David,
This topic gets discussed often. Do a search in this Yahoo group using "agm wet battery capacity" and you'll get some very detailed answers. There are other posts but there are so many posts that cover parts of your question, it's hard to narrow down the list.
The very short version is the following:
All lead acid, flooded, AGM, Gel, etc. weigh close to the same per kWh of storage, Lithium (LiFePO4) is about 40% the weight of lead acic.
Flooded cells are cheapest, AGM up to twice the cost, and LiFePO4 about twice that.
AGMs and LiFePO4 have very low self discharage rates.
AGMs have a longer lifespan than flooded, LiFePO4 longer still.
They are all safe. Most people don't consider Gels worth the price for our purposes.
Try to dig deeper into previous posts here and the best of luck in your conversion.
Fair winds,
Eric
Marina del Rey, CA
--- In electricboats@yahoogroups.com, "davidhughes_casaba" <davidhughes_casaba@...> wrote:
>
> I will be installing a 24 volt direct drive system and I am researching my battery options. So many combinations to choose from and wanted to get some feed back from this group and it not just on cost, but safety, longevity, weight, charging consideration, self discharge rates, ect. I was looking for about 200 amp hours and my first thought was 2 4D AGMs but man those 4Ds are big and heavy, the battery boxes for those are also very expensive. The 4D AGMs are also a chunk of change.
>
> Any feedback on Wet Lead Acid, versus AGMs, Gels, or other metal hybrids would be interesting as well as thoughts on 2 12v 4Ds, 4 6 volt, 4 12 volt group 31's (to get the individual weight down).
>
> Thanks
>
> Dave
>
No comments:
Post a Comment