Charged Voltage setting on SmartShunt

[Wol (Colin)]

Hello. I am having some trouble with my SmartShunt showing different SOC to the battery BMS.

The battery is an Amptech 100Ah Lithium type with bluetooth and active BMS.

It is charged by a Projecta IC25RV mains, and a Projecta IDC25X Intelli-Charge for solar and alternator.

A SmartShunt keeps track of the ins and outs, but obviously does not control charging.

There is a high current (50 Amp) Anderson connection installed by a third party which I discovered bypasses the shunt. (Don’t ask, I will fix it when I finish travelling, it is quite a job). This connects to a small inverter for occasional use and coffee machine. It is normally isolated by its own master switch. Obviously if it is used the output is not metered and I occasionally have to sync the SOC on the shunt to the Battery BMS values. Annoying but have to live with it at the moment.

Notwithstanding the above, Recently the SS SOC has been significantly less than the BMS SOC. Checking the battery settings in the shunt showed a number of values were back at defaults for Lead Acid. I assume I inadvertently made some changes by mistake, or reset it. I don’t know but no one to blame but me .

I have corrected all values except for “Charged Voltage”. Currently it shows 13.2v. I am sure this is wrong but there seems to be some confusion on the web between “charging voltage” and “charged voltage” parameters.

What should this value be set to on my SmartShunt?

regards

[GUMPY (Julian Tether)]

I run mine with a charged voltage if 14.2v

When in use the BMS and SS are within 2% of each other.

[pwfarnell]

Have a read of these FAQs

Battery monitor jumping to 100% or reporting a high SOC with low Volts / the BMS shuts down

This topic covers the reported SOC being out of sync with the actual battery voltage or state. It covers BMV battery monitors, SmartShunts, Lynx BMSs and Lynx Shunts and will just be called shunt below. It is also assumed that the shunt is monitoring the domestic / house / cabin battery bank and not engine start / bow thruster / winch / caravan mover battery banks. The problems may be one or more of the following and is often linked to mobile applications with small solar systems. The SOC jum…

Shunt / battery monitor not reading the correct SOC/ Amps, missing solar, decreasing daily or other misreading problems

This topic covers the SOC / Amps reported by BMV battery monitors, SmartShunts, Lynx BMSs and Lynx Shunts and will just be called shunt below. It is also assumed that the shunt is monitoring the domestic / house / cabin battery bank and not engine start / bow thruster / winch / caravan mover battery banks. The problems may be one or more of the following The SOC decreases daily despite the solar charger or other charger(s) working. The SOC increasing when discharging and falling when charging…

[Wol (Colin)]

Thanks for that. I read those two topics. So far as I can tell there are no wiring oddities other than that I mentioned.

I will try upping the ‘charged voltage’ setting.

regards