Gensets make most sense for those who anchor
out (or use a mooring) rather than a dock
. Running the main propulsion engine
just to charge batteries or support an inverter
load at under 2000 rpm
is not fuel efficient or particularly good for the engine.
Even then, it's hard to believe that those costs exceed the cost of buying
genset and maintenance
of a genset. That's why most people run the main engine.
There's a really interesting new option that might be better than adding more batteries or going to a traditional DC generator
- the Whispergen - based on a Stirling "external combustion" engine (try to figure that out!) it is very fuel efficient, much quieter than a genset, completely automatic (it turns itself on and off as required for the batteries) - it provides 70 amps battery charging
, hot water
, and cabin
heat (as needed). I saw it at the Annapolis
show and was blown away. It has all of the risks of new technology but but it's being distributed in the US by Mack Boring - the primary East Coast Yanmar
distributor. It's impressive that they liked it enough to pick it up.
There was also a piece in Professional Boatbuilder
last month that was very interesting - it's online.
I'm in no way related to this company and don't even own one - but I'm hoping they turn out to be as good as they look