4P 63A 110V ATS Automatic Transfer Switch - L1 Priority Phase Selector, 50/60Hz, Din Rail Mount, CE Certified for Public, Inverter, Generator Use

Excelente

I was excited about the digital display showing voltage from each source and Amp Draw. This quickly turned to disappointment as it tripped the GFI on the Pure Sine Wave Inverter and the generator as soon as the shore power is plugged in. The neutrals on the three inputs are not isolated, causing the GFI to trip. Useless! It will trip any GFI on any of your three inputs as long as two or more are powered. This design flaw defeats the purpose of switching between power sources. I went with another brand and have had no issues.

Disappointed that it cannot transfer faster than 1 second, which means your computers/servers will get dumped before it can do the transfer. And they will get dumped a second time when it transfers back to the preferred power source upon restoration of power. Aside from that, it works fine.

1,Works ok the transfer is extremely slow even after adjusting it to the fastest setting. 2, fails to operate at 63 amps 17 was the most it would carry.