It is being sold as “a next-generation control system platform” consisting of a propulsion unit powered by an electric motor, a remote-control box, and a joystick that allows boat equipped with HARMO to go forwards, backwards, or even sideways (!).
Everything in this propulsion system is wireless and of a piece. The battery — whether a “conventional” EV battery or something solar-y or even something more hydrogen-y and fuel cell-ish — is irrelevant.
It can be stored in the middle of the boat, in the bottom, on top, or wherever. HARMO doesn’t care.
This HARMO initiative is part of Yamaha’s long-term vision of “ART for Human Possibilities, Rethinking Solutions, Transforming Mobility,” and is “also seen as positive activity toward the United Nations Sustainable Development Goals.”
It also speaks to Yamaha’s plan to provide electric motors to other OEMs like Ford and Volvo which have historically bought high-performance engines from Yamaha in the past.
Reference- Yamaha Online Newsroom & PR, Futurism, InsideEVs