... liquid of glycol, can resist low temperature ≥-35°CFrame optional angle0°,25°,38°,45°Capacity of water tank80L,100L,150K,200L,250L ... other.Electrical heaterWith power of 1500W,2500W,3000WHeat preservation layerhigh pressure automatic polyurethane foaming layer with thickness of 45-50mmHeat preservation hours48 ... 500L.Please ask the information from our sales men. Split Pressure Solar Water Heater