Looks like they've been working well over the years. Great to see since mine is still so new at only 6 months. My use case a little different as I was focused primarily on the backup capabilities given how frequent the power outages here are from the storms.

So far, I just love the ATS switching and the fact that no delays in the switchover like we had when on propane generator and would take a minute or two for the cutover, and then again when power was restored. The backup batteries and ATS switch happens so quickly that none of the clocks reset, the network and internet stays up, often without even a flicker... Really love the fact that there is no maintenance needed on the batteries like there is on the propane or gas generators, with spark plug replacements, oil changes, weekly testing, etc. and the like.