ENSD launches 40 kW charging module for DC EV-charging stations

ENSD, a China-based manufacturer of power electronics and EV charging equipment, has launched Sirius 40Max, a 40 kW EV charging module designed for commercial DC fast-charging stations operating in demanding environments.

“Powered by our propietary EN5 core technology, the system is among the world’s highest-efficiency commercial charging modules, with peak efficiency above 99% and weighted efficiency up to 98.5%,” a spokesperson from the company told pv magazine. “This performance materially reduces power loss and optimizes station energy cost.”

The module also features a standby mode with 0 W standby power consumption and zero reactive power, eliminating no-load energy consumption when the charger is idle.

Instead of conventional air or liquid cooling, the Sirius 40Max uses a fanless natural-cooling design. By eliminating mechanical fans and liquid-cooling circuits, the sealed architecture is intended to reduce maintenance requirements and improve long-term reliability by preventing dust and moisture ingress. The fanless design also enables silent operation, making the module suitable for applications in residential areas and other noise-sensitive locations. Moreover, the module supports hot swapping, allowing replacement without damaging system components.

The Sirius 40Max measures 520 mm × 390 mm × 180 mm, excluding handles and terminal protrusions, and weighs less than 33 kg. It is rated IP65 for dust and water protection and is designed to operate in relative humidity levels from 5% to 95%, including environments with salt mist exposure, according to the manufacturer.

The operating temperature range extends from -40 C to 85 C. To protect internal components at elevated temperatures, the module automatically reduces output power when the ambient temperature exceeds 55 C.

The module accepts a three-phase AC input voltage of 300 V to 460 V AC at 45 Hz to 65 Hz, with a maximum input current of 78 A. According to ENSD, the input power factor is at least 0.99, while total harmonic current distortion (THDi) remains below 5% at loads between 50% and 100%.

On the DC output side, the Sirius 40Max delivers up to 40 kW across a constant-power voltage range of 300 V DC to 1,000 V DC, supporting a wide range of electric vehicle battery systems. The company specifies voltage regulation accuracy of around 0.5% across the full load range and current regulation accuracy of about 1% at loads from 20% to 100%.

For output voltages of 200 V and above, ENSD specifies an RMS ripple of no more than 0.5% and a peak ripple of no more than 1%.

According to the manufacturer, the combination of high conversion efficiency, sealed construction and precise power regulation makes the Sirius 40Max suitable for commercial DC fast-charging applications in a wide range of operating environments.