Thanks for taking the time for your very detailed response!
I never thought about using that type of meter on the cart, but do have something similar (Victron BMV712) in my motorhome. I don't think I'm THAT concerned about the battery status, really just wanted a swag so I don't inadvertently get stranded somewhere, but I'm rarely more than 1 mile from home. I'll consider your recommendation.
My charger is the Plowmans in-house LiFePO4 charger. I just went and plugged it in and we'll see what it does.
4C7C2586-9DE5-4872-9FF1-2085F9AFAD9A_1_201_a.jpg
Thanks, Rich
Quote:
Originally Posted by Pat911
Hi,
A normal 48v LiFePO4 is made up with 16 cells, which gives a max charging voltage of 58.4v (3.65v/cell) but from the information you provided above, it seems that these Allied batteries are only using 15 cells, giving a maximum charge voltage of 54.8v.
Your resting voltage of 52.4 indicates a filly charged 15 cell battery or a 50% charged 16 cell battery. Lithium batteries are best stored and shipped at 50% capacity so there’s a discrepancy there.
If it’s a 15 cell battery You’ll need a lithium charger (CC/CV power supply) with a CV setting of 54.8v. If it’s a 16 cell battery you’ll need a 58.4v CV setting.
Allied should be able to tell you if you need a 15 cell charger or a 16 cell charger.
The discharge curve for lithium is very flat so you cannot accurately predict state of charge with voltage, you’ll need a coloumb counting SOC meter, hence the no published voltage chart. This is the one I use and recommend.
https://www.renogy.com/500a-battery-...xoC0UYQAvD_BwE
Cheers
Pat.
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