There's a limit to the 'energy' the system can store: the amount of heating that can be pre-buffered and used effectively later.
This comes with the downside of leaking energy a lot faster than batteries. Moreover, the more energy stored, the faster the leakage.
All that is not to say this is useless. Just to say the role played by heaters is different from batteries. Notably, neither are a good solo solution to the volatility of renewables.
I know that in the Netherlands, stuf like this would require infrastructure upgrades. There is simply not enough copper running to consumer houses to handle the amperages.
This comes with the downside of leaking energy a lot faster than batteries. Moreover, the more energy stored, the faster the leakage.
All that is not to say this is useless. Just to say the role played by heaters is different from batteries. Notably, neither are a good solo solution to the volatility of renewables.
I know that in the Netherlands, stuf like this would require infrastructure upgrades. There is simply not enough copper running to consumer houses to handle the amperages.