I have the Curt brand hitch installed, its a class 3 that I installed myself. The wiring is odd, you can buy a kit, but I work as a technician and figured it out on my own. The NV200 has 12v lights and signals, but I believe it was the brake lights that are only either 10.5 or 11.5 volts. If you use LED trailer lights, this will solve your issue with the lighting as LEDs dont require the peak voltage as incandescent bulbs do to work, they are actually brighter and duller LEDS in the lights themselves. Rather than having the voltage control the brightness of the bulbs.
ANYWAYs, back to the towing, I tow a light trailer, 400 pounds weight, with a motorcycle or tractor on it a few times a month. I buy and sell bikes so I go longer distances, and the NV tows excellent. I wouldnt go as far as to put those contraptions on the class 3 hitch like a dirtbike hauler or other heavy weight hitch carrying devices, as if you mounted a hitch on the NV yourself, you would see how it mounts, and its not thick steel mounting points, but they arent crap either. Its about a class 2 in its mounting, probably dont want to go over 200 pounds tongue weight. If you are not good with your hands, you will want to have the hitch installed by someone else, as you have to fish the mounting flanges thru the frame about a foot and its tricky to do, but its ingenious in that they (Curt) supplies you with the fish wire to do it more easily.
I towed a scoop of dirt on my trailer about a mile, and I can tell you I would not want to do that often with it, it just doesnt feel like the NV has the umphf to do it often.
I use the NV also to tow my trailer with appliances on it once in a while and equipment to move appliances, since I use it for my business, and it tows well there also.
My dealers service manager told me, it would be ok to use it to tow, as long as I stay around 1500 pounds max. So I went off what they said before I even bought a hitch for it. The only reason I asked them was I have a dealer specific LIFETIME drivetrain warranty that came with the van. I own my own business and use this van for my business, so the dealership I think uses my input for feedback about the NV200 since they sell so few I think.
I love the van, its a great vehicle, of course they did replace my tires twice under warranty, but thats the only issue I've had.
I think a good rule of thumb for towing with the NV would be, if you have to struggle to lift the tongue of the trailer, you dont want to tow it with the NV. I originally was gonna buy a nice 5 by 10 aluminum trailer, because bigger trailer and less weight, but my 5 by 8 steel trailer weighs just under 400 pounds and can handle upto 1600 pounds cargo, and I wouldnt want to tow more than that anyway with the NV, so I bought the cheaper steel trailer.