There is some other interesting economics at play. Solar is more suitable for local, small scale production for a few reasons including relative costs and the way those costs are distributed (capital cost vs variable cost).
That in itself is interesting for all sorts of reasons, many of them applying to countries like India with infrastructure difficulties.
About 7 years ago I visited Cow Bay, north of Cairns, Australia and past the end of the grid (it ends at the Daintree river, I think). All the B&Bs, houses, hotels and such were running on Diesel generators. Smelly, noisy... People turn them off at night. I wonder if solar has replaced much of this yet.
If local solar reduces the need for power infrastructure in areas where marginal costs are highest, I wonder if the economics of grids changes in some sort of useful way generally. Maybe the cost savings in marginal infrastructure reduce overall costs meaningfully. If governments (or the quasi independent private energy players) are too broke or disfunctional to provide good central power, there's an alternative. When telcom infrastructure was simplified by mobile, that had a big impact in places that never had wired infrastructure in the first place but got mobile phones.