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data

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  1. Update to my own issue above: For now, I have reduced the max. voltage of the second inverter to 51.2V. In case the above issue should still occur I'll go even lower to 50.9V
  2. Anybody using more than one inverter with one common bank of pylon batteries? I have two inverters (5048MGX and 5048GK) connected to the same battery bank. The first pylontech module RS485 port is connected to the 5048GK BMS port. At the moment only the GK is used currently providing mains power to the house. The MGX is turned off. When there is enough sunlight, the MGX turns itself on and charges the battery together with the GK. Since there is no BMS connection between the Pylontech the MGX is set to user defined battery and charging/float voltage set to 53.2V Today afternoon batteries where charged to 100% SoC and after a while I had the warning 69 on the GK - apparently the batteries wanted to do some balancing and were not happy with the other inverter providing a steady 53.2V. After I disconnected the MGX, charging voltage dropped slowly to 51.x volts and increased back to 53.2V after a while. I already tried to connect the MGX to the RS485 port on the second pylontech but it seems that only the first one is active. My question is: How can I use two inverters on one bank and have the pylontech bms communicate to both? So in case the batteries want less voltage to do their balancing both inverters get to know this and behave accordingly.
  3. First off, sorry in case this already has been mentioned or asked before: After adding a couple more pylontech us2000 batteries to my existing stack which is connected to one 5048GK I see a strange behaviour: The SoC as reported by the Inverter differs from time to time and is up to 30% less as I being communicated on the CAN bus of the pylontech batteries. I already changed the order of how the plyons are attached to see if it has anything to do with which battery being the master controller but it is still the same. The past months (before I added some more pylontechs) I only noticed the SoC as reported by the inverter to 1% over the value reported by the battiers on the CAN bus, leading to the Pip reporting 101% SoC when fully charged. Has anybody else noticed something similar?
  4. Dear Jacques, would you mind sharing your source? I am working on a somewhat similar project but switched to the ESP32. Instead of RS232 I am using the CAN-bus to interface with the Pylontech (the CAN bus protocol code I wrote also works for BYD and LG RESU batteries) and interface with MQTT which is connected to iobroker. Are you using the async-webserver library? Kind Regards, dk PS: I also sent you a PM
  5. @andrewj When did you buy your GK? And what version is your control panel / U2?
  6. Which firmware version do you have? I've had the same issues with the fans and solved it by upgrading with attached files. The most recent Version I have is main-CPU 41.07 and bluetooth 00000.21 Attached you'll find the firmware archive along with the necessary installer for windows. I did the MCU upgrade first, after that the control panel. Use a good serial to usb converter. Some cheap ones do not work! When upgrading, keep in mind that the converter shuts off the power towards the end of the upload. So always use a notbook with charged batteries, otherwise your upgrade will fail and you'll have to debrick the unit... @coulomb pointed me to some posts where you can see a more recent version (41.14 and 0.24), so if anyone here has a more recent version, please upload it or send it to me. GK fan spin program.zip
  7. What is the latest firmware for the 5048GK aka the Axpert VM III?
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