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Old 23-05-2022, 14:19   #1
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Hybrid or start battery?

I am going to replace my house bank with 2 of the 6v below-
https://www.napaonline.com/en/p/BAT8144?ref=MA==



My start battery only powers the 3YM20 starter which starts instantly, and the 50A windlass which is actually powered by the 120A alternator. Would you choose the hybrid with 575 Cold Cranking Amps and 90AH-
https://www.napaonline.com/en/p/BAT8301?ref=MQ==

or the start battery with 840 Cold Cranking Amps -
https://www.napaonline.com/en/p/BAT8307?ref=Mg==



The boat is in Hawaii in a slip with shore power day sailing and some short overnights.
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Old 23-05-2022, 22:46   #2
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Re: Hybrid or start battery?

I would get the start.
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Old 24-05-2022, 00:48   #3
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Re: Hybrid or start battery?

According to TOAD Marine Supply’s ‘Yanmar Marine Battery Requirements Chart’*
The 3GM30 only requires a 70 A/Hr, 385 CCA, 455 MCA starting battery
Where:
Amp Hours x 5.5 = CCA
Amp Hours x 6.5 = MCA
* https://shop.toadmarinesupply.com/sh...y+Requirements
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Old 24-05-2022, 18:26   #4
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Re: Hybrid or start battery?

Quote:
Originally Posted by smac999 View Post
I would get the start.
Kinda leaning that way.
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Old 24-05-2022, 18:30   #5
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Re: Hybrid or start battery?

Quote:
Originally Posted by GordMay View Post
According to TOAD Marine Supply’s ‘Yanmar Marine Battery Requirements Chart’*
The 3GM30 only requires a 70 A/Hr, 385 CCA, 455 MCA starting battery
Where:
Amp Hours x 5.5 = CCA
Amp Hours x 6.5 = MCA
* https://shop.toadmarinesupply.com/sh...y+Requirements
Thanks Gord. I was pretty sure the hybrid would be adequate. I was just wondering if there was an advantage of one over the other. IE The hybrid being closer to the charging requirements of the true deep cycle ones.
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Old 24-05-2022, 18:55   #6
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Re: Hybrid or start battery?

Hybrid/marine.
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