Features: Automatic identification system voltage, automatic recognition of 12/24V. Humanized LCD screen and human-machine interface double-button operation. Complete technical data to configure and modify. High efficiency 3-stage MPPT intelligent charging mode. Charging control mode can be selected, timer function can be reset for street light at night. Discharge capacity control. Amp hour discharge counter. Working storage function: record total system runtime, record error timers during runtime, record battery times fully charged. Reliable overvoltage protection, short circuit protection, overload protection, overload protection, overload protection. Accurate temperature compensation, correcting the charging and discharging voltage automatically, improving the battery life. Reverse connected round protection. Solar panels, battery, positive poles of solar charge controller are all connected to each other, adopting negative MOSFET in series control circuit. Budget: Current: 30A, 50A, 70A (optional) Rated voltage: 12/24 V USB output: 2.4A x 2 Overload (V): 13.7V / * 2 24V Over discharge current (V): 10.5-11V / * 2 24V Temperature compensation: -3mv / ℃ / cell Empty load waste: <;45mA Loop voltage drop: <;200mv Display: LCD screen Load Type: MPPT Waterproof Grade: IP32 Material: Plastic Color: Black + Orange Size: 17.5 x 14 x 4cm / 6.9 x 5.5 x 1.6in (30A), 21 x 19.2 x 5.5cm / 8.3 x 7.6 x 2.2in (50A), 22.8 x 20 x 5.5cm / 9 x 7.9 x 2.2in ( x 2 x 2 x 2.2 x 2 x 2 x 2.2 x 32A Package weight: 480g-1200g Package List: 1 x C