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irish1958 · 12-23-06, 10:37 AM

The only way one can get more distance out of battery propulsion than out of diesel propulsion is if the recharging of the batteries is a more efficient use of the diesel engine than using it for propulsion; and/or the propulsion of the boat by battery is more efficient than that of desiel. Is it?
When running on deisel only the speed is faster so the boat is using more energy per unit of distance to push the boat than the lower speed of the battery propulsion uses to push the boat.
You can test this: drive your car at 40 mph and check your fuel usage; now drive at 80 mph and recheck it.

12-23-06, 10:37 AM	#32
irish1958 Ocean Warrior Join Date: Apr 2005 Location: Carmel, Indiana Posts: 3,250 Downloads: 320 Uploads: 11	batteries The only way one can get more distance out of battery propulsion than out of diesel propulsion is if the recharging of the batteries is a more efficient use of the diesel engine than using it for propulsion; and/or the propulsion of the boat by battery is more efficient than that of desiel. Is it? When running on deisel only the speed is faster so the boat is using more energy per unit of distance to push the boat than the lower speed of the battery propulsion uses to push the boat. You can test this: drive your car at 40 mph and check your fuel usage; now drive at 80 mph and recheck it. __________________ Irish1958