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Middle of page, What is Amp Draw, shows you how to calculate average battery run times...

What is Amp Draw?

• Amp draw is the measurement of electrical current drawn from a storage battery (or battery), while the trolling motor is being operated at maximum speed.
• Minn Kota 's published amp draw figures represent actual on the water conditions (with all of the motor 's wiring, switches and circuitry in the electrical system as the test measurement is taken).
• Approximate length of running time when operation a trolling motor at full power can be determined with a motor 's amp draw and the battery amp hour rating.
Example: A single 120 amp hour, 12 volt battery and a 12 volt trolling motor drawing 20 amps at the highest speed setting will run for about 3.4 hours.
• The formula for the calculation is as follows:

0.85 x A.H.R.  (A.H.R.= Battery Amp Hour Rating)
          M.A.D. (M.A.D. = Motor Amp Draw)               = Hours of running time.

• As the speed setting is reduced the motor amp draw is also reduced.
• A motor drawing 30 amps at high speed may only draw 5 amps at the slowest speed. The same motor that will theoretically run about 3.4 hours at high speed will run for over 20 hours at the slowest speed.

Curmudgeon Emeritus
1998 Egret C/K 167
5,450 Posts
Yes, because it's all about you... ;) ;D

We run multiple advertising campaigns from multiple companies. We try to stay true to the outdoors, boating and angling community. Some ads, like the one you mention, come from an outdoors media outlet we have contracted with.

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