So far i think alblaka havent said anything about it, and Solar arrays arent OP because they generate too much energy or because the materials are not expensive enough, its because you compress 512 Blocks (From the placed solar panels) + Who many other blocks of space from the tin cables.
Thats a pretty big issue because it destroys what balanced the solar panels flowers (Having a clear view of the sky, placing them in good spots, and wiring them correctly), with solar panels arrays you just need to place one single block and not bother with it again.
He actually said he consider it in his blog