question

Thanks very much for your help. I am still somewhat confused.

I thought that the MPPT absorption voltage is normally 14.4 volts. Is that correct. Therefore should I be setting the SmartShunt voltage to 14.2 volts or as in the SmartShunt manual where it says that the charge voltage should be set to at least 13.8 volts for normal batteries. What should I set the charge to?

I cannot see the advianced settings option on the Smart Shunt Bluetooth app.

My apologies for my ignorance on these matters.

Thanks, Noel

You asked:

I cannot see how to change the charge voltage of the Blue Smart Charger?

The advanced options were for the charger, not the shunt.

Smartshunt Manual:

https://www.victronenergy.com/upload/documents/SmartShunt/9172-Manual_BMV_and_SmartShunt-pdf-en.pdf

Page 40

10.3.11

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 [22] should be lowered and/or the tail current setting [23] should be increased.

A LFP battery is fully charged @ 14.4V when the tail current has dropped to 0.05C or 5% or 20A in your case, so I recommend you set the tail current to 6% to ensure it syncs.

It is also possible that the battery monitor synchronises too early. This can happen in solar systems or in systems that have fluctuating charge currents. If this is the case change the following settings: • Increase the “charged voltage [22]" to slightly below the absorption charge voltage. For example: 14.2V in case of 14.4V absorption voltage (for a 12V battery)

14.2V vs. 14.4V is 0.2V below absoprtion.