Incorrect... a charging source of 14.2V and like an alternator will get LI's to 100% SOC, and as efficiently as a source of 14.6V due to their very low internal resistance as compared to lead acid batteries.
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That's what I thought based on all the research I've done...seems like even 13.8v would do the job, just not quite as fast, but easier on the batteries ?
What I'm trying to understand the relationship between the bulk charge voltage, and the absorption charge voltage specifically for my LifePO4s. As Peter suggested, our batteries have a resting charged voltage of 13.4v. So for my solar charger I'm trying to make sure I've got proper settings.
My blue sky 3000i charger has a few settings I'm trying to make sure I've got set properly to maximize charging and life of the battery. I've put in what I *think* is right, but not sure...
AbS - absorption charge voltage - 13.4v
Abt - absorption charge time - .5 hrs (should be set already)
uPr - max setpoint limit - 14.2v
FLt - off (should already be set)
my understanding is that no matter what, no setting will be able to exceed the uPr parameter of 14.2v. And that Bulk charging would shoot up to the uPr limit, deliver as much current as possible to the batteries. As the battery voltage rises to AbS (13.4v as the fully charged voltage), the current is backed off, and voltage maintained for 30 mins. Then since I have float charging turned off, charging just stops until battery voltage drops below the AbS voltage of 13.4v, and re-enters bulk charging, shooting up to 14.2v if possible to bring back to AbS voltage, and repeat.
Is this correct ? should my AbS voltage setting be higher? or am I right in setting the absorption voltage to be the 100% charged voltage of 13.4v ?