I have not looked at the specs for the SCC you mention. However many have a PV input amperage maximum. Since your Voc is 120v I would guess that the controller is MPPT style which basically is going to act as PWM if you go all parallel.Actually I don’t thing I’m not misunderstanding at all. The Nominal wattage from the panels will be 740 W. Minus the resistance of the cabling from the panels to the controller that will deliver approximately 35 A of current at +/-21 V to the charge controller. Charge controller will convert that (~35A @ 21V+\-) into the appropriate trickle charge the batteries depending on their state of charge and temperature. As long as I don’t exceed 120 total panel voltage supply going into the charge controller The charge controller can handle the rest.
ETA: Pardon me if my replies came off poorly. I was not trying to impugn your thinking about this. It can be easy to miss a specification when looking at components to assemble into a PV system. Every time a conversion is done from one voltage to another the input specs of a device and the output specs for Voltage and amperage change. 10a at 120v is the same power as 100a at 12v. But the amperage of the 12v unit makes for different sizing criteria for components.
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