I think I used farm output last time, for 99% of it. 1% was from a connected "dump stuff you don't want into here" chest.
How does your MFSU factor in there?
I may just end up using MFSUs in parallel to feed my base. Its easier in series to gauge how much you have, but in parallel you can send out more amperage.
I wonder if there's a way to "add" redstone signals. If I have, say, 4 MFSUs, each with an energy detector, I can turn on my generators when the total redstone signal is too low. Alternatively I could just turn them on when "any" signal is too low, that would work too.
I guess I have a solution, I just wish it were a GT one.