Thank you so much, Russel. :-) I heard an EE professional say this: "You can't just store the energy from= solar cells back into the grid. That's just EE (or did he say solar energ= y) 101!" I assume this takes into account you have a winding road going th= rough both populated and non-populated areas, the distance between that and= a particular place to feed it to the grid*, and the energy loss. * There seems to be this perception that you just connect the solar road po= int by point along the way to power-line poles and it just feeds back into = itself. That doesn't seem right. -Lindy --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .