Ask HN: What's a good electrical UPS for a home dialysis machine?

What does the manufacturer of the dialysis machine recommend? (Either specific brands/models, or generalities about the quality of power needed by their machines.)

In many areas, "power failure, and resident needs power for a home medical device" is a situation that the local Fire Dept. / EMS / Utility regularly handles, or has protocols for. I'd check with them. If nothing else, if things really went sideways and they were responding to your FIL's home, having a UPS that they were familiar with could be a real benefit.

The requirements have been brought down to 1200VA so the APC SMX2000LV (2000VA) seems to be a good choice for UPS. It's much cheaper on Amazon too.

There's a company called mediproducts that offer UPS units for medical equipment but their pricing is opaque at the moment.

Ideally I'd love to chain an affordable battery backup solution like EcoFlow or Anker Solix along with a good APC UPS. But I'm concerned about chaining two sine wave generators (they become sine wave generators when there's a power outage). But I have no clue if that causes any cascading issues or not.

I mention this because your loved one might be better served by an actual design rather than generic suggestions and construction rather than shopping. I mean this is kind of life and death. Good luck.