I have the same error code 19 but batteries are only at 39 v. I havnot connected any solar pv so using the Utility to charge, when we lucky enough to get any power. I am using Utility first settings and "USE2" for battery settings - so no comms with the 2 x 48v Life po.
Does anyone know how to force the inverter to use the utility to charge the batteries ? It seems the battery voltage is too low so inverter is just operating in bypass mode and will not charge.