What are regulations for Emergency Source of Power to ships as per SOLAS ?

1. Located above the uppermost continuous deck.
2.  Readily accessible from the open deck.
3. Located at of the collision bulkhead.
4. So arranged that a fire or other causality in the spaces containing the main source of electrical power, the associated transforming equipment and the main switchboard or in any machinery space of Category A do not interfere with supply, control and distribution of emergency supplies, and 
5. Located where practicable in a space which is not contiguous to the boundaries of a machinery space of Category A or any other space containing the main source of electrical power, the main switchboard or any associated transforming equipment.

(3) Where the emergency source of electrical power is a generator, it shall-

(a) Be driven by internal combustion machinery with an independent fuel supply having a flash point of not less than 43.C (Closed Cup Test), and

(b)Be capable of started automatically on the failure of the main source of electrical power supply unless a transitional source of emergency electrical power .

(4) 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 mentioned in above paragraph 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.

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

(6) Where the emergency source of electrical power is an accumulator battery, it shall

(a) Be capable of supplying emergency electrical load, without being recharged, whilst maintaining the voltage of the battery throughout the required discharge period within 12 per cent of its nominal voltage.
(b) Be automatically connected to the emergency switchboard in the event of the failure of the main source of electrical power, and

(7) The transitional source of emergency electrical power shall-

(a)Consist of an accumulator battery capable of supplying the required services, without being recharged, whilst maintaining the voltage of the battery throughout the required discharge period within 12 per cent of its nominal voltage.

(8) (a) The emergency switchboard shall be situated as near as practicable to the emergency source of electrical power;

(b) If the emergency source of electrical power is a generator, the emergency switchboard shall be situated in the same space as the generator unless the operation of the emergency switchboard would be thereby impaired.
(c)Any accumulator battery required under this rule shall not be installed in the same space as the emergency generator.