To do the comparison, it should be compared roughly with the cost of building (batteries + traditional solar). I say "roughly" because batteries can do more th

To do the comparison, it should be compared roughly with the cost of building (batteries + traditional solar). I say "roughly" because batteries can do more than levelize solar, they can levelize other intermittent sources as well, and can provide power on foggy mornings and/or evenings, while vertical solar cannot.