The batteries I am using come from the East Penn Co.,Once you do this, you may as well just have that little diesel running the prop and not pollute the earth with those batteries that need to be shipped to Asia to be recycled because of the laws in the USA not allowing this type of pollution to happen on our shores.
I agree that these electric systems like Hunter is selling are fine for lake sailing, but they will not work well for the areas that we traverse between the California Delta to the SF Bay. (50-60 miles against a flood tide & wind on the nose)
supposedly they are able to recycle 100% of the batteries returned
to their factory, in Pennsylvania USA.
I once sailed out through the 'Golden Gate' and on to Tahiti
without once using the motor for propulsion, except for exiting
and entering the ports. But you are correct that no all electric
system will power for 60-80 miles in the 'Bay', or even 6-8 miles
in my case.