Are your batteries toast? Verify if you don't know. I've only seen that when the batteries are well past expiry, it's literally just the batteries running as long as they can.
The standard SLA batteries typically put in UPSs are meant to be replaced every 3 or 5 years, LiIon typically will last roughly twice that or more with proper care.
Do not discount physical security, lock the doors to your house and get an enclosed rack that you can lock
Very neat, very tidy, noctua on the rack. All good things
I've been using LSI SAS 9300-4i4e for my 4u 4 node supermicro server that I begrudgingly need to decommission, wife appeal for the 45u rack is at an all time low and I need to downsize haha
Sas3 capable and they allow for 4 internal lanes and 4 external lanes so you can use them to connect a JBOD to your server using the external 4 lanes. Solid buy for a homelab if you can find any, the ones with external lanes don't come up too terribly often.
My router is x86 linux, so I can just usb tether to my phone like a frugal king.
Figure anything out, OP?