Hi,
When making the adapter use the ground wire for one of the connections. That way if someone gets "helpful" and plugs in the panels to 120 volts nothing will happen.
pnichols wrote:
By the way, for those who want to mount their controller for portable panels back in the RV to be close to the batteries - there's a very easy way to carry along a long and flexible, heavy gage, fairly inexpensive cable to run between the panels located aways from the RV:
Use a contractor-type 10 or 12 gage extension cord available at hardware stores. Make an adapter for it's female end so that the panels can plug in using a regular 120V plug.