I have run a fair number of solar panels over the years and, with the exception of keeping batteries topped up in the off season, are a bit of a pain. I feel you are typically better off and money ahead with a small generator. On a trailer you have to consider where you park and then for best results position the panel or trailer in the right position to take advantage of the sun. Consider that running your generator (1000 watt) for 1 hour gives you as much power as a 100 watt panel being optimally oriented for 10 hours. As an addition to a generator they can be helpful, but really are not much good without a lot of extra work. You feel good about “free” power until you do the math. If you do get a system, you will be better served with a quality panel then an eBay, India sweat shop special. Like most things, quality and technology cost more.