While direct government subsidy is one way to increase battery adoption to increase power generation efficiency, a market based approach is for electric power companies to use batteries installed on customer premises as a power bank for the entire grid.
If you ever check out gridstatus.io [0] or similar resources, you may have noticed "storage" or "battery" as a part of the fuel mix. These are most often power company owned centralized facilities.
Another approach is for power companies to leverage batteries installed on customer premises. "A critical mass of home batteries scattered across a region and networked together through so-called virtual power plants, or VPPs, he says, marks 'the shift from energy storage as backup to energy storage as an active grid asset.' [1]"