Finally got around to replacing my small but expensive APC lead-acid based UPSs with one larger LiFePO4 self-built system. Has about 10 hours of capacity and the advantage of being able to take advantage of cheap electricity.
Cells and case from
#fogstar, BMS from
#JBD, Inverter/charger and battery monitor from
#Victron and powered by a
#raspberrypi running
#venusOS.