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Energy storage - especially in "electric in electric out" form - is either pretty expensive - and/or inefficient - even at scale. Which is why heat store for central heat is getting research in many nations as an alternative use of solar and low daytime demand generation potential.
And iirc the local distribution network is already the least efficient part of the network - losing a multiple of NG voltage levels transmission's losses (by factor of 3 or so iirc in the overall c 8% iirc). Shifting power through part of it twice will only make it even less efficient. Still a loss arguably better than a waste.
But there is a reason UK has been doing renewables on the cheap for decades - the shear cost of energy storage.
Think how much a domestic battery costs - and multiply to cover currently c14% of homes in some regions already.
As long as it's the solar exporters paying via their export rates - feel free to suggest it to the DNOs - space permitting.
