Your post inspired me to do a bit of research
into the Nanni hybrid drive, certainly a very tidy and compact approach to the electric propulsion
Meta has been building metal boats for a long time including Moitessier’s “Joshua” back in the mid 1960s so no surprises there re the ability to supply a competently built metal hull
I’m a bit conflicted with the Eco concept
though, metal boats are big contributors to the Co2 emission problem and aluminum
is the worst of all the boat building materials in this respect( around 12tons of Co2 per 1 ton of rolled plate, minesite to warehouse ).
I’m a slow adopter with modern electronics
and the concept
of a common rail ECU controlled engine
coupled to an electronically controlled charging
and drive system that is saltwater cooled seems to imply a high degree of systemic fragility. ........no solar
power mentioned as an additional source of replenishment but there is the wingsail kite.
I have no doubt that renewable clean electric
power is the future but currently, long distance cruising with electronic fallibility and no viable sail alternative would concern me.