question

Hi,

If the batteries get to 14.4 (depending on type) then they are at around 80% charge then at the end of a absorption phase held at 14.4 they are full .

Now the reg does not care if another charger is also used it just sences the battery voltage and will switch to absorption then to float and then it will just supply all the loads (if it can that is) and hold the float voltage.

You really should not keep putting the batteries back into bulk all the time when they are full.

If you really want to reset the reg then put a switch in the PV and Battery lines and turn them both off, then wait say 2 min then turn them back on

When turning OFF ITS ALWAYS BEST TO turn the solar off first then the battery

When turning ON ITS ALWAYS BEST TO turn the battery on first then the Solar

Also another possible way is if you have a smart solar reg or a victron bnluetooth dongle attached you can go to settings and turn the charger OFF then back on this may work.

I have not done this myself so cant confirm that.

I would also HIGHLY recommend that if you don't have the bluetooth option, then buy the add on and get it as you also get 30 days of battery charge history ie max charge voltage and MIN battery voltage, very handy for reference plus many other setting options, Its a must have in my opinion.

in regards to getting the info from the BMV, well this is not so wise ie I presume you are referring to SOC here, well that maybe fine when the batteries are NEW and the real battery capacity is there and available,

However these battery's quickly fall off in capacity and thus the SOC is a not a really the correct capacity say after a year.

Voltage is the way to only measure a sealed battery, (or a special capacity test meter)

a good way to describe this is

lets say you have a 200 amp hour bank and yes we can use 50% so we have 100 A/H usable

now in Theory we can do this 1000 times and they are finished. well .

lets convert to a 200 liter water tank for (example purposes only)

and every time you go down to 50% you then add 500ml of sand (simulated aging of the battery) so as you can see the bottom half of the tank slowly becomes sand and you no longer have your original capacity of 200 ltr, but you are still pulling 100 liters out SO you dont now know you are pulling 100% every time. (See the point)

Its no longer a 200 amp hr battery its a 100 amp hr battery and you are pulling 100%

this is why the batteries fall of a cliff as they get old as people forget to adjust for the real avalable size based on AGING and start to cycle very deeply.

Its also why people who only use 20% of there bank get extra time (yes there number of 20% cycles goes up) but they are not also going below the 50% level even after 2 or 3 years

other factors are involved also (especially heat and charging to quickly ie to many amps) but lets leave this for another time.