The M-shaped water channel for solar mounting systems is designed to manage and direct rainwater away from the solar panels and mounting structure. . How do roof mounted PV solar panels work? Roof mounted PV Solar Panels are typically supported by racking systemswhich come in two basic forms. For example, roofs with a pitch of 30 to 45 degrees often perform well for solar harvesting. Rainwater naturally cleans. . The PV Waterproof Rail is made of high quality ZAM275 material with the performance of high load-bearing, wind resistance,ensure the safety of solar panels. This is the best way solutions to solve the problem of water leakage in distributed. . I'm gearing up to add a solar array to my roof and have drafted a simplified wiring diagram (see attached image). I plan to use 215W Evergreen ES-215 PV panels with a MagnaSine 4.