Battery Monitor

TAGalong

I'm a new T@G owner though we've been in the nuCamp family for over ten years.  After returning home from our initial camping outing (where we had 30amp hookup), my Victron Battery Monitor state of charge seems stuck on 83%, even though I have been plugged into 110 current overnight.  The voltage reading seems to be working.  It doesn't seem to matter whether I have the battery switch on or off.........still reads 83%.  Anyone know why this is?  Prior to the trip, it would read 100% under similar circumstances.  I have a TAG XL Boondock with 100amp lithium battery.

JamesDow

I have a 2018 T@G with a Renogy lithium battery. If plugged into 120v my battery will reach around 83%. If plugged in running my refrigerator the charge can get up to around 96%.
Reason for this is the T@G converter. It was not made for charging lithium. The reason for why I can get 96% is the charging parameters of the converter. A load makes it cycle through them.
To get to 100% I use either a lithium battery charger or solar. Note: Lithium (LiFePO4)  needs to get to 100% to balance the cells.
Not worth the effort or cost to replace the converter. 
If you have a newer T@G converter, then double check if it is rated to charge lithium batteries. 

The_Rigger

JamesDow said:

Reason for this is the T@G converter. It was not made for charging lithium....

If you have a newer T@G converter, then double check if it is rated to charge lithium batteries. 

Amen. My '21 T@G came with an older, non-lithium WFCO power center, which couldn't adequately charge the LiFePO4 battery that I changed over to. I replaced it with a WFCO model WF-8725-PB-LiS, which is the lithium-capable controller that does NOT have the auto-detect circuitry (which has proven problematic), it instead has a good old-fashioned mechanical switch to set the charging profile from lead-acid to LiFePO4.