Review on ⚡ ANJOSHI 20A 300A Waterproof Inverter 12V 36VDC: Powerful & Durable Industrial Electrical Solution by Bryan Fisher

As you can see after 4 months, these switches are rubbish and the internal connection tab is completely rusted. Definitely not waterproof. had to redo all the clamps as well as the bolts that attach them to rotate freely in the case so I couldn't loosen them with a corrosion binder. I tried to return it under warranty, the tab says 30 days. A lost day on a boat with friends plus the cost of labor replacements. Complete garbage!