WattEV Orders 370 Tesla Semis — Largest California EV Fleet to Date

WattEV ordered 370 Tesla Semi Class 8 electric tractors, the largest single electric truck deployment in California once deliveries complete by end of 2027. The first 50 units ship in 2026. More than 300 of the Semis will operate under a joint program with the Port of Oakland.

How did WattEV select the Tesla Semi over competing electric Class 8 tractors?

WattEV issued a public request for proposals and selected the Tesla Semi based on cost, performance, and availability, according to CEO Salim Youssefzadeh speaking at ACT Expo in Las Vegas. The order comes as the Tesla Semi enters mass production at its Nevada factory.

What charging infrastructure will support the 370-unit fleet?

WattEV plans to open truck-charging stations at the Port of Oakland and in Fresno equipped with Tesla's Megawatt Charging System (MCS) chargers. The MCS units can add 300 miles of range to a Semi in approximately 30 minutes. Additional charging depots are planned for Stockton later this year and Sacramento, with the Sacramento site breaking ground in 2026.

What does the 30-minute charge time mean for drayage operations?

A 300-mile range addition in 30 minutes puts the Tesla Semi's charge rate at 600 miles per hour of charging. For port drayage — typically 100 to 200 miles per day — a driver on a 30-minute break can recover a full day's range. That charge speed eliminates the need for mid-shift charging in most short-haul cycles, provided the depot has enough chargers to avoid queue time.

The MCS standard is not yet finalized by CharIN, the industry consortium managing the spec. Tesla's proprietary MCS implementation may or may not be compatible with future third-party MCS chargers from ABB, Siemens, or other suppliers. Fleets planning to mix Tesla Semis with other EV tractors should confirm cross-compatibility before committing to charging infrastructure.

How does this order compare to other Tesla Semi deployments?

PepsiCo operates approximately 100 Tesla Semis across facilities in California and Texas, the largest known deployment prior to the WattEV order. The 370-unit WattEV order is more than three times that scale. Tesla has not disclosed total Semi production volume or the size of its order backlog.

What is WattEV's business model for the fleet?

WattEV operates a vertically integrated model combining vehicle deployment and charging infrastructure. The company did not disclose whether it will own the 370 Semis outright or deploy them under a lease or truck-as-a-service arrangement with drayage carriers serving the Port of Oakland.

Port drayage is a natural fit for battery-electric trucks — predictable daily mileage, return-to-base operations, and minimal need for over-the-road range. California's Advanced Clean Fleets rule requires drayage fleets serving ports and intermodal railyards to transition to zero-emission vehicles on an accelerated timeline, creating regulatory pressure that makes the WattEV order less speculative than it would be in long-haul.

What remains unknown about the Tesla Semi's operational cost?

Tesla has not published verified total cost of ownership data, maintenance intervals, battery warranty terms, or battery degradation curves from customer fleets. PepsiCo reported positive early results but has not released per-mile operating cost comparisons to diesel equivalents. The Semi's battery capacity is estimated at 900 kWh based on third-party teardowns, but Tesla has not confirmed the figure or disclosed replacement cost.

Without published service schedules, fleets cannot yet model parts inventory, technician training requirements, or downtime for repairs. The Semi uses a tri-motor drivetrain with no transmission — fewer moving parts than a diesel, but motor and inverter replacement costs are unknown. Battery pack replacement cost, if needed outside warranty, could exceed $100,000 based on per-kWh estimates from other EV platforms, though Tesla has not disclosed Semi-specific pricing.

What does this mean for small fleets considering electric trucks?

The WattEV order signals that large-scale EV deployment is moving from pilot programs to operational fleets, but the economics remain opaque for owner-operators and small fleets without access to WattEV's capital base or charging infrastructure. A single Tesla Semi likely costs $150,000 to $180,000 based on Elon Musk's 2017 pricing guidance, though Tesla has not published current pricing. An owner-operator cannot install a Megawatt Charging System at home — the unit requires commercial three-phase power and costs an estimated $100,000 to $150,000 installed.

Small fleets should wait for published TCO data from WattEV, PepsiCo, or other early adopters before committing capital. The regulatory tailwind in California — zero-emission mandates, HVIP vouchers, and potential future diesel restrictions — does not exist in most other states. A truck that pencils in Oakland drayage may not pencil in over-the-road freight or in states without charging infrastructure or purchase incentives.