Very easy to install with several improvements from the last version. I like +ve and -ve labels on the panel wires and the new BT-1 transmitter is definitely more powerful and reliable, so much so that I replaced my previous one as well.
I purchased this 400 watt premium kit a month ago. I had a 200 watt 20 amp beginners set in my cargo trailer,(toy hauler build) for two years and not one problem! The items where easy install. I'm running my upright freezer and battery chargers and all is well to date. I also installed a 2000 watt Renogy inverter and it is operating as well as the solar system. The only glitch, was the remote control with my inverter not working. but Renogy said they would replace? waiting to hear from them, hope the manufacturing defective replacement side is as good as the product?
Nice kit, easy to install. If you want 400 watts of production go with the 600 watt system. You get a better controller and you get a little more than 400 watts in full sun. I’m only getting an average of 275 watts in full Florida sun in November.