Renogy 550 Watt Solar PanelRenogy 550 Watt Solar Panel Overview The Renogy 550 Watt Solar Panel is a high performance bifacial solar module designed to maximize energy production in various conditions. With a peak power output of 550W and an impressive module efficiency of 21. 3%, this panel captures sunlight from both sides, yielding up to 30% more energy compared to traditional solar panels. Key electrical specifications include an open circuit voltage of 49. 95V, a short