I bought the Anker Solix C1000 a couple of weeks ago. On the app it says Solix C1000X, although I bought the C1000. Not sure what the difference is, but they seem identical. I came across Anker Solix as I was researching for a good replacement uninterruptible power system (UPS) option for my network/audio/video "cabinet", which has high end network gear, PoE video security setup, as well as audio/video equipment. I am glad that my attempts to search for and aquire a typical UPS had failed, because WOW, these Anker Solix units are amazing. They perform exactly as advertised, and even surpass. I am glad I bought this unit because not being disappointed is always great. The Solix C1000 performs perfectly as a UPS. It is very silent, and looks great. Hanldes any surges from powering equipment on with no issues. I still have an old plasma TV that is 15 years old now (upper TV in the picture), and is very power hungry according to today's standards. The TV does not stay on after a power failure, but can be turned on after the C1000 has switched. I remember this happening with the previous actual UPS units that I had before as well over the years. After a bit of research, it appears that plasma TV's are just very very sensitive, and need an amost instantaneous switchover time, which you would only get with "online" UPS systems, and not the typical "line interactive" UPS systems, which are the common consumer-grade UPS's. There are other similar sensitive electronic equipment that require online UPS's as well. I tested with a newer LED TV (the lower "fireplace" TV in the picture) and the TV stays on after a power failure with no issues. No problems with computers or routers either. So if the electronic equipment is too sensitive, this is certainly NOT the fault of the Solix C1000. Even a line interactive UPS wouldn't keep these types of electronics running uninterrupted. You would need an online UPS system.
I would suggest to set charging power to the lowest (200W) if using as an always-plugged-in UPS and don't need the unit to ultra-fast charge up again. No need to stress the batteries to charge quickly if the unit is being used as a UPS. Also, after some research, always being plugged in and charged to 100% deosn't seem to be as big an issue with LiFePo4 batteries as it is with typical Li-Ion. What I myself will be doing is, a slow drain by unplugging the unit every week or two for a few hours (when it has only a couple hundred watts of load on it), and let it run down to 60% or so. Then plug it back in to recharge with the slowest charging rate. About once a week or two weeks. I feel that this should keep the batteries healthy. Take that for what it's worth...
I have ordered another Solix C1000 with the expansion pack for other needs and emergencies around the house. Hopefully the longevity and lifespan of these units is also as advertised. But from what I have seen so far, I don't see why they wouldn't be. I definitely recommend Anker Solix.