These are the "Top of the line" in charge controllers for small systems. The ProStar 15 features "intelligent" charge controlling that will significantly improve battery life and performance.Settings for sealed or flooded batteries, low voltage disconnect, temperature compensation and PWM (pulse width modulation) battery charging.Solar amps and load amps.For 12V or 24V systems, rated PV current 15 amps, rated load current 15 amps.Specifications:Model #:PS-15Battery Vdc (voltage direct current): 12/24 Solar Amps: 15 ALoad Amps: 15 AWeight: 1 lb./.45 kg.Dimensions: 6" x 4.1" x 2.1"/152.4 x 104.14 x 53.34 mmWarranty info: 5 year limited warranty from manufacturer