There would need to be a massive oversupply of energy to make a distributed model work since you can't share the excess you have or get extra when you need it.

There would need to be a massive oversupply of energy to make a distributed model work since you can't share the excess you have or get extra when you need it. I don't think people would be happy moving to a battery-only model where if their power usage spiked they were SOL until they installed more solar. And that's assuming everyone has the space to install enough solar; residential high rises certainly wouldn't be able to power themselves unless they coated their sides with solar panels, and that may not even work in dense neighborhoods. Unless the whole solar + battery kit was significantly cheaper than grid solar, not just on a per watt basis, but with all the overcapacity you need for fluctuations to not be brutal, I doubt the predominant model will be distributed.