Sunpower A grade Solar Cell doesn’t mean Top Grade, L Grade is the Top grade

SunPower Solar Cells are quickly gaining popularity, and as more people are looking into it for potential buying opportunities, they might be surprised by the way SunPower grades its cells. The solar cell grades range from Grade A to L. However, be wary as Grade A is not the highest grade, it is, in fact, the lowest grade. The highest grade …

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