I've been following a few RV channels on YouTube and learning about lithium
batteries? Some people are living "off-the-grid, living large with solar
panels and inverters. Just learned that lithium batteries are 40 pounds less
weight per battery and last three to five times as many years, (3000 to 5000
cycles vs 1000 cycles for AGMs). AGMs and Lead Acid shouldn't be drained below
50% so you really need four 100ah AGM batteries to have 200ah available.
Lithium can be drained down to nothing without harm, so two give you 200ah. If
I was keeping my boat, or doing any long cruises, I'd definitely look into
those. I got eleven years from my first AGM batteries so Lithium should last
me thirty years. One Lithium battery presently costs $950 for Battleborn vs
$300 for a quality AGM and two lithium batteries ($1900 and 58# total weight)
equal the amp hours of four AGMs ($1200 and 276# total weight). Lithium is
actually $500 cheaper if you keep the boat long enough to have to replace the
AGMs twice (cost $2400) and they are 218# lighter. That's a hell of a weight
savings for racers.
Prices keep falling for this new technology, so it's simply a matter of time.
I think one Lithium might replace my two AGMs at some point in the near future.
Chuck Scheaffer, Resolute 1989 C&C 34R
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