The Milestone That Makes Electric Fleets Real

Kempower, Windrose, and EV Realty complete North America's first real-world megawatt truck charging session in California

3 Jun 2026

In March 2026, a charging hub in San Bernardino, California became the site of a commercial milestone. Kempower, Windrose, and EV Realty completed the first real-world Megawatt Charging System session using Kempower hardware in North America, validating a technology fleet operators across the United States have long awaited.

The distinction matters. Rated above 1 MW, the system delivers significantly faster charging than conventional DC fast chargers. At EV Realty's San Bernardino Powered Properties hub, a 1,200 kW Kempower Power Unit feeds two Mega Satellite MCS dispensers through liquid-cooled cables, sustaining up to 1.2 MW and 1,500 amps of continuous output. Running on ISO 15118-20 ethernet communication, the setup is designed so trucks, charging hardware, and fleet software function reliably together regardless of vehicle manufacturer.

That interoperability has been the harder engineering problem to solve.

Windrose and Tesla are among the first US manufacturers to offer MCS-capable trucks, with Windrose already delivering to customers in California and Texas. EV Realty is building its network to serve any heavy-duty brand. Chief Commercial Officer Suncheth Bhat said MCS would reduce dwell times for fleet operators, and confirmed the San Bernardino site would be ready for commercial operations when trucks roll out later in 2026. Kempower VP Jed Routh said the milestone "demonstrates real-world interoperability, not just laboratory performance."

Set to open in April 2026, the San Bernardino hub is Kempower's first North American MCS deployment, following six months of European rollouts with logistics operators and truck manufacturers.

Wider network expansion will still depend on grid capacity and OEM production volumes. For US fleet managers evaluating electric truck adoption, though, the charging stack has now been proven in a live commercial environment rather than a controlled test. That shifts MCS from a promising specification into something worth putting in an operational plan.