I have had two Fivestar 400A lithium running in Parralell for about 6 months Using an Ecco 11kw inverter. I have tried comms with the inverter, but definitively far beter by setting without comms and parrallel with network connections as per Data. The units have all the bells and whistles, except uses 6 led's for SOC. The LED's are actually pretty accurate. The Ecco Algorythms sucks. So only use that for gathering data. I am still messing with settings but so far have streamlined and tweaked between 15 and 17kw out of each. Float Voltage 57V and low cut off to 47V. If cutoff is lower they enable undervoltage trip and need to be reset. I am monitoring use on an hourly basis as i intend upgrading to the beter systems in 3 years time. For the money, Aɓsolutely worth it.