I recently purchased a 2016 Rockwood Roo #183. On my first outing, which was 4 days dry camping, the CO alarm kept going off. I had the battery that came with the trailer tested and it was determined to be fine. The dealership suggested I add a second 12 V battery and bridge them together. I did just that and on my next 5 day dry camping trip, all went well. Now I plan to go dry camping for 10 days and feel the need to buy and hook up a Zamp solar panel to keep just the two batteries "topped up" during my trip. All our cooking is down outside on a stand alone gas grill or BBQ, the fridge runs on propane, I just need use the internal lights, and maybe the bathroom fan when I'm in the shower, and maybe the radio. Based on the Zamp Solar website, I am leaning towards the ZS-120-P unit. Any feedback would be greatly appreciated.
We have been camping for over 2 months now and only had electric for 8 days. Mind you the truck charges the batteries each time we move. We use the Zamp 120 and it works perfectly. Our camping has been mostly in Utah, Arizona and Colorado so we have had plenty of sun. You should be fine.
I have a Roo 17. We have used it 5 times all of which has been dry camping. My goal is to be able to dry camp at least a week. I first started out with a 100 watt Renogy solar panel and their PWM charge controller. Towards the end of the week the battery was getting discharged and the CO/propane detector started to chirp. I then bought a second 100 watt Renogy panel and wired in parallel. They sell connectors to do this. I also bought a Blue Sky MPPT charge controller. on our next two dry camping trips we were able to go all week and the single 12v battery never got below 2/3 full all week, even with a couples of days of partly cloudy skys. I have about $500 in this system. I believe that a 120 watt Z-amp system would cost around $600 or so. The largest draw on the battery is going to be the water pump. I have attached some pictures and a word doc. listing the load demand from all the devices in my Roo 17
Of course, there are many good manufacturers and products to fit any need. The key is to find the need and match it with a good system. They also has many other choices. I went with their 150w panels and a 30A trimetric charger/controller, but size matters in regard to what will fit properly on a roof. I have a lot of roof, so a suitcase was not considered.