A potential bottleneck will be the peak power consumption and peak charge rate. If you need to store energy year-round, charged and discharged at relatively a trickle, then this tech might be a solution.
I wonder how big and expensive a 5kW ion exchanger would be. That would be able to power my household in the winter. Charging at 5kW during the ~5 hours of sun during the ~5 summer months. Discharging at .5kW average in winter, 5kW peak?
If a 5kW unit would be prohibitively expensive or large for my example scenario, then different materials and configuration for the ion exchange unit would be needed.
Note: I am not worried about the size of the pumps and tanks. These could be stored underground, in the case of a suburban house. For apartments, this would be harder to retrofit. Above paragraphs in this comment are all about the ion exchange unit, which would determine the maximum charge/discharge rate.
If a 5kW unit would be prohibitively expensive or large for my example scenario, then different materials and configuration for the ion exchange unit would be needed.
Note: I am not worried about the size of the pumps and tanks. These could be stored underground, in the case of a suburban house. For apartments, this would be harder to retrofit. Above paragraphs in this comment are all about the ion exchange unit, which would determine the maximum charge/discharge rate.