The below is specific info directly related to my LiFePO4
bank, I have copy pasted from this site on "Solar Power and Battery Monitor
Shunt Questions ''
I think it is important to understand, if not fully then enough to begin to study it and apply ...Thanks to Stu Jackson and Maine
Sail as well as others
Thank you Stu and Maine
Sail and others,
This explaines the different 100% charged readings I get from My Victron BMV 600S Battery monitor and the Elite Power BMS read out of my LiFePO4
Batteries house bank.
I noted a difference (the longer I stayed away from a dock
connection or ran my genny to fully charge my house bank ) between the Victron mounted in my pilot house and the Elite display mounted right next to the house bank in my master cabin
. I had no idea why the difference and a self correcting problem ???? made it more challenging to understand.
I came to rely on the Elite Power BMS ( EPBMS) and recorded as much as a 24 % difference with the Victron showing 30.6 % SOC and the EPBMS showing 55% capacity.
At the opposite end I had the EPBMS displaying a 82%% capacity and the Victron displaying 100% SOC at the worst extream during the cruise
Not being electrical
by experience I was concerned as this was in my first weeks on cruise
with my new to me LiFePO4 Batteries.
With 1260 amps of House bank and 1000 amps programed as my usable bank, I was always safe re over and undercharge.
I can trick/force , connect or disconnect a second 80 amp charger
to top off my bank manually and did not under stand the correction of the Victron "SOC" to be within a few percentage points of the Elite Power System "Capacity's" display after I had been on shore power
for a while or topped off my batteries to full charge ( 3.55 volts each )
My ultimate certification
that my house bank is fully charged is my top end bleeding off boards (Elite Power Systems stand-alone cell balancers # BL40 ) that show a red light when individual cell voltage goes over 3.55 volts. and they begin to bleed off charge to allow the slower cells to catch up and all become equal. When I begin to see these come on I monitor the second charger
and am sure to shut it off if I had just " fooled it by turning it off and on " and it is putting out too much amperage for the little boards to handle.
I still do not fully understand all of this , but will re read , study and use this knowledge next season to get a better use of my Victron and want to THANK YOU for this important info.
Again TKS Maine Sail and Stu Jackson as well as others who posted this in the other forum....important info for LiFePO4 batteriy monitoring