I just installed my Victron 712 BMV and two Lion Energy 1300 Lithium batteries. Can someone with these Lion batteries please screen shot all of your settings on your BMV?
asked
Victron BMV Settings
This is what Lion Energy emailed me on settings for the UT 1300 batteries I just installed!
ttery capacity: (number of batteries X Amp hours)
Set this to the sum of the amp hours of that batteries that you have in your system. In this example the system has 4 Lion Safari UT 1200 batteries which are rated at 90Ah each (4x90Ah=360Ah). If you have the Lion Safari UT 1300 batteries you would use 105Ah per battery (or 420Ah for this example).
Charged voltage: 13.9
This is where things differ a bit from other Lithium Ion battery manufacturer’s batteries. Due to the nature of the (very good) battery management system (BMS) in the Lion Safari UT batteries, the state of charge (SOC) measured by the Victron BMV battery monitor can get out of sync with the actual SOC of the battery causing the displayed battery percentage to drop slowly over time. To avoid this the Charged voltage is set to 13.9 volts. (This change will also be made later in the MPPT charge controller as well).
Tail current: 4.00%
No change needed here. The default is sufficient.
Charge detection time: 3m
No change needed here. The default is sufficient
Peukert exponent: 1.05
This setting is related to the efficiency of the battery when charging particularly in relation to battery temperature. Compared to lead acid based batteries, LiFePo4 batteries are extremely efficient to charge across their entire operating temperature range so this number should be very close to 1.00 (without being set to 1.00 as this would disable the Puekert compensation).
Charge efficiency factor: 99%
As lithium Ion based batteries accept a charge very easily this should be as close to 100% as possible (without being 100% because as efficient as they are there is still a very small amount of Ah loss with LiFePo4 batteries).
Current threshold: 0.10A
No change needed here. The default is sufficient.
Time-to-go average period: 3m
No change needed here. The default is sufficient.
Note: The changes will be saved when a green checkmark
Battery Capacity : the calculation of your total Ah capacity of a system is not necessarily a question of simply multiplying the given Ah rating of each battery by the number of batteries you have. That only works if all batteries are connected in parallel.
For example if you have 8x 12V 220Ah batteries connected in 2 banks (each bank consists of 4 batts in series, each bank connected in parallel) to make a 48V system then the total Ah is 440Ah.
