Is it expensive? Is Huangming's after-sales service good? ····· This is absurd, I guess the people on the second floor are from Huangming. Your statement is too extreme~ Of course, I am not saying that Huangming's products are not good, but the after-sales service is. what Huangming wants. Reinforcement, and Huangming's products are generally not expensive~
The choice depends on the diameter of the collector tube, and the heat-absorbing coating generally has two specifications, one is. 47mm, and the other is 47mm. If you're going to put it together, you can say 47 tubes or 58 tubes. The Huangming solar power you mentioned should be 58 tubes. The water production capacity of each tube can reach 10L per. day. I don't know about the Huayang one, but it's definitely not as good as the Huangming one, but 24 tubes should be able to produce 190L. The worst collector tube can usually produce 6-8L of water.