"cavelamb" wrote
The littlest Honda EU series generators make 1kw, 2kw or 3kw depending
on model. $699,999,1788
And two can be buddied up with a parallel kit for 30 amps.

There is also a 2500 watt Honda "tube frame" set listed for $629.

But all this is 110VAC!

Those generators have built in chargers. The 2kw unit has an 8 amp DC
battery charging output. SEE:
http://www.mayberrys.com/honda/gener...ls/eu2000i.htm

With a high quality charger, you might get a bit more by using the A/C - But
these chargers are much more expensive.

So, lets say you use two generators putting out 16 A - These can replenish
16 AH for each hour they are run. You could start with 400Ah of battery
capacity fully charged and plan on running this down to 200AH - If you do
this over, say, 8 hours while running the generators, you would get
25+16=41A to operate the electric outboard. Not bad if you can then get back
to shore power. Alternatively, if you can carry enough fuel, you recharge
overnight using the generators which now need to run 24 hrs/day!

BTW -110V A/C could be dangerous on a boat!