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Old 11-18-2012
chartscharts chartscharts is offline
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Battery Sizing - am I crazy?


My CAL29 is in need of new batteries. The existing ones are shot and won't hold a charge. I wanted to solicit opinions about downsizing drastically.

My existing batteries are a bank of two of these: Trojan EV8D, 12Volt, 220AH@20hr, batteries. They are big and weigh a gazillion pounds a piece. More than I can easily remove myself, a big disadvantage.

My needs are modest. It primarily needs to start my Farymann A30, single cylinder, 10HP diesel. I have the usual running lights and house lights and VHF radio.

My sailing habits are almost exclusively day sailing. 2-3 times a year (on good years) I'll take it out for an overnight. I could use battery powered camping lanterns on those even, since it's not very often.

So I think I might be able to drastically downsize, allowing for easier and cheaper maintenance and replacement. Going to something like two of these:

EverStart Group Size 29DC Marine Battery: Automotive :

Am I crazy? What am I not thinking of?

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