There are many solutions for all types of boats.
Luxury sailboats: the CNB company had in its catalog an electric version of a luxury sailboat whose main advantages are; use of batteries as ballast to be positioned in strategic places. Electric motor (s) mounted on submerged and orientable pods allowing to crenate better than in a car and ensuring the cooling of the motor. removal of the shaft line and the many inconveniences it causes (vibrations, noise, space occupied, leaks, etc.). Possibility of using the motors to recharge the batteries. Improvement of navigation conditions in heavy weather, very rough seas (the motors are used to climb on the wave and when you "surf" on it you recharge the batteries ...
Tourist boats: various companies like
MWLINE manufacture electric AND solar boats which, at the quay are connected to the network and, once recharged, resell the surplus produced. these are extremely interesting for their users, because their annual energy balance is positive!
Yes, you read correctly, instead of costing fuel, they bring in sold electricity and in addition they carry passengers (paying preferably).
I recommend among other things the site
AFBE(French association for the electric boat).
There is a lot to read on the subject on the web, at your keyboards ...
