I have two Victron AGM Deep Cycle 60Ah batteries wired in parallel and connected to a SmartSolar 75 | 10 and a SmartShunt.
It all works pretty much ok, apart from the batteries not always reaching float stage.
As suggested in this support forum, the battery profile I am using is "Gel Victron deep discharge(2)" as it matches the voltages indicated by Victron (float: 13.5/13.8).
Some time ago I used the batteries (down to ~90% as indicated by the smartshunt). Then they recharged to 100% over a few (relatively sunny) days and I could see the charge controller happily flashing as float.
If untouched, normally it goes to bulk a few hours after sunrise and then switches to float.
I recently re-used the batteries (down to ~97%). Again, they recharged back to 100%, but the charge controller doesn't reach the float stage.
The batteries are at about 13.5v.
Just, as a note: weather has been terrible lately, so all this time the charge controller is not going into float we've had rain/fog, etc. so there is extremely low light hitting the panel.
Also, in the history, the controller is indicating some daily consumption, but I haven't been using the system in the past few days and there is no loads attached... not sure why this is happening.
Will low light prevent float?
Shall I lower the float voltage, as the preset keeps it at 13.8?
Is just that indicated consumption preventing it all?
These are some stats from today:
History from this week and last week:
Last week, all seems ok here:
Just to add some more variables :-D
Up to a few weeks ago I was using only one battery, and everything was working perfectly (float and all).
This behaviour started when I connected the batteries in parallel. Also, I don't remember seeing any consumption (unless I was actually using the system) with a single battery.
I added the second battery later on. I know it is not ideal, but the batteries are same model, from the same shop, they have about a month-ish usage difference in time (and zero cycles both).
