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decrepit said..
Instantaneous electric aren't very efficient and use a lot of short surge power. But storage heat pumps can be used off peak, or as you say from solar.
Agreed, but people are happily turning to electric resistance hot water heaters to siphon their excess solar energy into. It may not be as efficient, but its better value than exporting the energy to the grid and then heating water at another time or from another source. If you need to heat water each day and do it cheaply, why not via the PV you already have?
Even when they attempted/announced the ban they seemed to have forgotten that off-peak hot water was one of those things that helped the stability of the grid a bit by being able to absorb some of the base-load.
I think its just one of those things where a direction from government in one area didn't align with government in another area. And why should it as no doubt they get different agendas.