Charging batteries without generator or shore power.

[B33RND]

Originally Posted by tkk

Are you running all that stuff also when you are not running the boat? If not, it should be taken into account in your calculations.

Well, usually I have them off when not sailing, maybe some short times on with stopped engine.

Berend

[FAST FRED]

The problem as I see it is charging if the engine is not pushing the boat.

The few hp it takes , even with a 300A/24V bus alternator will severely underload the 200hp main engine.

If its a car or truck transplant , no turbo , and square cut rings will work better .A true HD industrial conversion will have a harder life than the truck transplant.

The fuel bill will be outrageous as 200 hp really does not like to make under 10hp for very long.

I would rethink the setup if any time anchored is contemplated , a small diesel loaded properly can be quiet and perhaps 5x as efficient.

If you have a fire proof area for one dry stack, the second wont be much bother.

A keel cooler can be used for more than one engine.

FF

[WotEver]

Originally Posted by FAST FRED

A keel cooler can be used for more than one engine.
FF

FF - am I reading you right that you're suggesting a 2nd engine (generator) for completing the charge when not underway? If so, then I agree wholeheartedly as 4/5 hours charging will never get the batteries anywhere near a full charge with the depth of discharge OP is proposing.

Regards,
Tony