I have a high charge voltage of 59.20 Volt in my Smartsolar MPPT charger, and no idea where it comes from
This is the BMS setting. CVL is 55.2 V, i have DVCC disabled
This is the Multiplus setting and is also 55.2V
Where does this 59.20 Volt come from ?
How many solar chargers do you have?
Or maybe a layout of your system with all components will help for understanding.
Did you verify the reading with a digital meter?
Is feedback enabled?
Thanks for the layout.
That value on Charge voltage is mirroring the “/Link/ChargeVoltage” dbus path.
And that value is set on dvcc.py script, based on the values received from BMS.
To that value is ADDED the solar voltage offset.
Which value do you have on com.victronenergy.system/Debug/BatteryOperationalLimits/SolarVoltageOffset ?
system/0/Debug/BatteryOperationalLimits/SolarVoltageOffset = {“value”:0}
Which value /Hub/ChargeVoltage ?
Who is the Master in your parallel working system?
I see you know your way around Venus OS and dbus.
Take a look at dvcc.py script and see how this “/Link/ChargeVoltage” is set.
Alex,
Actually i am looking on the mqtt interface.
Here i find the following
/solarcharger/274/Link/ChargeVoltage: {“value”:59.20000076293945}
/vebus/275/Hub/ChargeVoltage: {“value”:59.20000076293945}
/battery/512/Info/MaxChargeVoltage: {“value”:55.20000076293945}
i do not know who is in charge of charing
Maybe you can help me setting up the multiplus charger as master and the Smartsolar mppt to follow. That would be my ideal setup.
This is the culprit, set in _legacy_update_solarchargers() function.
Try to enable DVCC and then the flow will avoid the above and take the info from the BMS.
I don’t have a Multiplus for guiding you to this, I have a Multi RS Solar.
What I was telling you were just educated deductions, studying the internals of Venus OS and its drivers.
I have DVCC enabled and the /vebus/275/Hub/ChargeVoltage has dropped to 55,2V.
In the process i also seen a voltage of 57.9 ?? no idea where that voltage’s came from.
But i rather not use the BMS charge algorithm as it re-bulks everyday regardless of the battery use. I’d rather use the Victron method as to re-bulk at float - 0.8V.
But BMS knows better what it’'s good for the battery… Why not use it?
There is no point to charge to 100% everyday. Before i only had the multiplus and in summer it would recharge the battery to 100% every 2 or 3 days (or 1 if i use a lot of energy) . To keep wear low on the batteries i would like to keep that schedule.
It is not a very big deal but i don’t get it where these strange voltage’s come from.
And why can’t the Multiplus not be the master and the MPPT follows. The BMS would only guard against mishaps.
Anyway Alex thank you for you assistance i see you have been occupied with this issue before.
This happens automatically with the ess assistant when there is no bms control.
The system will follow the ve bus voltages.
But be aware that the voltage set point changes if feedback is enabled.
VRM advanced has custome widgets you can load all the information from.
That voltage is only a problem if your battery is also being overcharged. Verify with a meter not just software
I hope/believe the BMS will protect my battery against over/under voltage at al times no matter what funky voltages Victron cookes up. As everything hooked up to home assistant i can always check history what happened
I ma going to repeat this, because a program knky spits out what it is fed. If it is a lie… 
how do you verify?
