Charge-o-mat can accept and display power correctly but will not charge any items placed inside its inventory. Tested with individual items in each inventory slot and all slots filled.

Tested on Minecraft 1.14.4
TechReborn-1.14.4-3.0.17+build.250
RebornCore-1.14.4-4.0.19+build.187
fabric-loader-0.6.2+build.166-1.14.4

No other mods loaded