What is the standard voltage for an internal combustion engine generator set starting system?

The standard voltage for an internal combustion engine generator set starting system is commonly 12 volts. This voltage level is widely used in automotive and small engine applications because it is sufficient to provide the necessary power to start the engine, while also maintaining compatibility with common components such as batteries and electrical systems.

Using 12 volts allows for practical battery sizes that are easy to handle and align with the voltage requirements of various starting motors and other electrical parts. Additionally, a 12-volt system can effectively deliver the high current needed for cranking the engine while remaining efficient and manageable.

While 6 volts and 24 volts are also seen in some historical or specialized applications, 12 volts has become the most standard due to its balance of efficiency and performance in modern equipment. The 48-volt systems are typically used in larger vehicles or specific commercial equipment, making 12 volts the most appropriate and standard choice for this context.