As we know from Calder's article, charging at anchor is seriously inefficient on most boats, and the amortized cost of running the main engine is about $4/hr. But... a 700ah Odyssey battery bank can accept charging at .3C and more, where C is the amp-hour capacity. Only lithium batteries can accept charge fast charging better.

So, the plan is to add an AltMount.com kit and a 210 amp Balmar, then control it with a dual regulator, derating the 210 to 160 and the Yanmar alternator to 60. The derating is necessary because alternators really don't handle running at full output for long. That will produce 220x14.4= 3168 watts that actually goes into the battery bank. Since the Odysseys accept high rates until they get up to 90-95% of full charge, engine run times will be way shorter than with typical batteries. They still need to be topped off occasionally to keep from losing capacity. That means a long day of motoring, shore power, or possibly a big enough solar bank. None of this comes cheap, but it is a boat after all.

Since none of this is installed yet, I'm only relying on Calder's data and conversations with him. He has hammered a bank of Odyssey's hard and they do perform for him. All of this technology has been around for a while thanks to the military.

My mileage may vary. I'll know soon enough.