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12V 20A Solar PWM Controller 12V/24V Auto. Suitable for 12V/24V off grid systems and three mainstream batteries. Maximum photovoltaic input of 3000W, 50V, dual USB 5V/2A output, with all-round safety protection. Matched with LCD display screen. The product is resistant to -35 ~+60 environment, IP32 waterproof, and comes with a 1-year warranty. USB output: 2 USB-5V/2A MAX.