Simple Calculation For Voltage Boosting

Thread Starter

boonxiong

Joined Oct 17, 2011
52
I have a battery bank, 12v Lithium-Ion 40Ah. Let's disregard discharge rate.
I want to boost it to 40volt.
I have a motor rated at 40v 500w.

How long can my battery run for?
 

Ylli

Joined Nov 13, 2015
892
Your 12v Lithium-Ion 40Ah would be 12 * 40 = 480 Wh

80% efficiency for the converter leaves you 480 * .8 = 384 Wh

The motor draws 500 W, so the battery will last 384/500 = 0.768 hours.

0.768 hours is 46 min, 4.8 seconds.
 
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