- Nov 18, 2010
We were getting ready to leave St. Thomas to cruise again. Based on capacity tests the LA batteries we had (4 GC) would likely die during this cruising time. And the cost of good quality golf carts in the USVI is around $850. So the cost to go to a similar sized usable bank wasn't too much more. The weight savings it enormous. My whole bank weighs as much as one golf cart. The life cycles should give us many years. And since we had already upgraded our solar and alternator to fully programmable options we didn't have as much of an initial cost jump. Another big factor is the voltage sag. With the lithium I can be at 60% state of charge and run large loads (DC watermaker pulls about 25 amps and the electric kettle pulls 100 amps) and not get into a low voltage situation while they are running.what pushed you to go lithium ion?
Eventually I will probably move the bank to a different location and make the space for the batteries tool storage. But that's down the line.
We are 3 months into cruising and love them so far. Sitting on anchor in Martinique. Got up and made coffee (no propane used, just the electric kettle) and started the watermaker. It's only 10 am and my tank is almost full plus I am still putting a couple amps into my bank. By 4 pm I will be back to 100% SOC (which is actually only 90% SOC). It's a great upgrade but not for your average boater. I took over 2 years reading everything I could and still needed advice from people with more knowledge. I also would have these as a weekend boater or liveaboard in a marina. To me they are for cruisers who will put in the work and are on the boat full-time.