The panels are very well built, perform well, and are very easy to install. Shipping is not good at all. Despite being well packaged, the shipping company walks on top of the panels (I saw boot prints all over the top panel of the stack delivered to me). The top panel had the backing gouged through to the silicon. However the panel still operated electrically, so the manufacturer (Renogy) didn’t feel a replacement was appropriate until the unit gave out electrically. They did not care about the time, energy, safety, and cost of detecting when the electrical failure occurred - as it was sure to do. Eventually they relented and replaced it, but Renogy’s attitude towards what quality means was brought into question for their entire company - everything they make and sell. They only care about it working when you receive the item, and even then only in the strictest possible sense of working. Beyond that they are gone and done with you and the item sold.
Good panels, well built, not all will survive shipping. Strongly recommend testing and inspecting all items immediately upon receipt.

I have a Generx generator. My generator measured a little longer and taller than the measurements of this cover, my generator Is an inch longer because of the handle and a couple inches taller. I took a chance and it fits great. I purchased it after the last hurricane, so I haven’t had the opportunity to use it while the generals is running.