Since this pretty dead and no 1.16.x version in sight, a energy meter in this style would be a nice addition to AdvancedPheripherals. Just a simple block that gives you current throughput values and maybe separate input and output values.
I know about the generic energy peripheral and that the forge energy api is limited somehow. But maybe it is still possible? Just an idea.

I already planned a block like this. I will add this after 0.4b.

Added in 0.4.1b