... tank, The water is filled inside the solar vacuum tube, Solar vacuum tube transmit solar energy to heat energy, The temperature of ... CNP2424pcs58mm1800mm360mm470mm250 literDENO1800-CNP3030pcs58mm1800mm360mm470mm270 literDENO1800-CNP3636pcs58mm1800mm360mm470mm300 literSelective fitting: Controller, reflector, Electrical heater, magnesium bar.P.S.1. Controller can display the temperature, water level ...