For BloodAsp: I suggest putting that there's an amp limit of 2 in the tooltip. This is very counterintuitive.
My assumption was the opposite of yours, I thought energy hatches had a limit of 1 amp, like most machines.
Fortunately, the Feed The Beast page on the Electric Blast Furnace talks about the 2 amp demand, and warns about the dangers of only using 2 LV hatches.