Solar panels are graded into categories A, B, C, and D based on their quality, and the cost differences between these grades can be significant. Grade A panels, for instance, are the highest quality, while Grade D panels are typically considered low-grade materials with limited. Learn how solar panels are graded (A, B, C, D), their applications, and why quality matters. Get insights to make informed decisions for your solar project. These grades are typically assigned during or after the panel manufacturing and testing process, particularly during electroluminescence (EL) testing. The prices differ largely, and so does the quality. While the differences may seem tempting, it's necessary to understand what they are, how to differentiate them.
