battery capacity

Thread Starter


Joined Dec 12, 2010
What reserve capacity must a battery have if it is required to supply the following emergency services for a period of 4 hours? It should be assumed that under emergency conditions the stated pumps will be required to operate continuously.
• Navigation lights requiring 300 Watts • Escape lighting totaling 1.2 kW • Emergency bilge pump of 850 Watts • Emergency fire pump of 1.5 kW