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Old 06-17-2014, 09:17 PM   #4 (permalink)
Cobb
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If you are a real engineer student, you should go 170% over your needs for a good safety margin. Then when it comes to battery ratings of amp hours that assumed 100%, however if you go to 80% or more you will measure your lifetime in weeks vs years.

So in theory, assuming no resistance or losses, your 80 amp load will likely get 20 minutes from your 40 amp battery.
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