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BHM's Homesteading & Self-Reliance Forum
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Go Back   BHM Forum > Homesteading > Energy > Solar

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Old 05-28-2012, 10:14 PM
jake Male jake is offline
Join Date: Sep 2010
Posts: 82
Default Marine Deep Cycle Batteries for solar set up

Hi everyone,

I see that at my local Walmart they have some Everstart marine deep cycle batteries on sale at the moment...I was wondering what the latest opinions on using marine batteries as opposed to true deep cycle batteries for a solar system are. Here are the battery specs:

Marine Battery 27DC-850N
Deep Cycle- Starting

  • 30 Warranty Months
  • 12 Mo Free Replacement
  • 675 CCA
I realize that these batteries are not the same as true deep cycle batteries...these are more of a hybrid between a true deep cycle and a starting battery, from what I understand. But for the price, $87 each, I am tempted to try them out...I can get two or three of them for the price of one true deep cycle battery.

This is for a very small 12 volt solar system of about 400 watts that I am putting together now...the batteries are the last component needed.

I would love to hear your thoughts on this...thank you!
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Old 05-29-2012, 12:47 AM
HuntingHawk HuntingHawk is offline
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Join Date: Oct 2011
Location: Florida
Posts: 1,409

If they are the ones marked 125AH on the top they are what I'm using & seem to be fine. Make sure to get distilled water to top off the batteries monthly.

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Old 05-29-2012, 02:36 PM
chrisser Male chrisser is offline
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Join Date: Nov 2007
Location: Cleveland OH / Palestine WV
Posts: 1,328

IIRC, I put two of these in our travel trailer.

Been two years and they have performed well, especially considering the price and easy availability.

Not exactly the same environment as solar, however.

I decided at the time that it was better to spend more for a better quality controller/charger and buy cheap batteries, than to spend more on batteries and run them off the cheap-o charger the camper came with. Batteries are easy to upgrade later and are, to some extent, a consumable.

So far I'm happy with that decision.
Government is not reason, it is not eloquence it is force! Like fire, it is a dangerous servant and a fearful master.

Marxism: The ultimate illusory fantasy.
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Old 05-29-2012, 06:30 PM
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12vman Male 12vman is offline
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Join Date: Oct 2003
Location: Tuscarawas County, Ohio
Posts: 1,930

Group 27 - *85-105 Amp hours* - 12 volts (Average)

I usually figure them at 60aHr. reserve. With a 400 watt array, I'd figure ~4 batteries, which would give you ~60 aHr. of "Play Room" to work with. ( @ 25% discharge)

400 watts @ 12 volts will give you ~23 amps of charge during great conditions. (Divisor of 17-Full Sun)
"Without Deviation from the Norm, Progress is not Possible".
*Frank Zappa*
"Two roads diverged in a wood, and I I took the one less traveled by, And that has made all the difference"
*Robert Frost*
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Old 05-31-2012, 02:33 AM
HuntingHawk HuntingHawk is offline
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Join Date: Oct 2011
Location: Florida
Posts: 1,409

Ya, whaever 12vman said.
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