So far the best combination I've found for a Chargery relay setup is these two gismos. Everything you need to run one contactor for common port (by wiring the relay controller NO contacts in series to one relay) or two contactors. Plus you get an extra controller for cooling fans or whatever. Lowest operating current and the coolest running of everything I have tested. Probably my final setup.
The parts:
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I bought two of the contactors and they looked new. I run the relay module because in some cases current energizing two contactors causes the Chargery to reboot.
The hold current for the entire setup is 157 mA. Runs cool (barely warm) tested to 100 amps.
Since the module does the switching logic for both Chargery relay outputs common charge/discharge setups can use just one contactor for both charge/discharge and temperature protection cases.
I wired the Chargery relay wires to the high triggers and common and brought 12 v in from my stepdown to power the controller and the contactor coil.
Diagram for common port single relay
View attachment 13830
For two contactors run 12v+ through NO1/COM1 and NO2/COM2 separately to each coil+.