Transforming from 12 to 240V? You need an Inverter. Need 12V from a 24 Volt source?? You need a converter. Just make sure you select a product that has the power capacity to run the device you're trying to use. AP829 24Volt input. 12Volt output. 30Amp maximum. 300W Cooling fan. Built-in indication led. Green for operation. Red for protection. C Tick approved. Packed in hang sell blister. 170mm x 105mm x 60mm