What is the voltage of the aircraft's electrical system?

The aircraft's electrical system is typically designed to operate at a nominal voltage of 28 volts. This standard is prevalent in many general aviation aircraft, utilizing a 28-volt direct current (DC) system primarily powered by a 24-volt battery, with a voltage regulator maintaining the system voltage.

This design provides a greater capacity for electrical systems and devices compared to lower voltage systems, which is advantageous for systems requiring more power or higher efficiency. The systems involved in the aircraft, such as navigation, communication, and lighting, can operate more effectively at this voltage level, ensuring sufficient performance and reliability during flight operations.

Other voltage options like 12 volts or 14 volts are more commonly associated with smaller, less complex electrical systems in general electronics rather than aviation-specific systems. While some older or smaller aircraft may operate at these lower voltages, the predominant standard for many modern aircraft is indeed 28 volts.