Renogy 200 Watt 12 Volt Polycrystalline Solar Starter Kit with Wanderer 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. The charge controller has been upgraded to Renogy 30A PWM negative-ground charge controller. With the Renogy Wanderer 30A PWM Charge Controller, you can expand your system up to a maximum of 400W. Ideal output: 1000Wh per day; can fully charge a 50Ah battery from 50% in 1.5 hours (depending on the availability of sunlight). The kit now includes an 8ft 10AWG Tray Cable to connect your charge controller and battery.