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Old 05-12-2013, 04:31 PM   #1
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1975 Argosy 26
Normandy Park , Washington
Join Date: Feb 2007
Posts: 261
Looking for a group 27 battery

Im shopping for a new battery and there seems to be a debate on optima vs. Lifeline batteries.

I have enough room for a group 27 and still unsure of what I should go with.

I mainly boondock and on a couple occasions a year we camp where it gets down in the 30's and the furnace is on all night. However, the rest of the time it's just for 1 or 2 nights and we are using the lights, pumps sparingly.

The old grp 24 batteries I had in my old Minuet seemed to sputter out after just a day so I'm willing to now invest in a good one if I could keep it under $250. I have a an Intelipower 9200 if that is a determinant?

Any advice?


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Old 05-12-2013, 05:01 PM   #2
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1975 25' Tradewind
Dewey , Arizona
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I have a GRP 27 lifeline and a 9245 converter. They have worked great for the last 6 years.

Running the furnace will use a lot of power.



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Old 05-12-2013, 05:57 PM   #3
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Olie's Avatar
2004 30' Classic
Beaumont , Texas
Join Date: Jan 2010
Posts: 89
Grp 27 battery

I have two 27's from Wal Mart. Going on 4 years old. I know they will last about 48 hr boon docking in 45 degree weather. Obviously a lot depends on how low you set the thermostat. We usually set ours at about 60 degrees. The old 24's we had were almost dead after 24 hr.

I was a little concerned about the quality of WM batteries when I bought these but have been very satisfied with them. You can buy about 4 of them for what an Optima costs.
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Old 05-12-2013, 06:26 PM   #4
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2003 30' Classic
Stratford , Prince Edward Island
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Posts: 257
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I bought two 27's from WM also. They were on sale for only $89.99 CDN each + a $5.00 environmental fee that we got back when I took in the old batteries. I don't boondock and my unit is plugged in pretty well all the time. I expect to get 5 years from these batteries. I have a solar panel that does not work and hasn't since we bought this unit three years ago. That's for another discussion. :-)
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Old 05-12-2013, 07:32 PM   #5
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1974 Argosy 20
2014 20' Flying Cloud
Kooskia , Idaho
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Wal Mart or Costco have fine semi deep cycle batteries. So does Sears. The Optima batteries are OK but much more expensive and don't last any longer, some say not as long.

I personally find that 2 golf cart batteries (Costco, about $90 each) in series is the best and most cost effective solution, assuming you have the extra height (about an inch) available in your battery box. Two will have about 20% more capacity than two group 27's in parallel, and will last longer. Your PD 9245 converter/charger will work well with them too.
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Old 05-12-2013, 08:24 PM   #6
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2005 25' Safari
North Las Vegas , United States
Join Date: May 2005
Posts: 850
Costco has them for about $87 p Tax ea.
2007 Dodge Ram Quadcab 6.7L Diesel w/jakebrake

"Better to have more then you need, then need more then you have because you don't have enough!"
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Old 07-27-2013, 08:51 PM   #7
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2007 27' Safari FB SE
Rancho Murieta , California
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Posts: 144
I have a 27FB. I am considering group 27's. I have 24's now. will the 27's fit in the factory box? any issues I need to be aware of?

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