Why hypothetical? The famously least regulated grid of all is heading straight into battery based storage without a subsidy in sight. Nothing hypothetical about it.
> "Battery storage. In the next two years, power plant developers and operators expect to add 10 GW of battery storage capacity; more than 60% of this capacity will be paired with solar facilities. In 2021, 3.1 GW of battery storage capacity was added in the United States, a 200% increase. Declining costs for battery storage applications, along with favorable economics when deployed with renewable energy (predominantly wind and solar PV), have driven the expansion of battery storage."
> "Battery storage. In the next two years, power plant developers and operators expect to add 10 GW of battery storage capacity; more than 60% of this capacity will be paired with solar facilities. In 2021, 3.1 GW of battery storage capacity was added in the United States, a 200% increase. Declining costs for battery storage applications, along with favorable economics when deployed with renewable energy (predominantly wind and solar PV), have driven the expansion of battery storage."
https://www.eia.gov/todayinenergy/detail.php?id=51518