Shunt SOC wrong

[Fishinbrine]

Well I have had the battery on the bench with a charger with a 'refresh' mode specifically designed to recover AGM batteries, after 23 hours it has added 50ah to the battery, when I pause the charger, applied a load to the battery of 60w for 5 minutes the battery voltage reads 12.11V
I have resumed the refresh mode and hopefully I have managed to save the battery and will refit to the van tomorrow at some point.

Just to be sure I have reset all Victron components in the van and will adjust the settings when I refit the battery based on a combination of your advice, and will see if the battery actually behaves how it should.

Thanks as always for all your advice - if this is no good I may just cut my losses and get a Lithium battery and then change the Victron components to their default Lithium settings - am I ok with the default settings or should they also be adjusted really? I have Victron MPPT solar, Shunt and B2B and Victon IP22 AC charger 15a version.

 

[Skyliner33]

Well I have had the battery on the bench with a charger with a 'refresh' mode specifically designed to recover AGM batteries, after 23 hours it has added 50ah to the battery, when I pause the charger, applied a load to the battery of 60w for 5 minutes the battery voltage reads 12.11V
I have resumed the refresh mode and hopefully I have managed to save the battery and will refit to the van tomorrow at some point.

Just to be sure I have reset all Victron components in the van and will adjust the settings when I refit the battery based on a combination of your advice, and will see if the battery actually behaves how it should.

Thanks as always for all your advice - if this is no good I may just cut my losses and get a Lithium battery and then change the Victron components to their default Lithium settings - am I ok with the default settings or should they also be adjusted really? I have Victron MPPT solar, Shunt and B2B and Victon IP22 AC charger 15a version.

From memory you will need to adjust the default settings.

 

[t0mb0]

Well I have had the battery on the bench with a charger with a 'refresh' mode specifically designed to recover AGM batteries, after 23 hours it has added 50ah to the battery, when I pause the charger, applied a load to the battery of 60w for 5 minutes the battery voltage reads 12.11V
I have resumed the refresh mode and hopefully I have managed to save the battery and will refit to the van tomorrow at some point.

Just to be sure I have reset all Victron components in the van and will adjust the settings when I refit the battery based on a combination of your advice, and will see if the battery actually behaves how it should.

Thanks as always for all your advice - if this is no good I may just cut my losses and get a Lithium battery and then change the Victron components to their default Lithium settings - am I ok with the default settings or should they also be adjusted really? I have Victron MPPT solar, Shunt and B2B and Victon IP22 AC charger 15a version.

Sounds promising on the battery, it's unlikely to be too knackered if it's taken 50Ah so far, keep going and see how much it takes.

On your 60w test, if that 12.1V was taken during, or shortly after, the load was being applied then it will be affected by the natural voltage sag under load. I'd fully charge it, see how much goes in and then do your 60w test and measure voltage during load and after settling.

 

[Fishinbrine]

Well after a weekend on a AGM refresh charger only 57ah went in the battery, and after a short 60w load voltage was 10.97volts.
Alarmingly I brought the battery from Halfords (trade card gave 25% off leisure batteries!) I have just taken the battery back they 'tested' the battery and sent me out the door with a new replacement battery!
Have to say excellent service, no questions asked and a new leisure battery to go in my van!
Just need to get these Victron settings nailed on and will get it all back up and running ready for the year ahead!

 

[t0mb0]

Well after a weekend on a AGM refresh charger only 57ah went in the battery, and after a short 60w load voltage was 10.97volts.
Alarmingly I brought the battery from Halfords (trade card gave 25% off leisure batteries!) I have just taken the battery back they 'tested' the battery and sent me out the door with a new replacement battery!
Have to say excellent service, no questions asked and a new leisure battery to go in my van!
Just need to get these Victron settings nailed on and will get it all back up and running ready for the year ahead!

Oh, that is a winner! I might take my eight year old factory leisure AGM back to VW and see if they do the same...

 

[Dellmassive]

Well after a weekend on a AGM refresh charger only 57ah went in the battery, and after a short 60w load voltage was 10.97volts.
Alarmingly I brought the battery from Halfords (trade card gave 25% off leisure batteries!) I have just taken the battery back they 'tested' the battery and sent me out the door with a new replacement battery!
Have to say excellent service, no questions asked and a new leisure battery to go in my van!
Just need to get these Victron settings nailed on and will get it all back up and running ready for the year ahead!

Result...

 

[Fishinbrine]

Afternoon all, below is a picture of my current setup and also my currently saved settings in my Victron equipment.




MPPT Settings



Charger settings


Shunt settings



I have not yet used the Victron AC Charger so dont have a screen of the settings yet - but i assume that these will also need to be changed.

Hopefully this will then be all good and i wont have any more battery issues this year!!

 

[Dellmassive]

Got a few pics of the battery connections?

 

[Fishinbrine]

Got a few pics of the battery connections?

Not at the moment, the battery is not in the van yet, but its just 2 quick release clamp on battery terminals, both with crimped connections, earth straight to the shunt, and positive to my mega fuse, then to the fuse/distribution box.

 

[Fishinbrine]

And the AC charger

 

[Fishinbrine]

Not got photos of my battery connections yet sorry but they're now just normal bolt on clamp battery terminals with 1 16mm² cable to shunt and 1 to my mega fuse feeding the midi fuse box as indicated in diagram, can't remember for certain if 16mm² or bigger but pretty certain it's 16mm² looking at the cabling orders I have made as they had pre crimped copper sleeve terminals on them.