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Old 29-06-2009, 19:40   #8
mesquaukee
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Join Date: Jun 2009
Location: Western Caribbean & ocassionaly inCanada
Boat: Mesqua Ukee, Buccaneer 40 (Salar 40)
Posts: 350
We must remember a nasty little thing called the Peukart Effect.
You may think you just drew 50 AmpHrs of electricity in 20 minutes. You didn’t if it was:
Battery Size..........Rate of discharge....Hair dryer...Amps drawn/...Actual Used
AmpHrs (20 hrs)............20 hrs................Amps.........20 hr rate......... AmpHrs
400 ............................20 Amps.................150...............7X....................80
100 ..............................5 Amps.................150..............30X......... .........Dead
You were discharging the battery bank at a rate 150 Amps. Rated batteries capacity is the multiple of 20 hrs times the rate of discharge that empties the battery in that time.
If you want to use a hair dryer think about a 1000 AmpHr battery bank.
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