- Mar 31, 2017
Just purchased a 1976 Catalina 27 with an Atomic 4. Not sure of the age or status of the batteries so I'm planning to replace them. However it's maddening to figure what's the best way to go. The boat has a Motorola alternator that produces 37 amps. I am new to the boating world but it seems that some batteries need a larger alternator. What would make the most sense for the boat. Any and all help is appreciated!