Grape Solar GS-PHOTOFLEX-50W Flexible Solar Panel, PhotoFlex 50 Watt Monocrystalline for RVs, Boats, Cabins &bull; Advanced technology back contact cells allow for flexibility and increased Wattage per Sq. Ft. &bull; Rigorous quality control to meet the highest international standards &bull; High transmittance, flexible lamination material is less prone to cracking than traditional glass &bull; Outstanding electrical performance under high temperature and weak light environments &bull; 2 bypass diodes minimizes performance drop due to partial shade