question

(This on the demo page because I am not next to my charger now)

I also moved the voltage of absorption and float on the advise of someone else, according to the value of the battery itself : cyclic use 14,4v-15v

The voltage shown is high.

Normal for AGM is absorption 14.4, float 13.8. Setting the voltage too high can damage the battery.

When a fully charged AGM is off charge, resting voltage should stabilise at about 12.7V.

It's a good idea to set equalisation voltage to the same as absorption, or lower as a safety precaution, in case you turn it on accidentally.

Initial impression is that it's working correctly, was more charged than you thought.

However it would be good to see what's also set when you switch on expert mode.

Here is the expert panel

Ok what you are saying makes sense... Although the guy who sold it to me made the measurements with me and told me that 12,75vbfor that one might be low and was supposed to be around 13v

According to the datasheet I have, the float voltage is at 2,27v @ 20°c I guess it is a 6 cells battery (like most of 12v even though the datasheet don't mention it)

So 2,27v*6=13,6v

So that's the given value for float voltage I guess.

But then how to explain than thick battery charges like 20% of it's capacity out of a 50wh day of sun ?

Here are the records of the app since I setup that new battery.

Here is the label of the battery seating both voltage for storage and cyclic use

Looks really good. Can see your changes worked.

You're within the maker's values. Generally absorption is better towards the lower end of the acceptable range.

The bars have three regions, shown by the shading. Clicking on them brings up descriptions/numbers. But the lower region is bulk charge. Middle, absorption, top float.

The battery is barely dropping below float overnight, so very little use, borne out by the power stats. This means that the charger can charge up to absorption voltage, then have a variable absorption period, then switch to float.

Remember also that power in W is a rate. Total power is Whours. Rate multiplied by time.

Ok thanks a lot for your highlights !

I still know little for now about electricity but I'm really fascinated by it

Have a good one