I posted math in another comment, maybe wildly off. It's 1500 kWh of battery from 30 old blade1s / upcycled byd packs, + 600kWh of grid power (typical industrial i.e. no need for major grid changes) + 30 kWh of solar roof (i.e. minor contribution). Scaled for 3300kWh for 2-3 hour morning/afternoon rush, about 100kwH per car. 100-150 cars per day like typical gas pump. The key point is the battery storage with upcycled old batteries (i.e. 0 capex) is CHEAP and space efficient, and since storage basically free, they can simply stack more packs in future to grow buffer if required. Of course assuming long term proven safety, i.e. no laws mandating burial. Otherwise storage is couple parking spots big x 2m high. Can stack to 4-6m... but I think regulatory will probably prevent it from any higher. TLDR basically system scaled/designed to use typical grid power + size battery buffer + charging speed for gas station parity.