mini solar water heater1.nice design,firm frame.2.high quality,competitive price3.fast delivery4.high efficiency mini solar water heater,vacuum tube solar water heater,non pressure solar water heater1) The vacuum tube adopts the three-layer heat coll..See more

working principle:The selective coating on the inner cover of the evacuated tubes converts solar energy into heat energy and water in evacuated tubes absorbs the heat. When temperature rises along with density drops, and weight goes down, hot water w..See more

working principle:The selective coating on the inner cover of the evacuated tubes converts solar energy into heat energy and water in evacuated tubes absorbs the heat. When temperature rises along with density drops, and weight goes down, hot water w..See more

working principle:The selective coating on the inner cover of the evacuated tubes converts solar energy into heat energy and water in evacuated tubes absorbs the heat. When temperature rises along with density drops, and weight goes down, hot water w..See more