Renogy 30 Watts 12 Volts Monocrystalline Solar Panel High Efficiency Module RV Marine Boat Off Grid [Product Efficiency] High module conversion efficiency. Ideal output: 120Wh 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] With dimensions of 13.4 x 23.6 x 1.0 inches, you can carry this 30W 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. [Warranty Information] 25 years transferable output Warranty and 5 years material and workmanship Warranty.