I run an IC2 server, and we're encountering a bug where the mass fab consumes power when everyone is logged off. I've tried using a splitter wire to cut power to it, as well as applying a redstone signal directly to the mass fabricator. In both cases, a solution that successfully shuts off the mass fab while we're logged in, winds up sapping power constantly the moment we log out - and we don't get any mass for our trouble, either! This is a huge issue for my server, because I've rebalanced power generation, and eliminated renewables. All energy is based on fuel, and so accumulating a lot requires a lot of work. So finding out your MFSU is totally drained, and having no idea why, is significant. Thankfully we have a workaround in that we can just cut the wire completely, which seems to stop the loss.
My experience aside from this small blip has been that your mod is incredibly solid and I want to thank you so much for the hours of enjoyment. Great work!