You can get away with longer runs between the panels and the miners if you run a higher panel voltage. My existing panels  are connected 2S4P and produce around 70 volts feeding the charge controller.  My charge controller is capable of  accepting up to 250v from the panels. For a given set of panels the higher the voltage the lower the current and the lower the voltage drop. With that you can get away with a  longer run between the panels and charge controller.

It's as easy as P=I*E