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Old 06-25-2022, 08:13 PM   #1
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Best group 27 deep cycle batteries?

Looking for recommendations of Group 27 batteries (that are available) to replace my dying (and never great) Interstate "dual" start / "deep cycle" batteries (lots of air quotes there).


If I could just buy a pair of Trojan 27TMX and be done with it (105ah), but I can't seem to find them in stock anywhere.


Anyone have recommendations for a good quality similar lead acid battery?


Thanks.


-- Bass
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Old 06-25-2022, 08:37 PM   #2
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After a considerable amount of research, I recently bought a pair of VMAX SLR100 batteries. Great reviews and I have no complaints at all.

I have the fiberglass tubs underneath the floor behind each rear tire so I was limited in battery height. Lifeline, Renogy, etc. were too tall for my application.

https://www.amazon.com/SLR100-100ah-...ps%2C74&sr=8-3
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Old 06-26-2022, 08:06 AM   #3
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For starting or for house use?
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Old 06-26-2022, 03:51 PM   #4
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For starting or for house use?

House. Two in parallel. Contemplated going 6 volt and in series but doesn't actually get me any more amp hours and would probably require upgrading wiring sizes.


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Old 06-26-2022, 03:52 PM   #5
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After a considerable amount of research, I recently bought a pair of VMAX SLR100 batteries. Great reviews and I have no complaints at all.

I have the fiberglass tubs underneath the floor behind each rear tire so I was limited in battery height. Lifeline, Renogy, etc. were too tall for my application.

https://www.amazon.com/SLR100-100ah-...ps%2C74&sr=8-3

Thanks for the direction and feedback. I'm in similar situation, have one battery under the gaucho which I could probably go taller on but the second battery is in the tub under the floor and will only take a Group 27.


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Old 06-26-2022, 05:09 PM   #6
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Best group 27 deep cycle batteries?

Batteries plus has Deka/East Penn deep cycle AGMís rebranded as Duracell, Iíve had good luck with them.
Interstate also has a deep cycle AGM that several up-fitters use as their preferred house battery if not going LiPo
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Old 06-26-2022, 05:36 PM   #7
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Originally Posted by basssears View Post
Looking for recommendations of Group 27 batteries (that are available) to replace my dying (and never great) Interstate "dual" start / "deep cycle" batteries (lots of air quotes there).


If I could just buy a pair of Trojan 27TMX and be done with it (105ah), but I can't seem to find them in stock anywhere.


Anyone have recommendations for a good quality similar lead acid battery?


Thanks.


-- Bass
I order online from Batteries Plus - their group 27 Duracell AGM deep cycle. 10% off when ordering on line and pick up at store. They have lasted 6 years now (fingers crossed). They are only 92AH which I think is normal for group 27.

https://www.batteriesplus.com/produc...7m/sli27magmdc
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Old 06-28-2022, 06:11 PM   #8
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My costco has pretty darned close size AGM. YMMV. Running it in my land cruiser and so far so good. Was $150
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Old 06-30-2022, 02:32 PM   #9
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I replaced my lead acid house battery with a Universal Power Group UB121000 AGM battery I found on Amazon. I have the same space limitations since the battery is in a plastic box located in a size specific cabinet. I looked at a Li-Ion battery but decided against it due to the size constraints, cost, and I would have had to replace my solar controller. Itís been installed since December 2020 and has worked flawlessly so far.
Happy hunting, lots of options out there.
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Old 06-30-2022, 05:00 PM   #10
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I replaced my lead acid house battery with a Universal Power Group UB121000 AGM battery I found on Amazon. I have the same space limitations since the battery is in a plastic box located in a size specific cabinet. I looked at a Li-Ion battery but decided against it due to the size constraints, cost, and I would have had to replace my solar controller. Itís been installed since December 2020 and has worked flawlessly so far.
Happy hunting, lots of options out there.
I was seriously considering lithium as well before I bought my VMAX batteries last month. If I recall correctly, there was only one Chinese vendor making ones that would fit in the fiberglass SMB battery tubs. All other were way too tall.
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