I wanna know who said it was possible to begin with... also I don't remember signing myself up for this yet here I am triple paying for energy as we stagnate ourselves into ww3... wtf is going on!
Its always worth playing with iamkate and looking at what the current power mix is and what it has averaged over the last year and how prices correlate with green energy.
As with everything else, the marginal cost of additional renewable energy and storage will rise. At some point, all the low-hanging fruit is picked; there are only so many locations suitable for wind farms and pumped hydro. It's fallacious to think that the £0.15/kWh price will hold as it gets scaled up to meet more of the demand.
The idea of 'net zero is making energy expensive' is a common but inaccurate catch-cry (I could even go as far as saying 'conspiracy theory' but maybe that's uncharitable), but it is a very convenient one for the oil & gas industry...