[benj111]

Do you think you'll ever be paying 2c/kwh daytime 3.3c/kwh night time including fixed fees?

I would guess not because you also need to pay for the grid, and call centres for when peoples power goes down and debt collection and taxes and all the other costs of business that you wouldn't have as a homeowner.

The actual answer depends on a lot of variables, are you staying on grid, what do you get paid for feeding electricity back to the grid, grants/ tax credits.

So I don't think its impossible that roof top solar ends up cheaper, I might go further, as in the medium term (10 years) theres going to be massive capital spending on the grid, so cost benefits are likely to be seen after that point.