Resetting SmartShunt to 100%

[webcraft]

We have a 60ah LiFePo battery we use for a trolling motor. The battery is fitted with a Smart Shunt and is usually charged via a 100W folding solar panel.

The battery can also be charged from shorepower via a port in the side of the battery, but since the initial charge I have avoided doing that as it bypasses the shunt.

Now the shunt shows 26% but the battery indicator lights on the motor are flashing on the 2nd light and the battery shows every sign of being nearly discharged.

I want to charge it to 100% in shorepower then reset the shunt to 100%

Will it automatically reset if I fully charge it then plug it into the solar panel so there is current going through the shunt, or do I have to reset it via the app?

 

[KompetentKrew]

The SmartShunt does have settings for this:

I know yours is a LiFePo battery, but I just want to say that you should exercise great caution messing with these if your battery is lead-acid type, as it's possible to display a much higher state of charge than actual and damage your battery by discharging it too deeply.

You should never need to touch the "Zero current calibration".

 

[shanemax]

Is all this mind numbing data and information progress. Einstein said it takes a genius to make something simpler, but anyone can make something more complex.

 

[webcraft]

Is all this mind numbing data and information progress. Einstein said it takes a genius to make something simpler, but anyone can make something more complex.

A smart shunt just measures electricity in and out, it is a fuel gauge. The trolling motor is a lot simpler than a petrol outboard, and a lot cheaper. Fuelled by sunlight, it is a lot less polluting as well.

 

[webcraft]

The SmartShunt does have settings for this:

I know yours is a LiFePo battery, but I just want to say that you should exercise great caution messing with these if your battery is lead-acid type, as it's possible to display a much higher state of charge than actual and damage your battery by discharging it too deeply.

You should never need to touch the "Zero current calibration".

Many thanks for this. Personally, I would never use a LA battery for this purpose, as get-home-itis almost certainly means over-discharging it at some point.

 

[KompetentKrew]

Many thanks for this. Personally, I would never use a LA battery for this purpose, as get-home-itis almost certainly means over-discharging it at some point.

I'm sorry for being unclear. I didn't intend to say anything about using lead-acid batteries with trolling motors.

I just meant that you should be very careful about messing with the SmartShunt's state-of-charge settings if it is monitoring a lead-acid or AGM battery, as it's possible to display a much higher state of charge than actual and damage your battery by discharging it too deeply.

It's important to ensure that a lead-acid system cannot get in a situation where the battery is half discharged but the SmartShunt is showing 100%. Victron actually improved these options a couple of years ago - it was easier to screw up with the previous two (not three) "Battery SOC on reset" options.

 

[webcraft]

I'm sorry for being unclear. I didn't intend to say anything about using lead-acid batteries with trolling motors.

I just meant that you should be very careful about messing with the SmartShunt's state-of-charge settings if it is monitoring a lead-acid or AGM battery, as it's possible to display a much higher state of charge than actual and damage your battery by discharging it too deeply.

It's important to ensure that a lead-acid system cannot get in a situation where the battery is half discharged but the SmartShunt is showing 100%. Victron actually improved these options a couple of years ago - it was easier to screw up with the previous two (not three) "Battery SOC on reset" options.

Understood. And as the shunt is currently (apparently) overstating the SOC I would probably have ruined a lead acid battery by now.