![]() ![]() We recommend the use of the state of charge readout for accurate battery monitoring. If the load is fluctuating heavily, it is best not to rely on this reading too much, as it is a momentary readout and should be used as a guideline only. For the discharge floor setting see the Discharge floor chapter. The discharge floor is by default set at 50%. This is the “time-to-go” readout and is the actual time left until the battery is discharged to the set “discharge floor”. The battery monitor estimates how long the battery can support the present load. For more information, see the Synchronising the battery monitor chapter. This mainly occurs when the battery monitor has just been installed or after the battery monitor has been left unpowered and is powered up again. Please note that if the "Consumed Ah" reading indicates three dashes: “-” this means that the battery monitor is in an unsynchronised state. The battery monitor keeps track of the Amp-hours removed from the battery compensated for the efficiency.Įxample: If a current of 12A is drawn from a fully charged battery for a period of 3 hours, the readout will show -36.0Ah (-12 x 3 = -36). The power drawn from or received by the battery. Keep in mind that the battery monitor will always indicate the total battery current, being the current traveling into the battery minus the current traveling out of the battery. This is current coming from charge sources. A positive current means that current is going into the battery. A negative current indicates that current is taken from the battery. This is the actual current flowing in or out of the battery. This is the terminal voltage of the battery. Please note that if the state of charge indicates three dashes: “-” this means that the battery monitor is in an unsynchronised state. A fully discharged battery will be indicated by a value of 0.0%. The state of charge is the best way to monitor the battery.Ī fully charged battery will be indicated by a value of 100.0%. This is the actual state of charge of the battery in a percentage and is compensated for both the Peukert efficiency and charge efficiency. The battery monitor takes all these factors into consideration when calculating the state of charge.Īux input reading (starter battery, midpoint or temperature) In other words: the charge efficiency is less than 100%. And to make things even more complicated: when charging a battery more energy (Ah) has to be ‘pumped’ into the battery than can be retrieved during the next discharge. To complicate matters, the effective capacity of a battery depends on the rate of discharge, the Peukert efficiency, and, to a lesser extent, the temperature. Integration of this current over time, if it was a fixed current, boils down to multiplying current and time and gives the net amount of Ah added or removed.įor example, a discharge current of 10A for 2 hours will take 10 x 2 = 20Ah from the battery. The battery monitor continuously measures the current flow in and out of the battery. The main function of the battery monitor is to follow and indicate the state of charge of a battery, to be able to know how much charge the battery contains and to prevent an unexpected total discharge. Incorrect auxillary battery voltage reading 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 VictronConnect app Auxiliary connection for temperature monitoring Auxiliary connection midpoint battery bank monitoring Auxiliary connection for monitoring the voltage of a second battery ![]()
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