If doing it on the cheap, (6) 8 volt golf cart batteries in series for 48 volts should give the 2 hours and reserve usage. If not and you have the room, (8) 6 volt golf cart batteries would be more than enough. If you have a bigger budget, then AGM (absorbed glass mat) batteries would be good and can be mounted in any position or if weight is an issue, LiFePO4 cells.
Bob
From: Val Vechnyak <vechnyak@yahoo.com>
To: electricboats@yahoogroups.com
Sent: Friday, October 25, 2013 6:52 AM
Subject: [Electric Boats] Hello group
My boat is an old 1976 Catalina 30 (tall) and this past weekend we just pulled out the Atomic 4 engine. Over the winter I am planning to work on re-powering it with an electric motor. The boat is used for day sailing in the bay and short trips along the NY/NJ shore.
Information is available online about motors but battery info seems vague at least to me since I know next to nothing about battery types and their advantages. Does anyone know of any formula that would allow to calculate all the variables to achieve say 2 hours of propulsion and have a reserve?
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