We are pretty heavy power users on the Mar Azul and wore out our golf cart battery based house bank about 1/2 the way around on our Caribbean loop. I had always been interested in lithium batteries, so we did some research and decided to be an early adopter of the technology.
This page has a link to the PDF that describes the decision making process, the research and the installation. It’s intended to provide a place to start for someone considering LiFePO4. It’s not completely cookbook technology yet, but not beyond the capability of someone who can safely install an inverter/charger.
There are quite a few external links to Internet sites with additional information.
The installation was completed in Grenada a few months ago and so far we are satisfied. We won’t know until summer if it outlasts our golf cart batteries, and even longer to make a determination on if it was a good investment, since cycle life was the key criteria for our choice.
We have observed more flexibility with generator recharging since the usable capacity is greater and shorter generator run times since we never have to charge to 100% and wait out the tapering current of a full charge on Lead Acid. It’s not a huge difference, maybe 2-3 less generator hours a week. The DC watermaker is much happier with the 13V supply and produces 15% more water per hour.