Complete Kit: The kit consists of 30W solar panel, 30A 12V 24V solar charger voltage regulator controller, clips and cigarette lighter harness for battery charging,easy to fix and install.Multiple Protection: 30A solar charger controller can prevent battery overcharge, overvoltage, discharge and short circuit, reverse connection, to fully protect the battery.Wide application: suitable for various off-grid applications such as shed, cabin, door opener, etc.where 12V batteries are used, and suitable for car, RV, boat, marine, trailer, camper, pump, etc.Applicable Battery Type: The polysilicon solar panel kit with charge controller is perfect for 12V batteries, used to charge and maintain AGM, flooded, GEL and deep cycle batteries.Advanced Materials: The 12V 24V solar panel kit is made of premium polycrystalline silicon materials which have good light transmission, good waterproof and very strong ability to absorb strong light.