With this solar panel withy battery clip, you can charge your 12v battery directly with the solar panel.and you can charger your fan and light
SPECS
Power: 20'watts
Current max: 1.2 amps
Output voltage : 15 to 18 volts
Type : polycrystalline
Warranty: 25 years
Best charging time : between 9am and 5pm . For best results, place directly under the sun.