Hey dstock, thanks for the input! No downer at all, the panel was *FREE*, so I'm only out $75 for the controller and wiring (which is can be repurposed). Not bad, eh?. I can always get a different panel if I see the need. It would be a 5 minute job (to install the connectors). Plus, we're not in the habit to camp in one place for many multiple days, so the solar panel will not be expected to carry the entire load. This is just a last minute throw-it-together experiment - that worked. How well remains to be seen. I just want it to help keep the battery topped off.