The main feature of this product is charging 12V lead-acid batteries. Equipment including a 12V lithium battery can also be bent to 30 degrees for installation and powering RV cabins, tents or any other irregular surface. The power supply is energy efficient and environmentally friendly. Perfectly ideal for outdoor work, travel or camping. Specification: Maximum power: 80W ± 0.25W Working voltage: 18V±0.3V Working current: 6.66At0.15A Short circuit current: 4.44A ± 0.15A Open circuit voltage: 21V ± 0.8V Temperature coefficient voltage: (O.06510±0.15)%/°C Current temperature coefficient: -(160±10) mA / °C Power temperature coefficient: -(0.50.05)%/°C Maximum system voltage: 20V ambient temperature: -40 / °C - + 85 / °C (40 °F to 185 °F) Air resistance: 50pst (2400 Pascals) Snow protection: 113psi (5400 Pascals) Hail impact: 25 mm (1 inch), 23 m / s (52 mph) Net weight: 1800 g Gross weight: 2000 g Product size: 80 * 54 * 0.25cm / 31.49 * 21.25 * 0.09in Package List: 1 * 80W Single Crystal Solar Panel Tips: 1. Before use, please make sure that the positive and negative terminals of this product are connected to the positive and negative terminals of the charging product. 2. Unless you are a professional technician, do not attempt to modify the PCB circuit, otherwise we are not responsible for such results. 3. Best working time: 9:00-17:00 (mainly used for sunny weather) 4. Quality Assurance: 3 years of material and process assurance; ensure that the output power is 80% within 5 years, and the output power is 50% within 10 years. The power loss of the component was 3% during installation.