Hi
My setup has 1 low voltage mppt 150/70 and second MultiRS 6000 Dual tracker
When there is an excess solar - system disables MultiRS trackers, but I'd prefer MPPT 150/70 to be disabled first
Is there any way to change order in alghorytm?
asked
Change priority of MPPT disabling when excess solar?
Purely out of curiosity - why do you want to adjust this behaviour?
efficiency of low voltage array is slightly lower, more loss in cables via heating, while MultiRS arrays are on house facade - less heat from sun
Try setting the target Voltage(s) on the 150/70 very slightly lower than the RS. 0.1V is plenty usually, but you may be able to get away with much less. Nice to have DVCC enabled, so they both see the same V on the battery.
@Andrii Podanenko
It should work if both chargers are in the same State (ie Absorb or Float), If the RS has dropped to Float earlier then it will restrict itself. Maybe that's your issue..
I have DVCC enabled, so they both getting to Float at the same time
Also, as I responded above - even with higher by 0.2V it doesn't work - MPPT stays, MultiRS - no
@Andrii Podanenko
DVCC doesn't directly control Float status, it just helps with system-wide data. You need to check the status yourself.
In your first pic the RS is throttling at 54.43V, yet the 150/70 is not. It must be aiming for a higher target than that..
As there is no direct user control about this, maybe it's time to take a more programmatically approach.
dbus-systemcalc-py/delegates/dvcc.py is the script to "mess with".
There is a function named _distribute_current() that later calls for distribute() and _balance_chargers() functions.
Maybe you can modify to do whatever you want there....
Alex
Could you point me to the repo itself, please?
@Alex Pescaru
Use an utility like WinSCP in Windows, and log in as root to see the Cerbo's filesystem.
Then the folder you are looking is /opt/victronenergy/dbus-systemcalc-py/delegates.
Alternatively, only for studying you can look at the Victron's github repository: https://github.com/victronenergy/dbus-systemcalc-py
No, I didn't
Voltage difference doesn't work
I'm assuming before MultiRS is fully supported in VRM - this is a tough task to debug and resolve
I can try do this via NodeRED, to disable MPPT when SOC in some condition, but I'm afraid of breaking underlying logic of Victron
