Daly bms setting

[ttiburst]

My charger deliver 13.80v so 3.45v per cell.

Which value i should set for the end of charge.

Lower to cut with bms 3.40v

Or higher 3.50v to keep charging with charger.

Thx

 

[Diysolar123]

on the daly app parameter settings page for my 24v bms I have:

level 1 - cell volt high 3.5 cell volt low 3
level 2 - cell volt high 3.64 cell volt low 3

and my charger is set to 27.2V ... which is 3.4/cell or 13.6v on a 12v system
basically, I have no "end of charge"... its always floating and when charged draws no current; my charge mosfets never turn off.

 

[John Frum]

and my charger is set to 27.2V ... which is 3.4/cell or 13.6v on a 12v system
basically, I have no "end of charge"... its always floating and when charged draws no current; my charge mosfets never turn off.

Is that just when the sun shines or is that 24/7?
If its 24/7 how much do you anticipate that the float will shorten the life of your cells?
I might just do the same and not worry about cycling my cells.

 

[ttiburst]

If you do so as soon as the charge decrease a little the charger, restart immediately to charge, so if you have a lot of sunshine the batteries stay near 100%.

I wonder if it is good for batteries health?

 

[Diysolar123]

Is that just when the sun shines or is that 24/7?
If its 24/7 how much do you anticipate that the float will shorten the life of your cells?
I might just do the same and not worry about cycling my cells.

by keeping the float voltage low the charge current basically drops to zero; its 24/7.
for long life lfp batteries are normally just stored at 60-80% charge or something around there...so holding a specific lower voltage is not inherently damaging.

 

[ttiburst]

What do you mean about low voltage ?

3,4
3,45
3,5
?

 

[John Frum]

by keeping the float voltage low the charge current basically drops to zero; its 24/7.
for long life lfp batteries are normally just stored at 60-80% charge or something around there...so holding a specific lower voltage is not inherently damaging.

Yes but when the battery and the float converge its not current stress its voltage stress.
3.4 volts per is >95% full.
Even storing batteries at that level accelerates calendar aging.