I intend to use my MP2 as pure inverter with remotely controlled setpoint.
By now I don’t care anymore if setpoint control via Modbus TCP or MQTT or if necessary even dbus (most dbus paths are avaiable with MQTT anyway).
How to accomplish, what needs to be configured?
I disabled the charger function in VEConfigure. But when I load an ESS Assistant to make certain ‘objects’ available, the bloody thing starts to charge the battery from grid nevertheless and switches off my solar chargers at bright sunshine…
I tried /vebus/296/Hub4/L1/AcPowerSetpoint and yesterday it worked, today it does not work to control the output power.
Sometimes I can read Modbus register 37, sometimes I can’t. When trying to write it I always get “GatewayPathUnavailable” or in the console
(unit id 234 is 296 with MQTT)
To protect the battery the MultiPlus will always use grid power.
What battery do you have?
How is the ESS assistant configured?
Can you make a screenshot when the Multi is charging? Maybe there is an error code that explains why it is charging.
Why do you want to write 100 (one hundred) registers from 37 to 136 ?
Something is malformed in your request…
LE:
Sorry, now I’ve seen you are using data type set to “Single Holding Register (R03/W06)”, and then the quantity translates to value.
Try to use “Holding register (R03/W16)” and see if it’s the same.
>> To protect the battery the MultiPlus will always use grid power.
ok, I set this to 45V in the Assistant. When the MP2 started to charge from Grid and the ESS switched off the PV, the accu had 52V…
>> How is the ESS assistant configured?
more or less standard (default values) except the above and the ‘battery protect’ not to take action above 50V.
>> Can you make a screenshot when the Multi is charging? Maybe there is an error code that explains why it is charging.
What screenshot? in the console you see the MP2 “Charging” and ‘pearls’ sliding from MP2 to battery/DC.
Where to see this kind of notifications (error code)?
Why does it disable the PV chargers at bright sun while charging from grid at the same time??
Please add screenshots from the settings.
Can you also confirm that the ESS assistant is correctly installed? Go to the remote console → settings → ESS
control is done by mainly 4 Py scripts on 2 Raspis plus one Raspi for Venus (‘small edition’). MQTT broker on Venus used. Home Assistant, influxDB, grafana-server on the ‘main’ Raspi.
Priorized (1) accu charging (80% SoC controlled during summer) / (2) dom. hot water loading (3 stages, battery voltage level) / (3) surplus feedin / zero feedin in case of no surplus.
Grid power info gained from eBZ smart meter. Lumentree setpoint control via RS232 (very simple, took 10 minutes to get it running and a 5€ RS232 adapter; no 50€ VE.BusToMk3toUSB, no days of not getting power from the inverter…).
Serial communication with Lumentree, grid meter and Viessmann device. 1-wire for additional temperatures info.
different reaction on small/huge increase/decrease of load or on pulsing loads.
the system is running fine, except that I need more power for coffee machine or washing machine etc. (the system is officially a ‘Balkonkraftwerk’, this is the reason for the Lumentree)
