The 18V 20W Fixed Solar Panel (6520D) delivers reliable power with a maximum output of 20 watts and an open-circuit voltage of 22.8 V. Featuring monocrystalline silicon cells and 3mm tempered glass, it ensures high efficiency and durability. Its heavy-duty metal frame and fully weatherproof design make it suitable for harsh environments. The panel operates efficiently across a temperature range of -40° to +90°C and supports system voltages up to 1000 V. Shade tolerance and an included junction box enhance performance and installation ease. Backed by a 25-year limited warranty for long-term confidence. Features: Max power 20 W Open voltage (VOC) 22.8 V Short current (ISC) 1.3 A Mpp voltage (Vmpp) 18.7 V Mpp current (Impp) 1.07 A Temp Range 40° – +90° Maximum system voltage 1000 V Dimensions 420 mm x 355 mm x 17 mm Technical Specifications: Shade tolerant Heavy duty metal frames Monocrystalline silicon cells 3mm tempered glass Fully weatherproof Junction box included 25 Years limited warranty