CST EV brand 30A(amperes) DC to DC converter takes 40V to 90V input voltage and provides a 12V 30A DC output voltage for camping LED Lamp, Portable Electric Lunch Box Food Heater, Electric thermal kettle, Headlights/horn/wipers/indicators/brake pump in Electric 2, 3 and 4 wheelers. Also used with solar panels to power 12 volt devices.