Renogy 10 Watts 12 Volts Monocrystalline Solar Panel [Product Efficiency] High module conversion efficiency. Ideal output: 40Wh per day (depending on the availability of sunlight). Bypass diode minimizes power drop caused by shade and ensures excellent performance in low-light environments. [Portable] High efficiency Mono-crystalline Solar cells with dimensions of 16.9 x 7.3 x 1.0 inches, you can carry this 10W solar panels with you easily. [Easy Installation] Pre-drilled holes on the back of the panel for fast mounting and securing. [Reliability] EL tested solar modules; no hot-spot heating guaranteed. High quality glasses have capability of withstanding heavy snow and strong wind loads.Outstanding electrical performance under high temperature and low irradiance conditions. [Warranty Information] 25 years transferable output Warranty and 5 years material and workmanship Warranty.