This is the future - green energy (solar and wind) is weather dependant and generation variable.
With smart meters it charges can reflect current demand and supply dynamics. The benefits will go to those who can fully optimise their own consumption.
Surplus energy at low cost could charge domestic batteries, switch on appliances to operate when prices are low, charge the EV etc.
A few pence saved here and there may seem trivial - but over a year the IT and systems literate may save a large part of their total energy costs - possibly £500+.
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