Posted February 18Feb 18 Hello everyone I have a 48100 lithium battery pack from Dyness and I want to connect it directly to a Raspberry Pi 4 with Node Red software without an inverter and read the data directly But I don't have any information about the addresses, message IDs, and other things related to sending data in this battery pack in RS485 or Canbus Does anyone have experience that can help me? And I want to connect 10 of these battery packs in series and connect them to a UPS. Has anyone ever done something like this?
February 18Feb 18 3 hours ago, shiva2006 said: And I want to connect 10 of these battery packs in series and connect them to a UPS. Surely you mean in parallel.
February 18Feb 18 Author No, I want to connect the batteries in series to achieve a voltage of 480 volts and 100 amps.
February 18Feb 18 I use a Teensy to read the data from my Pylontech batteries on the CAN line. You will need to make sure that the speed of the pi is fast enough to not miss packages. I'm sure you will find the protocol for your batteries with a bit of googling online. I would set the pi to just snif the data first and then you will get an idea. I find CAN much easier to use but it often doesn't contain as much detail as the RS485 or RS323 (Growatt batteries are an exception to this). Regarding putting the batteries in series. First are they designed for it? If not you will have to devise a way to balance each individual PACK or as soon as one pack reaches 100% SOC the others will stop charging. Not necessarily due to the bms but due to the battery chemistry.
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