What are regulations for emergency power supply on ships as per SOLAS ?

1. be driven by internal combustion machinery with an independent fuel supply having a flash point of not less than 43.C (Closed Cup Test),
2. be capable of started automatically on the failure of the main source of electrical power supply unless a transitional source of emergency electrical power is provided in accordance.

If the emergency generator is arranged for automatic starting the generator and the services that would otherwise be supplied from the transitional source of emergency electrical power in compliance with the requirements , shall be automatically connected to the emergency switchboard so that such services will be supplied within 45 seconds of the failure of the main source of electrical power.

The emergency generator may be used to supply services other than emergency supplies in expectional cases for short periods if the independent operation of the emergency source of electrical power is safe-guarded in all circumstances.