Memorial Day 2026 gave Tesla's Lost Hills Oasis Supercharger its first major holiday stress test — and the station passed it in the most notable way possible: 112 vehicles charging simultaneously, drawing over 30 megawatts of power, with zero electricity pulled from the California grid. The station's combination of 11 MW of on-site solar and 39 MWh of Tesla Megapack storage handled the peak load entirely on its own.
What Happened on May 26
On the afternoon of Memorial Day — one of the highest travel days on Interstate 5 between Los Angeles and San Francisco — the Oasis station in Lost Hills, California, reached a peak utilization rate of 68.3%: 112 of its 164 V4 stalls occupied at the same moment. Each V4 dispenser supports up to 325 kW per vehicle, putting theoretical peak demand well above 36 MW.
Data shared by Basenor shows the actual peak power delivery exceeded 30 MW, sustained entirely from the site's renewable and storage infrastructure. The California grid received no draw during the peak window — a milestone for a charging station that opened with that specific goal in mind.
The Station's Infrastructure
| Specification | Detail |
|---|---|
| Total Stalls | 164 V4 Supercharger dispensers |
| Max per stall | 325 kW |
| Solar generation | 11 MW (ground-mounted + canopy) |
| Battery storage | 39 MWh (10 Tesla Megapacks) |
| Grid connection | Present but not used at Memorial Day peak |
| Location | Lost Hills, California (I-5 corridor) |
| Full opening | November 2025 |
From Groundbreaking to Record in Under a Year
Tesla broke ground on the Lost Hills Oasis in October 2024. By July 2025, 84 stalls were operational. The full 164-stall site with all amenities opened in November 2025, following stress testing that confirmed the station could deliver 7.5 MW of sustained load during peak simulations.
Memorial Day 2026 was the station's first true holiday throughput benchmark — the highest-traffic travel day since full capacity opened.
The roughly eight-month construction timeline from groundbreak to partial opening is fast for a project of this scale. The station includes pull-through stalls for vehicles towing trailers, EV-accessible restrooms, and covered charging areas — amenities designed around the practical reality of I-5 road trips where drivers stop for 20–30 minutes.
Why Off-Grid Matters at This Location
Lost Hills sits in California's Central Valley, where grid infrastructure is not designed for urban loads. Adding a station that draws 30 MW at peak from the local distribution grid would require significant utility upgrades — the kind that add years and tens of millions of dollars to a project. By pairing solar with Megapack storage, Tesla bypassed that constraint entirely: the station charges its battery reserves during daylight hours and dispatches stored energy during afternoon and evening peaks, when road traffic is heaviest and solar generation has already tapered.
The model also insulates the station from California's Time-of-Use electricity pricing, which can spike during peak grid demand periods — exactly when EV road trippers are most likely to stop.
The Bottom Line for EV Road Trippers
Memorial Day 2026 demonstrated that large-scale off-grid EV charging is operationally real, not just a press release concept. A 164-stall station on one of America's busiest highway corridors absorbed a peak holiday load at 68% utilization without touching the grid. Tesla's next planned mega-site — a 400-stall Supercharger in Yermo, California, also on I-15 — is expected to use the same solar-plus-storage architecture. If the Lost Hills data holds, the Yermo site would be capable of handling well over 250 simultaneous vehicles entirely on renewable energy.
Photo: Tesla energy / industrial / Pexels