Solar CS6W-535 Bifacial Mono Perc Solar Panel Looking for a solar panel that combines efficiency and cost-effectiveness? Look no further than the BiHiKu6 535W solar panel bifacial. With power of up to 550W and module efficiency of up to 21.4%, this solar panel stands out as one of the most powerful options available. Its advanced LID/LeTID mitigation technology ensures minimal degradation by reducing degradation up to 50% and minimizing micro-crack impacts.