Describe the bug
Quote from this issue
GTModpackTeam/GregTech-Expert-2#44

Put on the top of machine -> Can generate electricity.
Put on the top of Battery Buffer -> Cannot generate electricity.
Put on the Machine Hulls -> Can generate electricity.
Put on the Transformer -> Can generate electricity.

Versions
Forge: 14.23.5.2860
GTCEu: gregtech-1.12.2-2.1.4-beta.jar
Modpack: GregTech Expert 2

Setup
SP/MP
New world generated

Steps To Reproduce
1.Put a Solar Panel on a battery buffer filled with batteries
2.It does nothing

Expected behavior
The Solar Panel charges batteries

Screenshots