How to Configure Unbalanced Lithium Batteries.

Modified on Mon, 10 Jul, 2023 at 1:28 PM

When it comes to batteries being out of sync, by following the below steps, you can help to ensure that your lithium batteries are properly configured and balanced. This will help to extend it's lifespan and improves performance.

Rule of Thumb: Do not mix different types of lithium batteries i.e. Only connect AM2 with AM2 etc.

Firstly, confirm the battery voltage, not SOC, use a volt/multimeter to measure the correct voltages of the battery pack.

If it's a bit low or the voltages are significantly different, that means the pack is unbalanced; you might have to try and balance it manually by force-charging the battery, just to get it to 100%.

Ensure that the firmware is up to date and all the batteries in the queue is on the same changelog.

Now follow the steps below to reconfigure battery charge parameters. (For example: AM2)

For other Hubble batteries, please see manual or website for correct voltage settings.

1) Disconnect the CAN communication cable.

2) Change the battery type of the inverter to AGM V.

3) Please input the Float, Bulk and equalization Voltage (Eg. AM2 = 53,8Vdc).

4) Then set the DC Low Voltage to 44Vdc (For AM2).

5) Kindly charge up battery until the inverter stops charging the battery at 53.8Vdc, this may take some time as the BMS will do a cell balance or equalization at full voltage i.e. 100% SOC.

6) Once inverter has stopped charging, reconnect your CAN cable, go back into your inverter battery menu setup and activate the Lithium settings and CAN communications.

Once the battery pack is fully charged, it will be balanced, you can then go ahead and charge it as usual. The BMS will reconfigure your batteries and resync the pack...

If some unknown reason the battery/batteries are still not charging correctly, then it will need to be returned to your local Hubble Lithium Service Department for an Assessment.

In Conclusion:

It is important to store lithium batteries in a cool, dry place.

Lithium batteries can self-discharge, so it is important to check the voltage of the battery pack periodically.

If you are unsure about how to configure or setup your batteries, it is best to consult with a qualified Installer or Electrician.

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