Theres lots of other words that folks can use to tell someone that what they spent hard earned money for is not the best one to have purchased. Could have just pointed out that its not the cost of the controller but that its the fact that its just a PWM 3 stage controller. I know the MPPT controllers are much better and somewhere down the road I will get one. But for now helping me by giving me advice on how I can use what I have to the best of its ability would be much better than telling me that I "still have a cheap 3 stage PWM controller".