I did that for a couple of years at my last house. The feed-in tariff (before the Tories scrapped it) meant that over the whole period I effectively got my electricity for free.Thing with UK electricity is that we can go net zero and lower the costs. We are an Island surrounded by water (for hydro electricity generation) and Wind. We also have a fair bit of sun surprisingly. There is no excuse to not use renewable energy. Be that batteries and solar at home or using electricity from wind farms.
I am currently looking at batteries for the home. Solar to follow. The reason I will do it in that order is that i can buy for about £7k batteries that will power my house for about 24 hours. With the tariff I am on with Octopus, I can charge them at 7p/Kwh and then flip over to them when the costs rise. I wouldn't then pay more than 7p for my electricity. If I added solar, I could then either charge them for free or export my electricity back to the grid.
And before the usual suspects start, the panels work even on a cloudy day. If I had the money I would do the same on my current place. The government should make it a requirement under the new planning laws that every new build should have solar panels and an air source heat pump. Communal ground source pumps would be another option.
There really is no need to use fossil fuels for domestic purposes nowadays.
