> I am not sure what author is trying to hint. But solar does not need artificial subsidies, and can pay for itself!

At grid scale, yes.

For the house, not so much.

The feed in tariff was at one point 41 pence per kwhr which is probably £10 a day in summer.

but at 12p a kwhr it drops to £3.6

However, 10kwp of panels is ~£1800, but the micro inverters needed to drive them are >£3k (as its outside you can probably use two larger inverters.) Then mounting system is probably a good 800 quid too.