Find out the number of batteries needed to power 5 devices of 12V for 18 hours

AI Thread Summary
To determine the number of batteries needed to power five 12V devices for 18 hours, it's essential to first calculate the total load in watts. The power consumption of each device must be known to ascertain the total amperage required. Once the total amperage is established, the necessary amp-hours can be calculated. Finally, knowing the amp-hours of the batteries will allow for the determination of how many batteries are needed. Understanding the power consumption of the devices is crucial for accurate calculations.
jesschin
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Hi there, I need some help in getting this calculation done. I need to find out the number of batteries needed to power 5 devices of 12V for 18 hours. The voltage of the battery is also 12. Power of battery is 9600 watts.

Please help. Thanks!
 
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jesschin said:
Hi there, I need some help in getting this calculation done. I need to find out the number of batteries needed to power 5 devices of 12V for 18 hours. The voltage of the battery is also 12. Power of battery is 9600 watts.

Please help. Thanks!

Welcome to PF.

The real question is what is the load?

When you know the load - you know the amps.

When you know the amps needed you know the amp-hours needed.

When you know the amp-hours of the batteries ...
 
LowlyPion said:
Welcome to PF.

The real question is what is the load?

When you know the load - you know the amps.

When you know the amps needed you know the amp-hours needed.

When you know the amp-hours of the batteries ...
sorry, I don really get your point, LowlyPion. Can you explain further in depth? thanks
 
It's not enough to know what the voltage is of the devices.

You need to know how much power they consume.
 
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