Requesting solution from knowledgeable RV.NET collective

[RV-1_2n-FUN]

Need to replace 2yo T-105s due to my neglect and wondering if 2-12V 24DC in parallel are a wiser less expensive choice since not using MH dry-
camping?

https://www.walmart.com/ip/EverStart-Lead-Acid-Marine-RV-Battery-Group-24DC/180350522

TIA for expert opinions as always

[MDKMDK]

Missed the GR24 part. This model might fit better in your battery bay location, physical size-wise. Fewer Ah but you said you don't get off grid much, so these might work better for you. Still a decent East Penn Mfg. built battery.
https://www.samsclub.com/p/duracell-agm-deep-cycle-marine-and-rv-battery-group-size-sl34magm/prod359...

[ScottG]

To answer your question, yes a pair 12V's or even a single 12V battery will be fine if you never dry camp or don't have to run a residential fridge while parked for any blength of time.

[2oldman]

24dc is the group, not the voltage. I know, I'd never heard of it either.

[MDKMDK]

A couple of these will work on/off grid, should you find yourself in a place with no hookups.
https://www.samsclub.com/p/marine-27magm-18-mo-free/prod21234614?
Not too pricey, and AGMs are set 'em, and forget 'em. Good in hot/cold and maintenance free. Good total amp hour rate, not T105 good, but good for a night or two off shore power. No idea what your charger looks like, so get a good one, if it's an old single stage, and you'll be good to go.
Take care of that medical issue first, though. Batteries can wait.
Best wishes, and good luck with both.

[RV-1_2n-FUN]

Thanks all.

opnspaces wrote:

RV-1/2n-FUN wrote:
Need to replace 2yo T-105s due to my neglect and wondering if 2-12V 24DC in parallel are a wiser less expensive choice since not using MH dry-
camping?

https://www.walmart.com/ip/EverStart-Lead-Acid-Marine-RV-Battery-Group-24DC/180350522

TIA for expert opinions as always

If as you say you are not using the MH for dry camping. And if we can assume you are always going to be plugged in to shore power. Then buy the cheapest battery you can.

The two 12 volt batteries will work fine for you. Your current T-105's are wired in series to give you 12 volts. If you replace with 12 volt batteries then make sure they are wired in parallel so you still only have 12 volts.

Yup, the T's are in series as we all know so the 12's have to be parallel and just figure that in the 10 years we have had the MH we have never Dry Camped and due to my prostate cancer are using it even less.

[opnspaces]

RV-1/2n-FUN wrote:
Need to replace 2yo T-105s due to my neglect and wondering if 2-12V 24DC in parallel are a wiser less expensive choice since not using MH dry-
camping?

https://www.walmart.com/ip/EverStart-Lead-Acid-Marine-RV-Battery-Group-24DC/180350522

TIA for expert opinions as always

If as you say you are not using the MH for dry camping. And if we can assume you are always going to be plugged in to shore power. Then buy the cheapest battery you can.

The two 12 volt batteries will work fine for you. Your current T-105's are wired in series to give you 12 volts. If you replace with 12 volt batteries then make sure they are wired in parallel so you still only have 12 volts.

[Bill_Satellite]

If you hook up 2 12V to create a 24V circuit you will blow up everything 12V in your coach. Please DO NOT DO THIS!
You certainly could do 2 12V batteries wired in parallel to maintain a 12V output and increase the amp hours. Compare the amp hours of the 2 6V wired in series to the amp hours of your 2 batteries wired in parallel to compare the 2 options.
2 6V of 100 amp hours = 100 amp hours at 12V
2 12V of 100 amp hours = 200 amp hours at 12V

[Matt_Colie]

As you are planning to parallel a pair of 12V jars.
Your plan will provide far less available power than you had before.
I suggest that you start by looking at Sams or Costco for 6V golf cart batteries to replace the T-105s.
Then, go and by a good 4 stage converter charger and take good care of these.

Matt