Originally Posted by David_Old_Jersey
That's old style thinking
......"run out of fuel and fill 'er up"
(Petrol or Electric).
With Electric cars the easy and quick way is to swap all (or only some) of the batteries......obviously the car needs to be designed to acheive that easily (semi / full automation). and the garage likewise (basic infrastructure isn't really a problem, doesn't even have to be a traditional forecourt.......even if requires some Govt input (standardised design and short term cash - a lot cheaper than funding "Green" electric generation that will never
be more than a hobby
). No reason why could not do same at home and still have the plug and charge option. Bonus is that folk could buy the cars - but lease the batteries (no maintainence / replacement issues as the batteries are not "yours").
But with modern technology onboard no real excuse to run out of Electric power unexpectedly.....and all that's before on street / car park charging points.......or even valet charging (battery swap) for commuters.......
Appreciate translating all that to a boat will present challenges
But it's fairly early days yet with electric personal transportation........just need some new thinking into the mix as well as new technology.
There are companies building electric cars today according to this model. The battery is in the floor of the car and slides in and out at a battery charging facility. This is, in part, due to the sensitive way current
batteries charge. If you charge them half way, you end up reducing their lives, so why not have a central facility that has expertise in the charging. See the public company KNDI for example.
If such a vanadium battery that I described earlier comes to fruition, it could easily drive electric propulsion
to most sailboats. Most sailboats are moored and used on the weekends or a few times per week. And, I suspect that sailboats could be designed for electric propulsion
in a way that allows the batteries to be installed near or in the keel
to become part of the designed ballast.
Again, many boats are plugged in most of the time. The owner comes to the boat, motors out of the marina, sets the sails
, and shuts off the engine
The voyager, of course, is a different model but a minority of new sailboat purchases. I would imagine that a "pod" with an efficient charging propeller
could be lowered into the water
at the stern to afford charging. Solar
would supplement, of course. There are no real physical absolute limitations preventing this, but rather the state of storage
If the wind
can power a vessel to cross Oceans, certainly the wind can power the energy systems on board the vessel as well. (Converting the sail propulsion to electricity through the water
Or perhaps a multi-pitch prop could be used on the main propulsion motor. One pitch
for electric drive and another for charging the batteries. I don't know enough about whether the same motor is ideal for both propulsion and charging.