Open Circuit Voltage (Voc) : 49. STC: Irradiance 1000W/m2, cell temperature 25°C, AM 1. Bifacial Technology Advantage: The JAM72D30-550/MB bifacial model can generate 10-25% additional energy compared to traditional panels by capturing light from both sides, making it ideal for ground-mount installations with reflective surfaces. Exceptional Efficiency-to-Price Ratio: At 21. 3%. Under standard test conditions, JAM72-D30 outputs 550 W of power. A low temperature coefficient provides more energy output at high working temperatures. Experience higher efficiency, reduced shading, lower resistive. The JA Solar 550W Monocrystalline Solar Panel is a high-performance solar module engineered for residential, commercial, and industrial applications. With cutting-edge PERC (Passivated Emitter and Rear Cell) technology, this panel maximizes energy absorption, ensuring a higher power output and. This manual contains important safety instructions for the Solar Photovoltaic Modules (hereafter referred to as “Modules”) of JA Solar Holdings Co. (hereafter referred to as “JA Solar). This powerful panel is designed to harness the sun's energy and provide a reliable and sustainable source of power.