Morningstar SG-4 SunGuard 4.5 Amp PWM Charge Controller 12 Volt Vdc (voltage direct current): 12 V Solar Amps: 4.5 A Weight: .5 lbs./.22 kg Dimensions: 2.5" x 2.0" x 1.4"/63.5 x 50.8 x 35.56 mm Warranty info: 5 year warranty from manufacturer