Sterling Power 120Ah Lithium - Victron SmartShunt 500A/50mV Battery Settings

[MrDean]

Hi,
I was wondering if anyone has a similar setup that has the battery settings (obviously I know the capacity) for the Shunt that is working for them?
The Shunt rarely shows the correct SoC once the battery begins to discharge and there is a rabbit hole of information on the WWW.
Thanks

 

[the1andonly]

Here's my settings. not for a Sterling battery Ultramax. Another member Raul has simular values with a different Peukert value. Mine is currently insync +-3% with the Battery BMS. PS i think my Battery bms is slow to move.
.

 

[Raul]

Yes ultramax and similar settings, discharged floor 20%, peukert 1,03, charged voltage 14,2v (winter), charge efficiency 98%, detection time 1min.
The accuracy is within 1% or 4ah, for a 400ah bank. It’s the max resolution the bmv can compute the percentage. This settings are to stay, it’s the best result so far, compared to stock settings. Other batteries can behave different, depending on their resistance and can yield different results. It’s a toss of playing up with the settings, until you get a reasonable result.

 

[MrDean]

Thank you both for your time and comments

 

[the1andonly]

recently checked values and id previously changed peukert 1,04. May tweak to 1.03 and see what happens next year

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[the1andonly]

dont know if this would help anyone but i am now using a SSR (15ma consumption for 2 on) to control the solar input to my votronic controllers. The relays are controled by my bmv712. These are winter settings. This is to allow daily access to van and still turn lights on as apposed to usimg the negative issolator. these are initial settings SOC 40 on 65% off. Any better settings. In summer i will limmit fully charged to 90% and see where that gets me.

 

[Kannon Fodda]

These charged voltages seem very high? Are you confused with the voltage needing for bulk charging?

Sterling Power's instruction notes generally show operating voltage at 13.6V, Charge Voltage 14.2v-14.6V: 14.4 recommended, float 13.4V-14.0V: 13.8V recommended.

 

[Raul]

These charged voltages seem very high? Are you confused with the voltage needing for bulk charging?

Sterling Power's instruction notes generally show operating voltage at 13.6V, Charge Voltage 14.2v-14.6V: 14.4 recommended, float 13.4V-14.0V: 13.8V recommended.

Sorry for being slow, what do you mean exactly by “charged voltages to high”?
The shunt has to have the appropriate values dialled in, taking in consideration all charging sources settings.

 

[Kannon Fodda]

The Sterling Lithium (LifeP04) operates at 13.6V. So that is the charged voltage?

I fitted the Smartshunt some time after Vanbitz had upgraded very pants basic Autotrail electrics on a 2019 van to a 120Ah Sterling LifePO4, Sterling 60A B2B and Victron MPPT solar controller. The Sargent PSU remains with it's basic 13.8 V charger (not smart, not lithium), that Vanbitz didn't see any need to change.

Following similar advice to the above, I had had my charged voltage in the Victron Shunt set to 14.3V. For the last 4 days I've been on EHU. Negligible contribution from solar at this time of year. I've since driven home for a couple of hours and the Sterling 60A B2B in Lithium profile would have been available. Regardless the Smartshunt has consistently decided I have 91% State of Charge, zero current flow, so the battery must be full after such lengthy EHU and B2B. So the high 14.3V charged voltage has to be wrong, preventing the shunt from knowing the battery is in fact full.

 

[Raul]

You are right, the shunt charged voltage is your bulk voltage, detected over a period of time you set. If ehu never reaches 14,3v then it won’t re sync. If your shunt is set at 14,3v and you B2B does get to that voltage, it will synq. The idea is to have all charging sources on equal settings, then the shunt will re sync on all charging sources. You can lower the charged voltage value in the shunt, but you will have to change the other sources settings as well. Otherwise, the shunt will reset to 100% prematurely. From what you are saying, your shunt is out, if no flow of current at 13,6v. The voltage is only a speed charging limiter, you can fully charge at 13,6v as well at 14,6v. Of course the first will take much longer than the later. My primary source of charging is solar, ehu in winter when needed for top up only, and B2B opportunistic. I will never fully charge from B2B, only a top up. I also run different setting in winter compared to summer. In winter I’m restricted by time, in summer I’m not. I can get fully charged at 13,8v comfortably, without stressing the battery at elevated voltages longer than necessary. But I also adjust the shunt values as soon as I change the charging values.
If you can’t have all the charging sources at the same settings, pick one as primary source of charge, the one you use most, and mirror that in the shunt.
Different ppl have different preferences and needs, I do what works for me based on personal experience, and collective knowledge from a wide source of information. There is bound somebody did what I want to do before me, it’s a mater of finding that source.

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