lfhoward wrote: 156 amp hours (the maximum capacity of my battery)
According to what test specs? That number will vary greatly depending on the specs of the CC discharge test: Start V, end V, and C-rate.
There is no "objective" measure. Cheap-chinese vendors will use say
3.65V to 2.50V, at a CC rate of 0.05C
and then marketing bumps the Ah result up a bit.
Top notch vendors actually deliver more than rated, sometimes by 10-15%!
...
> The level I call “a full battery” would be what I want to set as the normal point at which charging stops (13.8 volts in this case).
Voltage alone does not specify SoC%
That will also vary, based on
CC-only, stop immediately hitting 13.8V The resulting Ah capacity will then vary by the C rate.
or holding CV / Absorb until current trails down to an endAmps spec, 0.2C will differ a bit from 0.05C
I realize all these details may seem obscure, even irrelevant to many, I only offer them for those who want to understand...
> So basically, my battery was full at noon today when it went into absorption mode at 13.8 volts.
OK then yes, you got it, that is when you let the BM know you are at 100%
And if you trust that 156Ah and want longevity, leave at least say 26 in at the botton
so do not draw down more than 130Ah before recharging.
Also using say 3.10V as an LVC point, whichever you hit first.