Feature: 1. Main Application: This panel can provide 50W power for you depending on the sunlight. With 2 USB 5V 2A output port for your daily use. 2. Intelligent Protection: This panel has intelligent protection for reverse polarity, overcharge, short circuit and reverse current, rest assured to use it 3. Long Life Span: Made of corrosion resistant material, this panel can be used in outdoors for more than 10 years, it can bear strong wind (2400Pa) and snow load (5400Pa), very practical 4. Easy to Install: Comes with thin size and lightweight as well, the installation and carrying of this solar panel kit can be easily completed. 5. Wide Application: This solar panel kit can meet the power needs of RVs, boats, wooden houses, trailers, farms, families, etc. Specification: Item Type: Solar Panel Kit Material: Monocrystalline Silicon Maximum Power: 50W x 2 Open Circuit Voltage (voc): 18V Maximum Power Voltage (vmpp): 15V Short Circuit Current (isc): 5A Maximum Power Current (impp): 4.6A Output: 18V Controller: Rated Current: 40A Rated Voltage 12V, 24V PV Input: maximum. 50V PV Input Power: 540W (12V), 1080W (24V) Standard Test Conditions: AM: 1.5 Irradiance: 1000W/㎡ Temperature: 25℃ Product Size: Approx. 180 x 360 x 2.8mm / 7.09 x 14.17 x 0.11in . Package List: 2 x Solar Panel1 x Controller 2 x Battery Clamp Extension Wire2 x Extension Wire6 x Connector 4 x Core 4 x Buckle 2 x Manual