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The last 28 days above are quite typical. Alternation periods of wind and calm. Currently gas and imports make up the shortfalls.
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Over the last year (as above).
So - The more renewable we generate the less expensive gas we need to buy.
We could generate more wind power but that gives us the problem of what to do with the excess when we get more than we need.
Lots of things are being tried. Pumping water up hill, compressing air, heating sand, batteries, hydrogen.
The problem is that the energy to store is immense and we need to be able to hold about 3 weeks worth. We used to store piles of coal but no more, we used to store gas in gasometers till the IRA intervened. I doubt we will arrive at a one size fits all solution, but we will find a solution. I am very confident of that as there is so much money to be made by those who back the right horse or horses.