HV-MELA-BAT Showcases Megawatt Charging System

Why It Matters

The breakthrough efficiency and compactness accelerate deployment of ultra‑fast chargers for heavy‑duty and passenger EVs, easing grid strain and lowering infrastructure costs.

Key Takeaways

• 99.26% efficiency sets new industry benchmark
• 1 MW output achieved via four 250 kW modules
• 9 kW per liter power density reduces converter size
• Buffer storage cuts grid demand to 500 kW
• Series‑resonant topology enables 200 kHz switching

Pulse Analysis

Fast‑charging infrastructure is a critical bottleneck for the rollout of electric trucks and high‑range passenger vehicles. The HV‑MELA‑BAT project addresses this gap by marrying the Combined Charging System (CCS) framework with the emerging Megawatt Charging System (MCS). By delivering a 1 MW charging capability in a modular fashion, the consortium demonstrates that megawatt‑level power can be achieved without the massive footprints traditionally associated with such systems, positioning Europe’s EV ecosystem for rapid scaling.

At the heart of the system lies a compact, galvanically isolated DC/DC converter that pushes efficiency to an unprecedented 99.26% while packing 9 kW per liter of volume. Leveraging a series‑resonant converter topology and a 200 kHz switching frequency, the design slashes the size of inductive components, translating into lower material usage and cost. The modular approach—four 250 kW units operating in parallel—offers flexibility for manufacturers to tailor power output to specific site constraints, a valuable advantage for both depot‑level and highway‑side installations.

Grid integration remains a paramount concern as charging stations proliferate. By incorporating a buffer storage unit built from second‑life Mercedes‑Benz passenger‑car batteries, the system can operate with a peak grid draw of just 500 kW, effectively decoupling charging demand from local grid capacity. This not only mitigates peak‑load stress but also provides ancillary services such as load leveling. The combination of record efficiency, reduced footprint, and intelligent energy storage positions the HV‑MELA‑BAT solution as a compelling blueprint for future high‑power EV charging networks.