In india, atleast in my state, they let us add solar to our roof and let us give excess energy back to the grid. And they pay us back for the energy that is sent back to the grid
I believe that is such almost everywhere in the world. Alternatives for excess of energy tend to be much more expensive, unless there is no grid to connect to.
Places where they happens a lot run into issues since the sun doesn't always shine when people want power. People generally want to have a power bill of zero after installing these, but that cannot work out - they still need to pay for their share of the grid, plus whatever plan the grid as in place for nights. Depending on how many are doing this, it is possible to be in a point where there is more power than needed on the grid.
That's common on places where there isn't a lot of solar back-feeding the grid. When the amount gets big enough, it short-circuits the grid's cash-flow way before it becomes a nuisance electrically, and the rules change.
In Germany I believe the tradeoff is that you don't need to do any paperwork with your grid operator when you add a balcony powerplant, but then you're not reimbursed for the power you sell either. If you would do the paperwork, you would be paid with the excess power and could install bigger plant too. The _balcony_ implies that this is for small scale.