Chris, I found that my controller was bad and that the panel itself hardly put out anything.
To test the solar panel
, disconnect the wires from the panel to the controller mounted on the side of the battery
box. Attach an ammeter lead to each wire end while in full sun. That panel is about 5 watts, so you should get about 0.4 amps or so.
I replaced my panel with a 60 watt panel, which will do some serious charging. The original was only designed to prevent the battery
from going stone dead when the trailer sat for a long time.
This place has pretty good prices on solar
panels and controllers.
12 Volt Solar Panels