@larsman - All snide comments aside, many audiophiles care about battery back up systems for one reason or another. Either in case of a power outage or as a way of getting cleaner and more stable power than they can get from the power lines.
Whether that’s to run a turntable, streamer or SACD player power still matters. There’s currently an active thread about buzzing while on audio power so clearly the topic is relevant to many here.
The main reason for starting this thread was to point out just how incredibly expensive a UPS was for some of this. Of course, it's not as expensiave as an F-150 truck, but still, I was not aware until very recently how much better your average battery generator was or a DIY solution. I think the DIY solution I'm doing is like 10x cheaper per minute of runtime than the average UPS.