Generally you can choose which Solar Panels you prefer to be installed. But since we have Engineering background and work with Solar Panels for over 20 years we recommend Panels to you. These days, almost all Solar Cells are made in China and Taiwan, some are made in Japan or other countries.
The most important rule is to choose a big and established Solar company. Companies like Trina, Canadian Solar, SolarWorld, Q-Cell, LG, AUO, Samsung, etc. offer excellent quality and swiftly provide replacements if a Panel problem should occur. To be avoided are no-brand name companies (for example: Pearl Solar. We experienced low and inconsistent power output). Even the expensive and raved about Sunpower panels are to be avoided in our opinion because of a faulty design concept.
The next rule is to stay with A-Class Panels. Then full warranties apply and there will be no potential hassle later.
Generally SolarWorld has a better workmanship and a better glass quality ( higher absorption and less reflection) compared to AUO which are slightly lower in cost. Also some Q-Cell series have an excellent quality for low cost. We usually can offer a verity of good panels to match your preference. Our suppliers sometimes reduce prices on certain panels and we pass on some savings to you.
Mono vs. Poly Crystalline panels is now less an issue than 12 years ago. Both panel types are now excellent and the low/high sun radiation performance difference is now very small.
Another aspect is the power output density of the panels. 12 years ago a 65” X 40” Solar Panel had let’s say 195 W. Now you can get the same size panel with 320 W power output. But the output of a panel does not determine how good a panel is. Today you can buy a 260 W low cost panel which can have the same quality as a 320 W panel. The difference is the space each system of same output requires. If you have little space for your Solar Array you might choose a high density output panel. These panels require less space but could cost you 50% more for the same power output. So, if you have space available we recommend the lower power density panels with the same quality.