The Envirosun TS Plus 300 litre, open circuit 2 panel thermosyphon solar hot water heater is a superior made hot water unit, with the roof mounted storage cylinder that is manufactured in Holland from a very high grade 444 Stainless Steel for a longer life expectancy, this is imported to Australia as a bare tank and is all assembled in Victoria. The Envirosun TS Plus comes with 2 high solar absorption solar collector panels. These solar panels have one of the higher solargain / heat absorption rate in Australia over 20% higher than most other brands for solar hot water systems on the market.