[nroose]

Sure, the panel is getting cheaper. But transportation, installation, and land are not. It is still likely that panels will be more cost effective than more complicated, expensive installations, but probably either oriented to the sun at noon, and make sure there are as many as possible in that orientation in the space available. And anyway, it would just be half a pyramid. no point in orienting them to the north in the northern hemisphere or to the south in the southern hemisphere.