can initial charging of smart litium be done with standard agm charger.
asked
Initial charging of smart litium with agm charger
Hi @Mhuusko
Please follow the manual on this. you could use any charger that puts out the correct voltage...as long as it is controlled by the BMS!!
'a AGM charger' doesn't say anything.
ps. if it's a 12V system than you don't have to do an initial charge, only when you put multiple batteries in series.
I’m about to in parallel connect an additional 200 Ah battery to my RV.
The new battery cell are at 3.26V.
Only hava a Ctek MSX 25 external charger, could it be used?
again: for a parallel connected battery you don't need an initial charge, just make sure they are both at about the same voltage before connecting.
in your system, make sure the BMS controls the charging / discharging as in the manuals.
What approximately is “about at the same voltage”? A couple volt difference acceptable or ??
Far too much. If you can't charge both to the same voltage, balance them by joining the negatives, then connect a light bulb or power resistor across the positives until the voltages are equal/current stops flowing through the bulb. It will take a while.
Thank you for the response. For clarification, this is not an initial charge of two batteries. I needed to temporarily remove one of two Victron 200Ah batteries in my parallel installation. My system has remained in operation with one battery and thus is fully charged while the other battery is not fully charged. 13.5V vs 13.3V. I am now ready to reinstall the second battery back into the system. Is this nominal difference in voltage going to be an issue? Alternatively, I could drain the installed battery to match the uninstalled battery at 13.3V. I may be splitting hairs here but there is not specific guidance on this subject.
