WattEV announced the introduction of its Solid-State Transformer (SST), a compact medium voltage power conversion system (MV-PCS) designed to accelerate deployment of MCS fast chargers.
Funded in part by the California Energy Commission (CEC), the MV-PCS was developed as a replacement for step-down transformers, switchgear, and low-voltage rectifiers. The innovative new system is designed for convenient installation on service islands between pass-through lanes, offering megawatt charging to MCS-capable trucks, and is expected to become available in volume production in 2026.
Unlike conventional 480-volt systems, the integrated design significantly reduces installation costs by simply having the utility medium-voltage line at 12 kV to 15 kV split via junction boxes and connected directly into the liquid-cooled SST cabinet.
“As fleets work toward MCS deployment, complex equipment stacks and supply chain issues, along with tariffs, become real constraints,” said Salim Youssefzadeh, CEO and co-founder of WattEV.
“The SST is designed to bring MCS to heavy-duty depots faster and more cost-effectively. While our focus is electric truck charging, the core of our high-voltage architecture also fits other DC power applications, including data centers, mining, marine, and industrial uses,” he said.
Key Benefits of Solid State Transformer
- Faster site development: Replaces multiple pieces of equipment with a single integrated system, reducing civil engineering and electrical work.
- Lower installation and maintenance costs: Simplified design means fewer components to procure, install, and service.
- True megawatt capacity: Direct conversion from 12KV-15KV to DC with variable voltage and current at 1.2 MW to 3.8 MW.
- Modular scalability: Operators can add capacity as demand grows, avoiding costly up-front overbuilds.
WattEV has completed its proprietary SST design and expects production-ready units to be available in 2026. As fleet and public charging networks expand nationwide, WattEV’s SST offers a practical, cost-effective solution for deploying megawatt infrastructure, helping depots and hubs come online faster and scale predictably.
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