1High Performance: Adopted high efficiency polysilicon Pet material, 30W power deisng, compact size,long service life, can generate more electricity in full sunlight. 2Voltage Controller: The 50A solar charger controller can prevent battery overcharge, overvoltage, discharge and short circuit, reverse connection, to fully protect battery. 3Premium Material: Made of premium polycrystalline silicon materials which has good light transmission, good sealing, and very strong ability to absorb strong light. 4Complete Kit: The kit consists of 30W solar panel, 50A 12V 24V solar charger voltage regulator controller, clips and cigarette lighter harness for battery charging. 5Application: 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.