These settings will make the battery pack stay below and never reach 100 % SOC. Repeated absorption interval: 14.00 Days.The current settings used after configuring the Multiplus using VE.Bus But I later reconsidered and ordered my own since I might fiddle with the settings after some testing and adjust them over time. My initial plan was to borrow a USB to VE.Bus converter. I would also not be able to set the charge curve with the dip switches. The charge profile for lithium using dip-switches would set the absorption to 14.1 V and the float to 13.8 V which is too high for my preference. But that would only enable some settings and would not allow the charge profile that I wanted to use. There are some dip-switches on the Multiplus. But I will have to monitor the temperature to see if there will be cooling issues. I don’t expect to use either the inverter or the charger all the time. The mounting is not ideal in a cabinet, and there might be some issues with cooling. The only thing that remained was to program the Multiplus and then do the actual mounting. The mounting and wiring were all prepared for the Multiplus. Mounting and configuring MultiPlus inverter/charger High voltage alarm On: 14.5V, Off: 14.2V.High voltage relay On: 14.6V, Off 14.2V.Low voltage relay: On: 11.6V, Off 11.7V.I will start with the recommended settings from Victron and see if I need to adjust them over time These settings are slightly different from the recommended settings from Victron. Some friends have been using Pukert exponent 1.03 and Charge efficiency factor: 98% with excellent results together with their lithium Winston cells or Winston 12V batteries. The BMV-712 needs some specific settings when you use the BMV with Lithium batteries since they have a much higher charge efficiency. But I figured that if an overvoltage event is triggered, I still want to investigate a bit before the battery pack is connected again. If the overvoltage is triggered, I have to manually connect the battery by pushing the remote battery switch. Since I am using the ML-RBS 7700 I am not using inverted settings on the BMV-712 and the NC (Normally Closed) relay connection from the BMV-712 to the Contura switch. BMV-712 (NC) -> Contura Remote switch (Pin 1).I’m posting them below for others to see as well. I got a couple of questions from the facebook group of the wiring. To not over complicate the wiring I ran the wire from the battery monitor to the remote switch instead of to the battery switch. But after researching a bit, I figured out how to use the relay on the BMV-712.īy connecting a relay cable from the battery monitor to the switch of the ML-RBS remote battery switch, I could trigger the ML-RBS to disconnect the battery if the BMV-712 measures an overvoltage event on the battery pack. The manual of the BMV-712 battery monitor is not very detailed about the relay functionality. I am not overly concerned about compression since I will use very conservative settings for both over voltage and under voltage.īut one of the comments was to automate overvoltage protection on battery pack level using what I had already installed. One was to add compression to the battery pack that I will do some time later. I got a lot of positive comments and also some good recommendations. I can recommend anyone considering lithium to join this Facebook group. After my installation of the battery pack, I posted a comment regarding my Lithium installation. There is a great Facebook group regarding lithium batteries on boats. Some small parts remained that I needed to complete. Most of all the electrical wiring is complete.
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