If the battery is not fully charged or if the automatic synchronisation does not happen, the state of charge value will start to drift and will eventually not represent the actual state of charge of the battery. The following parameter (s) will have an effect on automatic synchronisation if they have been set incorrectly:
Fully charge the battery and see if the state of charge eventually indicates 100%. Another possibility is that the charged voltage setting should be lowered and/or the tail current setting should be increased. It is also possible that the battery monitor synchronises too early.
Incorrect state of charge due to a synchronisation issue: The state of charge is a calculated value and will need to be reset (synchronised) every now and then. The synchronisation process is automatic and is performed each time the battery is fully charged.
If the negative of a load or a charge source is connected directly to the negative battery terminal or the “battery minus” side on the shunt, their current will not flow through the battery monitor and will be excluded from the overall current reading and the state of charge reading.
Settings can only be changed if the battery monitor is running on the most up to date firmware. Update to the latest firmware with the VictronConnect app. 10.2.
If this is the case change the following settings: Increase the “ charged voltage " to slightly below the absorption charge voltage. For example: 14.2V in case of 14.4V absorption voltage (for a 12V battery). Increase the “ charged detection time ” and/or decrease the "tail current" to prevent an early reset due to passing clouds.
smart mppt 100/15 showing different battery voltage to actual battery …
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If the gross inaccuracy stated above is the best that can be done, then SOS% AS CURRENTLY ENUMERATED SHOULD NOT BE USED OR DISPLAYED. The battery voltage will be a far better guide to charge levels …
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An incorrect state of charge can be caused by a variety of reasons. Incorrect battery settings. The following parameter(s) will have an effect on the state of charge calculations if they have been set up incorrectly: Battery capacity. Peukert exponent. Charge efficiency factor. Incorrect state of charge due to a synchronisation issue:
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Battery monitors also collect and display helpful data such as battery voltage, power consumption, estimated remaining runtime, current consumption, battery temperature, and more. How a Battery Monitor Works. …
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2 · Voltage Sag Under Load: Voltage sag is the temporary reduction in voltage experienced when a battery is under load. Aging batteries exhibit more significant voltage sag due to their decreased capacity and increased internal resistance. For instance, a study published by the Journal of Power Sources (2021) indicated that aged nickel-metal hydride (NiMH) batteries …
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Since the battery voltage is significantly lower than the bus voltage or the AC voltages, the battery voltage divider is likely to have fewer resistors total. So look for a shorter string of M2012 identical value resistors. You could try cleaning off any dust (perhaps with methylated spirits), and coating with a PCB lacquer to see if ...
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DOI: 10.25236/ajets.2023.060904 Corpus ID: 261499317; Battery voltage fault diagnosis mechanism of new energy vehicles based on electronic diagnosis technology @article{Sun2023BatteryVF, title={Battery voltage fault diagnosis mechanism of new energy vehicles based on electronic diagnosis technology}, author={Baowen Sun}, journal={Academic …
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You need to use your DMM (digital multimeter) direct on the MPPT terminals and the battery terminals to see if the voltage is higher at the MPPT than at the battery. If the DMM reads high then you have a poor connection somewhere such as the MPPT terminals or other connections, on either positive or negative cables. You need to check where the ...
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Issue with the MPPT reading battery voltage
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State of charge not reading correctly
My state of charge reading has not been accurate since installing the bmv 712. I can be at 12.2v on the battery and the state of charge will read 100% or there abouts. All wiring is correct and the parameters have been set correct via the app.
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Incorrect battery voltage on inverter display.
Since the battery voltage is significantly lower than the bus voltage or the AC voltages, the battery voltage divider is likely to have fewer resistors total. So look for a shorter string of M2012 identical value resistors. …
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SOC% reporting incorrect result. Bug?
If the gross inaccuracy stated above is the best that can be done, then SOS% AS CURRENTLY ENUMERATED SHOULD NOT BE USED OR DISPLAYED. The battery voltage will be a far better guide to charge levels on LiPO5 batteries because this is (LiPO4 unlike most batteries) a pretty accurate measure of level of charge. This could easily be ...
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My state of charge reading has not been accurate since installing the bmv 712. I can be at …
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The Complete Guide to Battery Nominal Voltage
Learn what battery nominal voltage is, how it affects performance in smartphones, EVs, and renewable systems, and why it''s crucial for battery efficiency. Tel: +8618665816616; Whatsapp/Skype: +8618665816616; Email: sales@ufinebattery ; English English Korean . Blog. Blog Topics . 18650 Battery Tips Lithium Polymer Battery Tips …
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Instead of buying a whole new display, you could just measure your battery voltage at various percentage levels. The fundamental issue with relying on voltage as an indicator of state of charge is that discharge-voltage curves are non linear. So you''ll have the same issues estimating range using voltage.
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I checked the voltage at every place between the MPPT and the battery and I found that the voltage from the MPPT, the voltage on both sides of the fuse, the voltage at the buss bar, and the voltage at the battery are all the same. The difference seems to be that the MPPT is simply reporting slightly higher voltage than the volt meter is reading ...
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Victron BMV-712 displays inaccurate State of charge
Post a screenshot from VictronConnect showing the Battery settings screen …
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10. Troubleshooting
If the battery monitor does not synchronise automatically, one possibility could be that the …
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State of Charge Value Showing for my LiFePO4 Battery is Not …
At the time I took the screen shot, my charge controller and inverter were both showing about the same voltage as the shunt, around 14.4V. I have 2 new Li Time batteries of 200 Ah each, connected in parallel. One side of the shunt is connected to the negative terminal of one of the batteries with the other side connected to the inverter.
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I had a Luna/Bafang 860C display on my Luna/Bafang BBSHD. It went bad a few days ago. Would not turn on, spoke with LunaCycles support, ended up buying a new 860C display from Luna. The new display Voltage readout consistently shows 51.2V on a battery that is charged to 54.7V according to my multimeter.
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10. Troubleshooting
If the battery monitor does not synchronise automatically, one possibility could be that the battery never reaches a fully charged state. Fully charge the battery and see if the state of charge eventually indicates 100%. Another possibility is that the charged voltage setting should be lowered and/or the tail current setting should be increased.
Learn More
