Tata bp solar india provides hot max solar water heater. Using evacuated tube technology, hot max is designed with specially coated glass tubes to deliver superior performance that ensures availability of hot water even on partially cloudy days. The twin-pro advantage provides double protection against harsh climate conditions. By reducing electricity bills significantly, hot max adds value to life everyday. Hot max has high quality tubes made from borosilicate glass. It can withstands hail storms no clogging/choking with long lasting inner coating of tubes which consists of layers of copper, stainless steel and aluminum nitride. Hot max heats water to a very high temperature it has high quality puf insulation for maintaining high temperature of water inside the tank. The end caps are made from uv resistant abs plastic which enhances aesthetics of product. Powder coated support structure for long life, compact and light weight , easy to install, operate and maintain; and works efficiently with hard water with hardness up to 600 ppm.