Hello Everyone,

This is my first post on this great forum and I consider my self a newbie to renewable energy. I've learned a great deal from here and through the help of this forum I've installed my first 5KVA off grid system, so thanks for all the discussions and posts.

We know that Mono panels are more efficient than poly panels and they also produce more power during morning and evening time. I'm personally using 40kwp of poly panels and so far I'm very satisfied with them. In my area during day ambient temperature ranges from 15 C (winter) to 34 C (summer). Either of the panel technology would work for me but my cousin lives in an area where during summer temperature can go as high as 52 C. 

To my understanding mono crystalline cells have slightly higher efficiency and as the temperature goes up to a certain point, power production of these cells are less effected than poly crystalline, but Polly crystalline cells have better temperature co-efficiency than Mono, therefor power reduction will be less effected than mono cells as heat increases. If i'm understanding this correct as the temperature increases from 20 C to 28 C mono will perform better but when it reaches 35+ C heat will be effecting mono cells more than Polly cells!!!!! I'm slightly confused to do the math and understand at what temperature which type of solar panels are better.  Please do correct me if I'm getting this entire thing wrong.

In short my Question is in certain areas where in summer temperature reaches to 52 C, which type of solar panels is better and which brands you guy's suggest.

 

I would appreciate some of the more experienced members chiming in here. While we wait for them, allow me to contribute my 2 cents:

 I also thought that monos were still better at higher temps, but after having looked at the specifications of modern polys, such as the Canadian Solar CS3U PolyGEN4 modules, I'm also starting to think that polys have closed the gap and perhaps even overtaken many of the monos.

I think the general message is to interpret each product's specifications and make your decision based on those performance characteristics, not only on whether they're polys or monos.

If you can get a poly panel with the desirable energy density and an energy coefficient better than the monos you have on your list, go for the polys, and vice versa.