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See attached pdf file for details concerning Renogy's RS-485 communications interface...should\could be helpful for anyone else that's tired of Renogy's BlueTooth external adapter inconsistent connectivity.

Anyone running Renogy's DCC50S (DC - DC charger & MPPT controller with dual DC inputs) along with Renogy's BT-2 (BlueTooth adapter fed via RS-485, rather than RS-232 AND no damn shunt needed)? This seems to be the combination that was lacking with the DCC50S (initially shipped without a battery...