Stable performance: high conversion efficiency, good output efficiency, low luminous efficiency and strong applicability.High stability and good durability. Scope of application: the battery charger kit is suitable for car batteries, cars, RVs, ships, aircraft, satellites, space stations, outdoor agriculture, plantations, travel,solar street lights, etc. Lightweight and Portable: This 300W 18V solar charging panel kit is lightweight and easy to carry when traveling outdoors. Environmental protection: This product can be used directly with DC fan products and can also be used directly with water pump products.Solar charging, environmental protection and practical. Ease of use: Placing the solar panel facing the corresponding interface on the wiring allows you to connect products requiring electricity (such as fans, lamps, etc.). High cell efficiency with quality silicon materials for long-term output stability and reliability.Strict quality control ensures stability and reliability, 23 total testing procedure to carry out quality control High transmittance low iron tempered glass with enhanced rigidity and impact resistance Usein play Type: 300 W solar panel Tolerance: +/- 5% SLA Battery voltage: 18 V Solar cell type: Monocrystalline Open circuit voltage (Voc): 18 V Maximum system voltage: 18 VCoefficientTempered Isc?: (010+/- 0.01) %/C Tempered Coefficient of Voc?: - ( 0.38 +/- 0.01) %/C Tempered Power Coefficient Voc?: - 0.47?%/CTemperature range: -40 Celsius to +80 CelsiusColor: blackMaterial: Monocrystalline siliconSize: 280?x?380?x? 2.5?mmPackage contents: 2 x 300W solar panel, 1 x 60A solar controller, 2 sets x connector cover, 1 x English manual.Only the above package content, othersProducts are not included.The allowable measurement error is +/- 1-3 cm.