The Red Box range of battery, aircraft start units are the ideal solution for starting the majority of DC aircraft. They are designed to start aircraft from the very smallest up to the largest business jets. There are a range of voltages (12V, 24V and 28V) and power capacities available. As standard, most DC powered aircraft only need 24V DC to start. The ground power port normally indicates 28V DC, but this is for the continuous power requirements. The onboard battery is 24V therefore you only need 24V to start. We have a large number of 24V aircraft start units available ranging from small hand portable start units to large trolley cart units.