powered by solar
is not really feasible for a largish cruising boat. 700 liters of diesel fuel
-- what I keep on board my boat --contains 7.8 megawatt
/hours of heat energy, which can be converted to more than 2 megawatt/hours of propulsion
energy. What kind of solar
would be required to come even within an order of magnitude of that?
Electric outboard is actually an intriguing idea, and I do know some people who are using Torqueedos. But if you need to be able to plane a RIB
and have a few hours of range, also not really realistic.
And in general, "enough" solar panels
for all that -- where would you put them? It's hard to find space for ANY solar panels
on a low windage boat, intended to be capable of making long distances upwind.
Solar is wonderful if you have room for it and/or don't care about windage, but the power density of diesel fuel
can't be beat except by nuclear (which is not yet available to us
). A small, very light, diesel fuel burning (not necessarily diesel cycle) outboard would be terrific. There's another thread on here somewhere, about that.