I have installed a Progressive hard wired surge protector, black box at the top by the light.
Connecting the #6 wiring is not easy!
It seems to be working OK at this point.
I did not want the display constantly flashing numbers in the coach so I put it in the compartment so I could check it when we connect to shore power.
Thanks for all the information.
David Button - Ithaca NY
2011 Dynaquest XL 36' Freightliner chassis
Cummins 330 HP/1000 torque
2009 Silverado 2500HD
2008 Corvette - 2011 BMW 335xi - Honda Valkyrie