Serenelife 200W Foldable Monocrystalline Solar Panel Kit with 20A PWM Controller - Portable Solar Charger for Camping, RV, Boating & Emergency Power Supply

I liked that most of the screws and other hardware were tight, with just a couple exceptions. Check the hinge screws, and the nut on the inside is an 8mm. I liked that once I got it connected to my 25ft SAE cable and plugged into my trailer, it worked right away. The hinged supports are all metal, and much more rugged construction than a competitors, which has plastic pieces that caused me to return it when they broke. A couple things I didn't like. The velcro pad on the plate inside the panels came right off with the controller, and I was particularly careful because I had read other reviews where this happened too. I removed the remaining rubbery residue from the plate, and I glued the velcro pad back on the plate with some CA glue & accelerator. The other thing I didn't like is the controller (seems pretty cheaply made) didn't come with a pigtail that has an SAE plug on one end and bare wires on the other, which would make it compatible with many RV's and trailers that have SAE sockets mounted to their sides. My controller and panel edges had some wear marks. Not sure if this was a return maybe.11/22/23 update. Very happy with this panel after my recent trip into the Idaho mountains for 10 days. Weather consisted of some sunny and some cloudy days, and one day it snowed. I have dual batteries on my TT, and I run a CPAP all night. In the past I've had to run my generator every two days to charge the batteries, but on this trip I never had to fire up my generator! Additionally, I left the panels and controller plugged into my trailer even through the night to see if the controller would use much power. I doubted it would, and it didn't. So, no plugging and unplugging the system at morning and night. I've changed my rating to 5 stars because the system just flat worked very well.