Would like to add one of these http://www.amazon.com/OPOLAR-Powered-Battery-Enhanced-Personal/dp/B06WGLGJ94/ref=sr_1_8?keywords=usb+fan&qid=1565978580&s=gateway&sr=8-8

I've built up two battery packs like these to power them http://www.amazon.com/Portable-Omars-10000mAh-External-Compatible/dp/B07H9Z5369/ref=sr_1_10?crid=3RY59N1I2Y30N&keywords=18650+power+bank&qid=1565978777&s=gateway&sprefix=18650+power%2Caps%2C335&sr=8-10

With this I can place them anywhere I wish! Including out in the Dome tent. 

But also consider that you can get through a day or two on just the dual batteries so if your boondocking periods are short you don't need that much solar for recharging. So for someone just starting on solar a 100-150 watt portable kit is a good way to go, its simple to install and use.  They can always add a roof mount or a second portable kit later. 

True enough for our purposes. There are direct solar powered fans and water pumps but they aren't really practical for camping. And at the risk of stating the obvious you aren't going to be able to run anything at night directly from a solar module.  Even the large grid tied solar systems don't work without somewhere to store the energy, in that case the utility company in effect stores it on their grid for you.

So when I said that a 100 watt solar module will run typical light duty loads in your trailer if you're careful, that means that it will maintain the charge of your battery during a multi day boondocking trip. I would still advise having a backup fuel based battery charging source available for cloudy weather, that might just be tow vehicle charging if its usually sunny where you camp. 

Maybe I'm being too nerdy, and this  may not be perfectly true, but you can't run anything with solar.  Solar is to keep your battery charged.  Everything that runs on 12v will continue to work from the battery and will work longer because of the solar, but without a battery in the equation you won't be able to do much at all.

TT

There are lots of choices in portable solar modules. If you get around a 100 watt kit (pretty common) you can run most most 12V things in the trailer as long as you're frugal in your energy use, the weather is sunny and the solar module isn't shaded at all. Get a long cable so you can place the solar module in a sunny location. You won't be able to run either the fan or the heater for long periods, and of course your ac appliances won't run. The slide is fine, it only runs for a few seconds so doesn't use much energy. 

We are brand new owners of a 2014 179.  We have a sticker near the door that says Zamp Solar ready and a plug in on the bottom back side near the door.   Does this directly connect to battery for charging using a portable solar panel?  Does this work without a control panel installed in the camper?  What can run on the solar panel if this is plugged in (slide out) ?  Any help with this would be appreciated as there is little direction in the owners manual we received.  Thanks Ken and Leeanne.