What most people forget about Solars is, that they produce INFINITE Energy for doing NOTHING. You just plomp them down and then you get about 256EU/t on average FOREVER. That's ruining the whole Fun of having a large Powerplant going, as this SINGLE Block, which can even be hidden Underground, will produce more than you need.
Well with the cost change of this one with your matterfab by the time I can make them I won't bother because I will already have a couple of powerplants capable of producing somewhere around 1-2k Eu\tic anyway. Only reason I ever made any solar panels was to stop my generators of various sorts from constantly flicking on\off due to the standby power requirement of the Adv Machines, I don't personally like solars or any of the greengens I much prefer other complex system driven methods of generating power.