There are three different power system designs: the first uses long wires, the second uses a battery, and the third uses short wires. Apart from this difference, all configurations can be equipped with the same equipment.

A superior power delivery network (PDN) is built using a combination of high efficiency, high density power modules from Vicor. The first example uses a Vicor DCM DC-DC converter to convert 400V over long wires to 48V. The second example uses a PRM buck-boost DC-DC converter to regulate the voltage from redundant 48V batteries to 48V. Both examples use a high efficiency, fixed ratio, low voltage BCM to convert 48V to the voltage required to power the onboard equipment.

In the third example, a short-wire configuration, a high-voltage BCM is placed upstream of the power supply system to supply 72 V. The BCM is a DC-DC converter that uses Vicor's proprietary SAC (Sine Amplitude Converter) technology and supports input voltages from 36 V to 800 V. It has a fixed voltage conversion ratio (K factor) and is available in a variety of settings, making it suitable for a wide range of applications.

The High Voltage BCM has a power density of 2,400W/in³ and a peak efficiency of 98%. Multiple BCMs can be connected in parallel for higher power output, or the outputs can be connected in series for higher voltage output.

The eWROV is the world's most capable fully electric work class ROV. eWROV solves heat dissipation challenges, significantly expands payload space, and reduces the size and weight of electronics. Using high voltage DC power, it achieves performance equivalent to a 250 horsepower hydraulic subsea vehicle while significantly reducing cable size and weight. Unlike traditional hydraulic ROVs, eWROV is a fully electric system, eliminating the need for large amounts of hydraulic fluid and improving efficiency, reducing environmental impact and risk.

After early experiments with small, tethered, airship-like drones failed due to the difficulty of keeping them stationary in high winds, and then again for more demanding remote communications, intelligence, and reconnaissance (ISR) applications, we developed a new category of tethered drone that can hover in place, ascend and descend vertically, have enormous power, and can hover for weeks in harsh environments.
Military/industrial grade Unmanned Multi-Rotor Aerial Repeater (UMAR) tethered drones can operate at altitudes up to 500 feet and have an operating time of over 400 hours thanks to the thin, lightweight wires that allow for continuous power. This requires very thin, lightweight wires, and the host vessel must power the multi-rotor drones at very high voltages (500-800V) to reduce current levels dramatically. This allows the drones to be more maneuverable and to carry more payload. The high-voltage converter must also be as small and lightweight as possible. UMAR has eight rotors that are intricately interconnected with PCB circuits, and reducing the size of the power conversion components allows for additional value-added components to be installed.

DMI is the first in the world to commercialize a revolutionary hydrogen fuel cell power pack with four to five times the energy density of batteries, extending drone flight time to a maximum of two hours. With drones equipped with hydrogen fuel cell power packs that have an extended range, DMI is providing humanitarian aid worldwide. They have transported masks and emergency supplies from the U.S. mainland to the Virgin Islands, and medical AEDs from mainland Korea to Jeju Island, delivering them to the top of Hallasan, the highest mountain in Korea.
The power pack has two main power delivery networks (PDNs) that power the drone's rotors and the intelligent controller that controls the two fuel cell stacks. Since the output voltage can vary over a wide range from 40 to 74V, the power train is designed to precisely regulate the voltage and ensure that it can deliver 48V, 12A to the rotor motors and 12V, 8A to the fuel cell stack control board and fans.