Didn't realise it was you. Was coming here to post the question and answer that Elo posted:
Question:
Well I think there's a slight weird problem with RP wires in IC2 v1. The thing is that you can power a energystorage to prevent it from distributing it's energy.
A RP wire on that block does what it should. The weird thing is that RP wires connect to said block but then it doesn't work.
So any idea how that can happen?
You mentioned an rs flag somewhat earlier when someone said jacketed wires won't connect to BTW's light blocks but I guess since it connects that's not the issue in this case, I guess?
Answer:
Yep, that just means that the energy storage unit only turns off when it receives strong power, despite setting the connection flag. Nothing I can do, that problem is on the IC² side.
RedPower is a lot pickier about these things than regular redstone, so it's easier to see when they don't quite work right with RP wires.