Victron Shunt settings. Help please.

[mvweebles]

Right now, I'm pulling drywall at our house and the only power we have is a simple 100w panel driving a 100ah LFP battery via a Victron 75/15 MPPT. I also installed a Victron Smartshunt. All this to run a small fridge and recharge my cordless tools which has been invaluable.

I cannot get the monitor to read properly.

First. It's bright sun here today. Gorgeous day to pull Sheetrock

#1. At 11:30 this morning, shunt showed showed system voltage of 12.83v and consumed AH of 60.6ah.

#2. One hour later (12:41) voltage has increased to 12.97v so clearly it's receiving a charge from the MPPT, but the AH consumed continues to increase negative (as does the SoC).

#3 for reference, here are my battery settings on the shunt.

#4. And the settings on the MPPT

So the system is charging fine but the readings are not correct - AH consumed are not adjusted for solar charge from MPPT. What am I doing wrong?

Thanks in advance

Peter

 

[more]

first set mppt charger on lifepo4 not used defined.
second on 12,83v battery is on 5-10%

set charging 14,4

 

[rslifkin]

Is the ground for the MPPT going through the shunt? If anything is grounded directly to the battery and not through the shunt then it won't be measured.

 

[Delta Riverat]

And you need to cancel the equalization.

 

[luna]

First, I don't own any Victron gear.

From your displayed values, I would at least do these things to improve accuracy.

Set Peukert Exponent to 1.0 or whatever your battery manuf. says it is. 1.25 is a typical lead acid value.

Set Charge Efficiency to 98% or whatever the battery manuf. says.

If possible, set Auto Equalize to never, or get an understanding of what it is and set it correctly.

Then I think you need to get the battery to fully charged and manually set the current state of charge to 100%.

Read to find out what the actions mean for Sych SOC to 100% and Battery SOC on Reset and chose if you want to implement these actions.

Set all other parameters to whatever the battery manuf. recommends.

RTM.

Hope this helps.