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post #78 of Old 04-15-2019
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Re: Realistic expectations for my house batteries

Originally Posted by hpeer View Post
GC2 batteries are “Golf Cart” batteries.

I did a little more looking and found some Lithium as low as $1,100.

Batteries Plus sell lead acid GC2 batteries for $110 - $130.

So look at it this way, if I get 3 years from a set of batteries I get 30 years of battery per pocket book charge.

The lithium batteries would have to last 30 years to be equal.

That’s probably being a bit facetious and I’m sure there are other advantageous BUT...

No I don't think you are wrong in your skepticism on a Lithium conversion. Even if the 2000 charge cycles of Lithium batteries holds up. I won't live long enough to see if they actually do. It's been said most cruising boats spend 90% on their time at anchor. I certainly do. I head some place and hang out anywhere from a few days to a week. Since I do have a SAILBOAT usually my boats EP bank just needs a little top off. Solar and wind maintain it after that even if I do tap into it's energy from time to time.

Another thing you need to add to the costs of Lithium is the Battery Charger and the BMS (Battery Management System) needed to protect the cells from over/under charging. When I converted 11 years ago to EP I bought a second backup AGM battery charger (which I have never needed) so I've got a little more invested if I were to change now too. Personally the complexity needed to maintain a Lithium Battery bank scares me. AGM'S are easy to understand and figure out without additional circuitry needed to maintain them. What can I say I'm just a KISS (Keep It Simple Sailor)

Currently: Heading to warm waters over the winter on a variety of boats.

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Last edited by mbianka; 04-15-2019 at 09:10 AM.
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