suppliers could have a higher level green certification tarif where they genuinely provide all the energy real time from green sources -
so when wind/solar not matching customer demand they have grid battery storage that is discharging to make up the shortfall (which itself was charged from wind/solar).
might be expensive per unit or need tou tarifs but must be businesses/individuals who are rich enough, and want the kudos.
LOL.
I am sure there maybe be one or two who would do it, but it would be far better to be done at local level than grid.
Would make literally zero commercial sense to only charge grid usage from green. Its best utilised to accept green or non green but to reduce/eliminate the most polluting. Eg eliminate coal/oil rather than modern gas generation.
FWIW Octopus already tell you when the grid will be green or not so you can flex your demand based on that, should you choose to.
I think the whole conversation was dumb to be honest.
There is basically no time (yet, its coming) when the grid is fully green.
There are many reasons why, but the most obvious is that its not a single entity, its a massive infrastructure project, that cannot simply take green in at unlimited amounts in one location and spit out in any other location.
It has to be managed and it has limitations.
The simple key fact is that if you sign up for a green tariff or green supplier the total amount that they buy or produce will come from green sources.
It basically irrelevant if thats real time, its just load switching in regards periods for now.
No one in their right mind has any thought that that right now, at consumer level, in real time will be your ringfenced green.
There will come a point when they would not be able to make the claims since the grid itself has the limitations that for that customer they cannot be fully green in affect when added as a marginal consumer on top of all the other who are signed up for green
We are not there yet, but it will likely come.