... heat pipe and the aluminum fins, the solar water heater can get the energy quickly and have a high effiency ... system can be used for seperated pressure solar water heater.Insulation:35mm polyurethane foam and 25mm aluminum silicatesupport material: ... 200L,250L,300L,400L,500LHeat collector working temperture: -35-200Electrical heater: 45-65hotwater temperature: 50-75Pressure-endure ability:0.6MpaThe ...