Output current (max): 0.17A / 0.34A. Output voltage: 17.6V (21.8V no-load charge) / 8.8V (10.9V no-load charge). Dimensions: 251x140x17mm. Weight: 0.5kg. Power: 3W. Tolerance: 3 %. Operating temperature: -40...+85°C. Sealing: weather protected. Function: for leisure, powering small lamps, warning signals, weather stations. Material: polycrystalline silicon, multicrystalline silicon solar cell. Lifespan: 15 years 90%, 20 years 80%. Note: Photovoltaics & Solar Cells. Spec info: number of cells and connections 36 (2x18), 18(2x9)