Fleetzero & Glosten to Develop World’s Longest-Range Hybrid Electric Vessel

[By: Glosten]

Fleetzero, a leading developer and manufacturer of modular propulsion platforms for hybrid and electric ships, has selected Glosten, a leading naval architecture and marine engineering firm, to design what is expected to be the world’s longest- range hybrid electric vessel. This collaboration marks a major step forward in the effort to offer zero-emission global shipping and expand the reach of electric propulsion in commercial maritime applications.

Glosten has been working with Fleetzero on the retrofit of a Lightering Support Vessel owned and operated by AET. This vessel is being outfitted with a plug-in hybrid-electric propulsion system and will transit primarily on battery power once the conversion is complete.

“This vessel will be a major milestone—not just for us, but for the entire industry,” said Steven Henderson, CEO of Fleetzero. “Partnering with Glosten allows us to showcase how our propulsion technology can enable economical, cleaner, and more efficient operations, while pushing the boundaries of what’s possible in shipping.”

“We’re excited to support Fleetzero in transforming this vessel,” added Morgan Fanberg, CEO & President of Glosten. “It’s a bold move toward the next generation of marine technology, and exactly the kind of advancement we’re proud to support.”

With the vessel design already underway, Fleetzero and Glosten will transition into detailed engineering in the coming months, with construction expected to begin in mid-2026. Once operational, the vessel will serve as a model for long-range hybrid-electric propulsion worldwide.