tank at ground level. If your tank received no external heat input it would only loose approximately 1 degree in temperature over a 24 hour period.
All tanks come with a booster for backup - either electricity, LPG bottled gas or natural gas. Your system will achieve 80% or better heating with the sun and on consecutive cloudy days or times with many guests you know you can rely on your booster.