Mine has lived on the back of my solar powered camper trailer for a year and is very road-worthy. I ran 1" flexible plastic conduit into it and installed three 12A breakers for my three 125watt panels. Easy to work with. Sturdy. Steel combiner bar goes in the top of all the breakers for your main positive line-out to attach to. Negative bus bar nicely located out of the way in the lower left corner. Well laid out.