Usage Tips:Features 1. High conversion rate: The solar panel adopts an industrial grade main control chip . The solar panel has a high conversion rate and can be quickly charged in strong sunlight. 2. Strong adaptability: The controller adopts an LCD display screen, with adjustable charging and discharging parameters. It adopts a semi flexible design and can bend the solar panel appropriately to adapt to a wider range of applications. 3. Easy to install: Built in overcurrent, short circuit protection, open circuit protection, and reverse connection protection, with 4 eyelets, easy to install, can be fixed on roofs, decks, etc. The solar panel can rotate flexibly by about 35 . 4. Stable and durable: Dual MOS anti backflow circuit, ultra-low heat generation, IP65 waterproof rating, scratch resistant, non foaming, easy to clean, equipped with advanced polyethylene coating technology, the battery surface is coated with dark blue reflective film. 5. Dual USB ports: The rear junction box has dual USB ports, which can quickly charge two USB devices at the same time. It can be used to charge cars, homes, ships, motorcycles, emergency lights, fans, etc. Parameter Maximum power (pmax): 20W Open circuit voltage (VOC): 20V Maximum power voltage (vmpp): 18v Short circuit current (isc): 1.1A Maximum power current (impp): 0.9A Output: USB 5V DC5521 18V Standard testing conditions AM=1.5 Irradiance=1000W/ Temperature=25 Specification Material: ABS Color: Black Size: 45 x 30 x 4 cm Weight: 750 g Package Include: 1x solar panels 1x solar controller (optional) 1x car charger 1x battery clamp 4x suction cups 2x Mountaineering Buckle 1x General Instructions