I don't think there is calculus that makes the cost of getting it to space worth putting it there - Elon of all people knows this - if you scale up the ground-based solar and add battery storage, the costs are still far lower than trying to put that in space to gain more hours of usable sun and higher intensity sun... it's just not cost effective until panels are paper thin, weigh nothing and the cost of launches and thus per-ton to orbit gets an order of magnitude cheaper.