Position, shape.
1. Position, according to the instructions of the wall-mounted solar panel, we can know that the upper side of the side outlet is the middle inlet pipe, and the lower side is the middle outlet pipe, which is very easy to distinguish.
2. Shape. According to the national unified wall-mounted solar performance regulations, the middle inlet pipe should have a circular shape, which can greatly reduce clogging, while the middle outlet pipe is triangular, which is convenient for facility.