Recommended Solar control module for 50W solar panel?

All my 12v stuff is wired "directly" to the battery. My controller has no load connections.

When I am using the jacks, I simply keep the camper pigtail connected to the plug in the truck bed and start my engine. I have enough slack that I can go up or down high enough to drive the truck out from under the camper. This way the truck engine provides some amps to drive the jacks. The wiring going back to the truck bed is a combination of 10 and 8 gauge wire, so I am probably getting at least 5 amps back there.