... , CCC, ISO9001:2000, Solar Keymark certificates. How They WorkSolar power systems include storage tanks and solar collectors. There are two types ... of solar water heating systems: active, which have circulating pumps and controls, and passive, ... FAIR October 15-19, 2010 Guangzhou We, Changzhou Erjin Solar-Energy Equipment Making Co.,Ltd, are established in 1989. We ...