Victron 12 v agm battery discharging quickly

DIY
, ,
1

Should I use Recondition stage to improve the charge holding capacity of my Victron 12 v AGM I have three identical batteries connected in parallel 330 amh any help will be much appreciated.i have a Victron 20amp charger which has the Recondition stage on the settings. The setup is on my sailing boat the batteries are 5 years old and seem to lose voltage very quickly
Mike

2

Which AGMs do you have? Victron has done several different versions of them over the years.

5 years is a good run for AGMs to be honest; you wouldn’t typically run a recondition cycle on an AGM battery unless the user manual specifically says it’s okay, but you could certainly charge at a higher voltage for a bit to help. The maximum charging voltage permitted should be printed on the side of the battery, will most likely be somewhere between 14.7v and 15.0v depending on the specific model of Victron AGM you have.

3

image
image1920×1440 415 KB

This a picture of the top of one of my batteries all 3 are the same all added together June 2021 I do run electric sheet winches and when sailing locally I do a lot of tacking. Our marina gives us access for 3 hours over high tide. I would appreciate your advice. I am tempted to go for lithium batteries but it would be much easier to swap like for like very simple.
BAT 412101084 12V-110AH.i tried replying with a picture but it was returned because i didn’t have permission to respond the way i did.
Mike

4

Okay, yeah I’ve got one of those (old) on my floor, here’s the charging specs for them:

IMG_20260409_085451129
IMG_20260409_0854511291920×1080 177 KB

So, don’t equalize/recondition, but you can try boosting your charge voltage to 14.7v for a while to see if you can pack some more power into the plates.

5

Thank you, Justin. I’ll give it a try tomorrow when I go to the Boat as regards, Mike.

6

Victron battery
Victron battery1920×1440 400 KB

IMG_2721
IMG_27211125×2436 204 KB

IMG_0625
IMG_06252048×1536 251 KB

7

Hi Justin.

I have just installed three of these please advise what voltage should I charge them at.i have Victron 20A charger bsc ip22 12/20 they are connected in parallel. Having bought new 2 of the old one was checked as ok but the third was faulty which must have been accountable for the discharge rate.i have a smartBMV 712 smart also smart solar MPPT 100/20 48V WITH 240W solar 4x60 in series

And the Victron app on my phone please advise on the best settings.

Mike

8

Hi the batteries I. Have are BAT412101085

9

Yes, the charging recommendations are printed directly on the battery! Same ones I showed a photo of, as far as I can tell.