I’ve bought this (Amazon link). $417.
DJI Power 1000 Portable Power Station, 1024Wh LiFePO4 Battery, 2200W (Peak 2600W) AC/140W USB-C Output, 23db Ultra-Silent, Solar Generator For Home Backup.
A lot more energy than an UPS. Should keep the refrigerator, the network, and a fan running maybe 12...