charge current jumping?

[kr0815]

Maybe an issue, maybe my fault:

Charging 2 batteries - (SOC at the moment over 90%) - current ist jumping around
If i understand all settings - they should load with max current

I don´t see any wrong limotations, cell voltages are way under criticial points

I expect the charger to fully load with it´s maximum of 70A - it´s jumping between about 30 to 45A

One of my Daly BMS is not very accurate regarding Amps, but in my understanding, dbus-aggregate-batteries only uses the internal shunt?

[Dr-Gigavolt]

Please check if both instances of dbus-serial-battery send /System/NrOfModulesBlockingCharge equal to zero. If not, it is the issue Louisvdw/dbus-serialbattery#458 and workaround is to set the parameters for dbus-serial-battery more liberal than for dbus-aggregate-batteries, even if OWN_CHARGE_PARAMETERS = True. Otherwise review the settings.py and the logfile.

[Dr-Gigavolt]

dbus-aggregate-batteries sums currents of all Victron chargers/inverters and adds or subtracts max. one Smart shunt measuring DC consumption.

[kr0815]

NrOfModulesBlockingCharge was always zero

I thought dbus-aggregate-batteries is using the victron-internal shunt to meassure current, calculating culoumb instead of using the BMS Values? wouldn´t that way make more sense?

[Dr-Gigavolt]

I was confused by the expression "shunt". There is no shunt in the MPPT, it is a Hall sensor. In Multi/Quattro ... I don't know. But you understood correctly, it uses the internal current sensors of all registered Victron devices.

[kr0815]

Now i´m confused :-)

The marked sensor - this is where your software calculates the SOC from or from the 2 BMS?

You have much more experience than me

Does it make sense to add a smartshunt?
Is the internal shunt / hall-sensor, whatever inaccurate?

[Dr-Gigavolt]

AggregateBatteries on Virtual is correct. The marked sensor is the one read by my program. And according my experience it is accurate. MPPT's sensor as well.

If you set up settings.py correctly, all internal current sensors are found by my program.

[kr0815]

Which current sensor is taken in the end to calculate SOC?
Only the Shunt- whahtever.. in the MP2?

I think there should only be one meassurement device in the whole setup, otherwise it will never work correctly?

My system is set to german language - is it right to have this "load current limit" to off? this value is handled by your software?

[Dr-Gigavolt]

I sent you my phone number per eMail, you can call me. I speak German too.

[transistorgit]

is this fixed?
we worked a lot on the daly driver in the last weeks. please try the latest version.

concerning jumping currents, I read that daly had a firmware fix, so maybe this is a daly internal problem?

[kr0815]

where could i get this firmware update?

where to get updates for the daly driver?

[transistorgit]

for the driver, just install the current https://github.com/Louisvdw/dbus-serialbattery

for firmware: don't know, there are some files in newsgroups floating around like here. but never tried it myself
https://www.microcharge.de/forum/forum/index.php?thread/1102-sammelthread-daly-bms-firmware-tools/

[kr0815]

was not that easy, but i managed it :-)
To install the actual version, i had to choose the nightly build