Usage Tips:Easy to Use The solar panel will charge automatically in the daytime. Where is the sun, there is electricity Full Safety Protections Built-in multiple protections including over-charge, over-discharge, over-voltage, over-current and more, the battery is fully protected, ensuring charging safety Wide Compatibility Suitable for charging a car, automotive, marine, RV, power sport, boat, dump trailer, gate opener, fence and deep-cycle batteries, etc Waterproof Design No worry about water or rain entering inside to damage the solar panel Lightweight and Compact Light in weight, simple installation, very convenient to carry to outdoor mountains, grasslands, etc. for power generation and charging Specification Material PET Crystalline material polycrystalline silicon Waterproof grade IP65 Maximum power 10W Working voltage 12V Open circuit voltage 13.8V Maximum current 0.8A Short circuit current 1.2A Product size 33420316mm Battery clamp extension line length 3m SLA battery voltage 12V Temperature coefficient Isc 010- 0.01 Voc temperature coefficient - 0.38 -0.01 Power Voc temperature coefficient -0.47 Temperature range -40 to 80