hmmm, interesting.
lots of power storage? I think not! This works better before rain stopped solars, but it could still work.
I am not up to date with energy conversion mods, as it is quite fun to use oil and fuel from bc, but here goes.
Back when I used to feed 32EU/t into a converter for my quarry, (plenty enough power) I would set it up with around 64 solar panels. And enough storage for the production of 32 of them for during the day.
This way, during the day, a MFE would fill up with the excess power (as a batbox would be the power limiter ) then it would discharge during the night. Technically you only need 58 or so due to the day lasting longer than the night, but with rain affecting them now, you might need a few more, and a bit more storage.
A bigger pressing problem I would have if i were to do mining on that scale would be storage of everything. massive chests, and you should have automatic maceration and smelting set up, as you could then turn all the ingots into their bricks to save space, using the BC autotcrafting.