Victron bmv 712 setup8/13/2023 ![]() Just another tool in the drawer.We want to be able to keep better track of the power going in and out of our batteries when we are out cruising and heard good things about the Victron Smart Battery Monitor BMV-712. I do believe that a Battery monitor is useful but would not want to depend on it for something serious. I will ping overkill back and see if they have figured out anything. My thinking is they will never show a true SOC but just an WAG (wild ass guess) depending on the parameters you have inputed during setup. If you are successful in synchronizing these apps let me know how how you did it. On the BMS the SOC (XiaoxiangBMS App) 100% is reset when the cells get over 3.5oov on average (so 14.0V for a 4S battery) I think I will have to repeat this process every so often as the readings slowly drift apart. I did notice in the Victron app there is a manual "Synchronize SOC to 100% " so next time my batteries are at 100% (based on the XiaoxiangBMS App) I am going to hit the Synchronize button. I took a look at my Victron setup and see the same issue/feature, I haven't tried to address it but will now. This is the reply I got from the BMS supplier. But using a voltage meter the BMS seemed to be the more accurate voltage for me? Sometimes the battery voltages are off between the victron and the BMS. I don't use the Xantrex charger much since it doesn't have a Lifpo4 setting. My charge comes from Victron solar controllers (2) 95% of the time. Not sure why but just assuming they don't measure the AH the same way when charging. Each 272AH battery has a BMS (2 Total) and I have a victron BM712 and they never track together after the first cycle of discharge unless they are charged back to "100%SOC". I built a couple of LifePO4 batteries in 2021 and they have held up well. If you are looking, suggest you hop right over and check it out. There were also some good sale prices on the website today. ![]() I notice that Li Time now offers several more battery options including self heating batteries. Li Time settings mirrored the Battle Born settings, which I found on the AMSolar website, with exception of the charged voltage. Also the efficiency, discharge floor, and Peukert settings are different for lithium vs conventional. The Battle Born setting for that is 14.1, which of course is higher than the default setting for conventional batteries. Pls confirm with the above requirements with the manufacturer as they are more familiar with their products." (Ampere Time support)Īs to the info sent by Li Time, the charged voltage seemed high to me. "And I would like to remind you that to charge our 12.8V 300Ah LiFePO4 battery, we recommend the charger supporting Lithium Iron Phosphate Battery charging mode(LiFePO4 mode).Īnd the DC charging voltage should between 14.2V to 14.6V. I created a support ticket and here is the information they sent me:īattery capacity: 600Ah (that would vary according to your setup) I had not updated it completely for my two 300 Ah Ampere Time batteries. ![]() ![]() But then I started digging in further to the gear settings for the "battery" on the app. This cured the false indication of 100 percent charge after only 30 minutes of solar. I've been getting bogus charge information on my Victron BMV 712 lately (it showed an unrealistic full state of charge after just a small amount of solar in the morning.) This got me to digging into the app settings for the BMV 712 Smart Monitor.ĭid a full charge of the batteries with solar and inverter/charger to float and then synchronized the battery monitor. First of all, Ampere Time has been rebranded as Li Time. ![]()
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