Grape Solar GS-S-160-Fab8 Monocrystalline PV Panel, 160-watt Positive and Negative leads equipped with watertight MC4 connectors High efficiency solar cells w/quality silicon material for high module conversion efficiency; long term output stability and reliability Rigorous quality control to meet the highest international standards Outstanding electrical performance under high temperature and weak light environments Works for both on-grid or off-grid solar power stations