So I believe connecting the Va1 wire at the positive terminal of the fourth battery will give me the voltage of the middle of the string (four batteries). They said I don't have to connect the Va2 wire if I have a single string. OK I spoke with what I would consider lower level tech support at Schneider. When charging you will see voltages as high as 60 volts, and under discharge as low as 48 volts. However it can as easily miss a problem like battery #2 and battery 7 are both bad and cancel each other out and you will not see a problem other than Total Battery Voltage would be either lower or higher than normal.īut here is a catch, There is no such thing as a normal voltage. In theory that means your batteries are in need of Equalization and further investigation nis needed to see what is going on. As that happens in theory, it should see the V1-V2 go from 0 volts and keeps up to 1 volt, or down to -1 volt. However in theory with each cycle your batteries will get out of balance. All it sees is 12-batteries grouped together x 2. A 48 volt battery are 24 2-Volt batteries in series. Your 6 volt batteries are really 3 2-Volt battery cells crammed in a common box wired in series. It does not tell you which battery or batteries are in trouble, and it can miss a problem. The issue I take with them is it has 24 huge holes you could drive a truck through. Does not tell you a lot other than to take a closer look and see what is wrong. Think of it like a Check Engine Light in your car. It is basically a Lazy Man way to get out of measuring Specific Gravity and individual battery voltage so frequently. Ideally it should be 0-Volts if every battery voltage is equal. The V1 - V2 voltage can be used to determine battery health or Balance. Only a hydrometer can do that on a working system. Your Monitor will then use that voltage to determine State of Charge. Batteries are Balanced or at least leads us to believe they are.Ģ7.2 + 27.2 = 54.4 volts. Now you do some simple math in the Black Box Monitor:Ģ7.2 - 27.2 = 0 volts. In a perfect world both V1 and V2 are equal. It also measure the voltage of batteries 5 to 8 and call it V2. OK your Monitor takes two voltage readings: 1 is the voltage of batteries 1 to 4 and let's call it V1. We connect the Monitor to Battery #1 Negative post, Mid Point on the Inter-Cell Connector between Battery #4 and $5, and last connection to the Positive post on battery #8. The Negative Output is battery #1, and Positive Output is battery #8. We put Number Stickers on them from 1 to 8. OK you have 8 6-Volt batteries wired in series to make a 48 volt battery. Does this midpoint monitoring do anything for me and if so how? I have eight batteries in series making a single 325ah 48v bank. What would I possibly gain by knowing midpoint voltages in my single string of batteries? The manual though shows an illustration for installing the midpoint battery leads in both parallel strings and just one string. Obviously this is a great feature for parallel strings of batteries. This battery monitor has leads for midpoint voltages. With the latest firmware does the battery monitor take over the charging parameters of the CC and control when it goes to float? For example, can I configure it to put back say 110% of the amp hours removed from the previous charge cycle? To do this currently (using my Bogart battery monitor) I have to set the CC float voltage to the same as my absorb voltage (during the summer I use a lower voltage than absorb). ![]() I will continue to use my MPPT-60-150 charge controller. Schneider is sending me their Monitor to install with my new XW system. Looking for a couple tidbits of info from anyone using the Conext Battery Monitor with their Schneider charge controller.
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