Bests & Worsts Reviews from Amazon

This item has very poor quality control. I have 2 installed on my RV roof, and after 4 months, i noticed that my batteries werent charging fully even after an entire day of good sun. When they were brand new, I was typically getting about 250 watts between the 2 (160 x 2 = 320 watts) in the middle of may at high noon. So it could have been better, or worse. Well now after 4 months, I am lucky if I get 90 watts across the 2. This could be because, one of the panels could have completely stopped producing power. Which would make sense based on the time of the year of this review. It has developed these large white spots on the panel that look exactly like other reviewers have posted. Also, just and FYI. I have these installed with 3M VHB on the bottom and Eternabond on the top holding it down as a double safe measure, and I can say that given a few more months these would have flown off. These need gromet holes to be screwed down. However, I sure am glad that I didnt go the route of gluing and pouring self leveling sealant all over my roof, because then id never be able to get these off, which is what I am going to have to figure out how to do now (Update) - I wanted to make an update about the customer service of Renogy. I have contacted them many times over the phone, which is less than useless, as well as creating tickets online. It has been nearing a year, and still no response back from Renogy. This was something I was afraid of when ordering a product like this.