The relay function can be inverted: de-energised becomes energised and vice versa. When the relay is energised, the relay closes, and contact between COM and NO is made. When the relay contact is open, the coil is de-energised there is no contact between COM and NO. The relay has 3 contacts: COM (common), NO (normally open), and NC (normally closed) and are located on the back of the head unit. However, the relay can be configured to also trigger on other conditions, like battery voltage. For more information on the various relay modes and how to configure the relay, see chapter Relay settings.Ī usage example of the relay is to start a generator when the battery state of charge has dropped too low, and then to stop the generator when the batteries have been recharged.īy default, the relay is set to energise when the battery state of charge falls below 50% and to de-energise when the battery state of charge has risen to 90%. This relay can be used as an alarm relay, to start a generator or for other applications. The battery monitor is equipped with a programable relay. In case the battery monitor is going to be used to monitor a second battery, battery bank midpoint or battery temperature, see one of the next 3 paragraphs on how to do this and then go to the Configuration chapter. To read more about the full BMV range & accessories, see this blog. With Bluetooth being implemented in most other Victron Energy products, wireless communication between products will simplify system installation and enhance performance. In order to be fully functional, the battery monitor needs to be configured see the Configuration chapter. With Bluetooth built-in, the BMV Smart is ready for the Internet of Things (IoT) era. The display is active, and Bluetooth is active. Plug one side of the RJ12 cable into the shunt RJ12 terminal and the other side of the cable into the RJ12 terminal on the rear of the head unit. Make sure that the negative of all DC loads, inverters, battery chargers, solar chargers and other charge sources are connected “after” the shunt.Ĭonnect the ferrule pin of the red cable with the fuse to the shunt by pushing the pin into to the “ +B1” terminal.Ĭonnect the M10 eye terminal of the red cable with the fuse to the positive terminal of the battery.Ĭonnect the shunt to the head unit using the RJ12 cable. Tighten the shunt bolt with a maximum torque of 21Nm. Any loads or chargers connected here will be excluded from the battery state of charge calculation.Ĭonnect the negative of the electrical system to the M10 bolt on the " LOAD AND CHARGER" side of the shunt. Note that there should be no other connections on this side of the shunt or on the negative battery terminal. Incorrect auxillary battery voltage readingĬonnect the negative battery terminal to the M10 bolt on the " BATTERY ONLY" side of the shunt. State of charge does not increase fast enough or too fast when charging There is a current reading while no current flows Charge and discharge current are inverted What to do in case of an alarm during discharging What to do in case of an alarm during charging Connecting and monitoring midpoint in a 48V battery bank Connecting and monitoring midpoint in a 24V battery bank Battery bank and midpoint wiring diagrams Saving, loading and sharing settings in VictronConnect Accessing settings via the VictronConnect app Connecting to a GX device and the VRM portal Accessing historical data via the head unit Accessing historical data via the VictronConnect app Auxiliary connection for temperature monitoring Auxiliary connection midpoint battery bank monitoring Auxiliary connection for monitoring the voltage of a second battery I know that you do have to calibrate the BMV every now and then, but with low power usage, a month to lose 5% SOC accuracy seems high.ĭo I need to adjust my BMV to any other settings? I cannot adjust my REDARC DC-DC or my AC Charger Float and Absorbsion Voltages (as far as I can tell). I am not using much power, so my batteries rarely drop below around 70% SOC at the moment, but when recharging them the SOC never reaches 100%, and over time it drifts more out of sync to the point where after a month or so, it is showing ~95% as my maximum (it won't charge when the BMV shows SOC being 95%). Portable Power Tech 30A AC Battery Charger (Absorbsion 14.1V Float 13.5V).Victron 50/100 MPPT Smart (Absorbsion 14.5V, Float 13.6V).REDARC 50A DCDC Charger (Absorbsion: 14.5V Float: 13.6V).200Ah ReLion LiFePO4 battery (recommended charged voltage 14.2-14.6V).
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