Maximum Panel Input

I am looking to adapt a higher voltage 30W panel running at 12v to drive the SunAirPlus with a step-down board with selectable V/I output.  What is the maximum current input at the rated 6V?  I see a spec for Icharge listing a minimum of 800mA / max 1200mA so is the Maximum 1200mA input, and if so will it max out with a limiting circuit vs. burning out?

I often see smaller current from the INA3221 with one or two cells connected so the 800mA minimum confused me.

Thanks