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I have a Epever 40 amp charge controller and using python + minimalmodbus to communicate to it on the rs485 bus. I can read all of the over 100 registers OK. I can set the 'battery type' to 'user'. I'm trying a test to set the boost reconnect voltage. This is what I'm doing but, I'm getting an...

I'm logging data from the controller's rs485 interface to see how it works. It seems to be doing the right stuff but there is one thing that doesn't make sense. According to the documentation this is the definition of the status bits: D15-D14: Input volt status. 00 normal, 01 no power...