There just needs to be mechanisms to control and coordinate participation of household batteries in the grid. I'm sure Audrey Zibelman knows this and will be prodding the other parts of the bureaucracy accordingly. This will complement strategies such as demand management (which has been around for a long time in the form of off-peak and controlled load power but is being expanded to cover e.g. domestic air conditioning, and in extreme cases paying large industrial power users to reduce power use during periods of extreme power use or planned/unplanned outage of say a coal-fired plant).
