Hi
I have a Victron smartsolar mppt 100|20 connected to a brand new 100ah lifepo4 battery (12.8v nominal, make is cfe 1280S). I have set the preset to lithium lifepo4 and have a 200w solar panel connected to it. I started at 13.3v and I ran it down to 13.1v (it said 88% on its voltage panel) and then charged it back up.
The charge controller completed charging, having completed bulk, then absorption at default 14.2v and went onto float at 13.5v which is default too.
I then shortly disconnected the battery from the solar charger and the weird thing is the voltage instantly dropped from 13.5v to 12.8v. No loads connected during charging or afterwards. Now the battery says it is at 72%. The controller said it put in 260w in total, so how is it possible it is lower now than when I started? Is the battery faulty? Do I need to change a setting?
Would greatly appreciate any help.
Thanks!