Renogy 100 Watts 12 Volts Polycrystalline Solar Starter Kit w/ 100w solar panel,30A Charge Controller, 8ft 10AWG Tray Cables,Solar Adaptor Kit The kit now includes an 8ft 10AWG Tray Cable to connect your charge controller and battery The charge controller has been upgraded to Renogy' s new 30A PWM Negative-Ground Charge Controller - the Renogy Wanderer With the Renogy Wanderer 30A PWM Charge Controller, you can expand your system up to a maximum of 400W Ideal output: 500Wh per day; can fully charge a 50Ah battery from 50% in 3 hours (depending on the availability of sunlight) Negative grounding controller with battery reversed, overloading, short-circuit and over charging /discharging protection ensures the broader off grid applications and safety. Especially can be used on a vehicle which has battery negative on the chassis