In Excel:
B3= Waterline length in feet
B4=Weight in lbs
B7=Motor current in amps
B8=Battery bank voltage
B9=Efficiency (85% is a typical number)
B10=C20 bank capacity
B12==+B7*B8*B9/746
B14=124.18*POWER((B7*5/(B10/20)),-0.1526)/100 (capacity reduction for Peukert effect of AGM battery)
Speed=10.665/(POWER(B4/B12,0.33))*SQRT(B3)*1.15
Range in miles =+B19*B16
----- Original Message -----From: stefSent: Sunday, November 21, 2010 2:28 PMSubject: [Electric Boats] Battery adviceHello,
I have laid my hand on 31Pcs. of exide batteries, 61Ah c10 /65Ah C10, type " Exide sprinter P12V1575.I assume these are excellent batteries to use in a electric boat.I want to convert a regular outboard to electric with the use of a MARS or ETEK style motor, and use in on 48 volts, just like the parsun design.Since these batteries are deep usage types (15 minutes on 1575W load), they can deliver good high current, and i want to use four banks of 4 batteries, and get decent milage.I have no boat yet, as i want to purchase one that fit my needs in terms of capacity in power that i have reasonably available.Any advice if this would be a nice setup for a ship to cruise plusminus 5 hours with approx. 5-6 miles in speed?How can i calculate these figures?Thanks.
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