Issue description:

It seems like the energy gets drained from your machines.

Suggestion:

Make BaseEnergyStorage#canExtract returns false and/or BaseEnergyStorage#maxExtract to 0

Version:

• Minecraft: 1.14.4
• Forge: 28.1.96
• Refined Storage: 1.7.1

Does this issue occur on a server? [yes/no]
Both Sides

Please be more clear in future reports :)

From what I understand it's possible to extract energy from the Controller and the suggestion is to prevent that from happening?

Yes that's exactly what happening . :)