Tesla’s PG&E Deal Lets Superchargers Open Before the Grid Is Ready

Image: Tesla

Tesla is using Pacific Gas and Electric Company’s Flex Connect program in California to open new Superchargers on spare grid capacity before multi-year utility upgrades are finished, letting sites run at full power when there’s room and throttle down when the local grid is tight. That’s according to Tesla’s charging account on X, which posted an article titled “Opening Superchargers Years Sooner” on Monday evening.

Tesla says that while it has sped up design, construction, and process to install more Superchargers in less time, “there’s one bottleneck faster construction can’t solve: grid capacity.” The company notes this is especially true for megawatt-scale charging like Semi, adding that “in Southern California for example, Megacharger projects can be waiting 3+ years in the utility queue for power.”

The idea behind a flexible connection is simple. “The grid is built for its busiest hours, so it usually has spare capacity,” Tesla wrote, explaining that drivers can start charging while the utility completes its upgrades, and that a site can be de-rated when the local grid is constrained. According to Tesla, “Drivers shouldn’t be impacted, especially early on after a new opening. Sites typically run well below their maximum.”

Tesla says Flex Connect has already accelerated some existing Supercharger projects, with dozens more underway, and points to a 48-stall site in Santa Nella, California that opened in 2024 using the program. “Drivers get Superchargers sooner, and the utility gets more out of the grid it already has,” the company said. “We expect a typical project to be able to open more than 2 years sooner.”

The bigger change starts this month. “As of this month, our V4 Supercharger cabinets can talk directly to PG&E’s systems using IEEE 2030.5, an open standard for utility communications,” Tesla wrote, meaning PG&E can now set a site’s power limit from day-ahead forecasts. Several pilot sites are scheduled to open this October, followed by a wider rollout in Northern California.

Tesla also laid out a set of principles for utilities, calling on them to share how much capacity is available and when upgrades are expected to finish, since “a flexible connection is a bridge, not a permanent solution.” It suggests utilities without advanced grid monitoring could start with simple fixed seasonal limits, and says IEEE 2030.5 “should be the protocol between utility systems and on-site charging equipment, and it’s the one we recommend utilities around the world to adopt.”

What’s still unclear is which Northern California sites are part of the October pilot, how often sites might actually be throttled, and whether drivers will notice slower charging speeds once newer locations get busier. Tesla also didn’t say whether Megacharger sites for Semi, like the Conley Megacharger in Georgia, will use the same approach outside California, or whether other utilities have signed on.

Would you mind slightly slower charging if it meant a new Supercharger opened years sooner?