110V 2P 63A MCB type Mini Dual Power Automatic Transfer Switches Toggle Controller Change-Over Switch ATS Self Cast Conversion

I purchased this switch for my boat as a way to automatically switch from shore power to inverter power. If should e power back feeds to the inverter, it can, and likely will destroy the inverter. This switch isolates the two power sources and eliminates that possibility. The instructions were NOT easy to understand, but using the continuity tester function on my multimeter, I was able to determine the wiring possibilities and decide which one I needed for my application. I have shore power (neutral and hot) coming in on the “N” on the top left and the inverter power (neutral and hot) coming in on the “R” side which is the top right. On the bottom left (“N”) I have the neutral and hot wires (usually white and black respectively) going to the electrical panel where the shore power used to attach.As it states in the description, the switch will NOT turn on a generator, in my case, the inverter, but once I am disconnected from shore power and press the button to turn on the inverter, with the switch in the “auto” position, it switched automatically to connect my inverter to the AC power system on my boat. Please note, I had to disassemble the switch in order to re-align the internal switch mechanism connected to the external lever in order to get the switch to turn one side on while simultaneously turning the other side off. When I unpacked the switch and tested the manual operation, it turned only one side on and off. Once I was able to reposition the bar in between the mechanical switch levers on each side, it then functioned properly. It must have come from the factory in that improper configuration, but I discovered the problem when I was using the continuity tester to figure out how to connect the wires. Fortunately, the switch comes apart fairly easily, and with a little patience, I was able to correctly align the mechanism and reassemble the switch. I hope this helps the next person who buys this particular device because it is inexpensive, and winds up scratching their head when they try to interpret the instructions.