hi,
after asking a lot of persons , no one can give me a good answer so iam gone ask it here ;)
i've seen wierd thing going on with my system...
float is 55.20v , but the quattro doesnt stay on that voltage always some volts below it , 54.7v or 54.4v (in the beginning the 55.20v was good, but i dont remember the version of the firmware)
i have tested firmware 2.30 and all the beta's (now running Venus OS v2.30~51 )
i have tested with or without DVCC = same ( i need the "max. charge current" , because i have 10kw on the battery and only 95A can go to them )
i have the same problem for absorption voltage , it doesnt stay on 60v , always some volts below.
Here i have an other problem , the current does not go below 32A and stays putting 32A (or even ramps up the Current again) in the battery for the max. absorption time (6h)
i've been testing this for a long time and my battery is not broking for what the tests reveal, maybe its the way the battery works...?!?
absorption example :
All my mppts are like this ( also the values are the same for quattro ve.config)
i have 2x 150/70 and 1x 150/35
here you see the mppts try to go to the 55.20v :
My installation :
color gx - voltage of Shunt and quattro:
batteryExtra voltage meter:
above pics are for Float status
tests :
if i put value for absortion voltage to 60v (ve.config app) = quattro goes to 59.?v (does not stay at 60v)
if i put value for absortion voltage to 62v (ve.config app) = quattro goes to 61.?v
for that test iam sure my battery goes or can go to 62v
quattro values are always diff. from what the shunt tells me
install:
quattro 8000-110A and mppts are the last firmware , color is last beta
battery 48v - 840ah
shunt-ve.can
if you have some more questions i will give or will try to give you an answer , i must / will find my problem here :D
the one test i"ve not done, is reverse back to an older firmware for the quattro... (older than downloadable version)
thanks for reading this ;)
Kristof
edit : added a screenshot from colorgx, so you can see there is enought pv power.. its feeding into grid a little