I'd rather give excess power to my neighbors for free or just waste it on a giant spinning pinwheel than "sell" it back to the power company. No mention of local battery storage by the reporter or the "reported/reportee".
I pay US$7.94 a month to my utility to "store" megawatt-hours of electricity over the course of a year. Brand-name home battery storage is still well over $500 per kilowatt-hour installed.
So yeah, I'll engage in shameless commerce with the evil corporate utility if they'll loan me a $2.5-million-dollar "battery" for less than 8 bucks a month.