Bests & Worsts Reviews from Amazon

When designing the solar system for my RV, I wanted to get a system that would give me the best value for the dollar. So I elected to install 5 100 watt panels and use the Renogy 40a MPPT controller. Before ordering the components I called Renogy Customer Service and asked one of their technicians if this controller would support 5 panels. This person said that it would. So I put the system together and it wouldn't work. I called Renogy and told them and we were able to determine that the charging voltage was too high (Over 100 volts. The charge controller required that the voltage cannot exceed 100 volts. They never said anything about there being a "maximum allowed charge voltage" or anything like that for this unit in any of their descriptions or documentation or when I talked to them. I even ran this by one of their technicians just to be sure. What more could I do? Oh well, I will just return the 40 amp unit and get a unit that will work with my system: or so I thought. So I went to Renogy and I asked for an exchange or refund. They flatly refused and referred me to Amazon. Amazon referred me back to Renogy saying that they were a 3rd party seller and I would have to deal with them. The Amazon representative connected us up to Renogy, and they hung up on us. Obviously they are not going to issue me a refund or allow me to trade up. WHAT A BURN !!! I said BEWARE of 3rd Party SELLERS on AMAZON because if there is a problem, you might run the risk of getting into the endless loop of AMAZON referring you to the seller, and the seller refusing to work with you, and then sending you back to AMAZON. I feel robbed and cheated!!! Anyone need a 40 amp charge controller??? Renogy products were good quality, but be prepared for them to not stand behind their products. If you look at other product reviews for them you will find I am not the first. Beware of Renogy's technical ability: They were the ones who said that this charge controller would work for me: I didn't know so I asked them, yet they want me to lose all that money when they were at fault. Renogy has some great products, but I do not want to continue doing business with them. Renogy's offer to settle was no refund, and that they would give me a 15% reduction on the charge controller I needed. The trouble was that their price was $405 which was far more than the $181 price of comparable units on AMAZON.