If you make 5x5x5 cube of power generators, it will only give you 4912 e/sec. That is half the power than OP\'s design. Good work.
I also just tried the checkerboard pattern, where all 5 layers are same:
XOXOX
OXOXO
XOXOX (where power is X, O other)
OXOXO
XOXOX , resulting in only 7846 power...