What are regulations for Maintenance of reserve power supply ?

Daily :-

1. On Load/ Off load test
2. If voltage fall more than 10%, that indicate battery is not fully charge or weak, require recharging.
3. If after recharging if condition in same, required replacement of battery.

On Load :-

1. All equipments connected to the battery.
2. Battery connections to equipments, leads to reduction in voltage, depending on condition and load of battery.
3. Charger should be kept off.
4. The voltage drop of the battery to be monitored
5. Load test can only be done when battery in fully charged.

Off Load :-

• Battery is not connected to any equipments is battery is floating.
• Fully charge 24v battery will show slightly more than 247 volts.

Weekly Test :-

Where reserve source of energy is not battery, the reserve source (emergency generator) shall be tested weekly.

Monthly :-

1. All battery connections and compartments shall be checked.
2. Specific gravity of each cell to be checked and recovered in the battery log book.
3. level of electrolyte.
4. Voltage of each cell to be measured.
5. A through check shall be done on security and connection of all batteries.

However in passenger ship, condition of the battery should be checked at beginning of each voyage.