Until you put up your solar and then power is almost free...

The amortised cost including the panels and labour is nowhere near "almost free".

It is over a couple of years

	▲	vidarh 5 days ago \| parent [-]
		Even if you live somewhere where it does, that is not remotely "almost free", and lots of places the payback period is more in the range of 10-15 years even with subsidies.