Well, need some input: If two 100 amp hour lead acid batteries did the job for my usage in my old trailer, will one AGM 100 amp hour battery do the job in the new trailer. Typical usage when dry camping: up in the morning and after breakfast may or may not run generator, will as needed run lights, pump, exhaust fan, fridge light, radio and typical daily stuff. Evening time, usually after dinner, while she is doing dishes, clean up etc. run the generator for a couple hours give or take and make coffee if in an area not allowing gen operations early, then by evening, if the furnace runs, pump, lights etc then up in the morning and it starts again. So the new trailer will have led lights and old one had regular lighting. I am thinking I will be able to make it with one AGM group 31 100 amp hour instead of the two lead acid group 29 with a total of 200 amp hours. I am trying to eliminate the double battery situation without going ove about $250. Si input is welcome. Lifeline makes a GPL 31 XT with 125 amp hours. So I think I cando just one. Again, input is welcome.Thanks Jeff

Probably the biggest draw you'll have is if you run the furnace frequently during the night. If you can conserve battery power there, you should do fine. Having the generator running during the evening chores will help keep you battery at peak when you go to bed later.

jffnkrn wrote:Well, need some input: If two 100 amp hour lead acid batteries did the job for my usage in my old trailer, will one AGM 100 amp hour battery do the job in the new trailer.Depends on what you mean by 'did the job.' If you drew them down 25%, then the answer would be yes. Much more than that, no. AGM ah's are the same as LA ah's.

Take a look at this usage chart before pulling the trigger.RV 12 volt usage

for most peoples use I feel AGM,s are to coatly you can get two wet cells for less than a good agm.

I agree that AGM batteries are expensive, but they sure are nice - never any corrosion in the battery compartment, never any need for adding water, and mine lasted close to twice as long as any floating acid battery I ever had. I just wish my new MH had them. I will probably eventually go back to them, costly or not.Ed Headington

AGM vs Lead Acid | Good Sam Community

20 Replies

Veebyes
Explorer II
May 24, 2015
Ever notice that most who have AGMs swear by them now & have no plans on going back to wet cells while those who have never tried AGMs harp on the price of AGMs while buying new wet cells every few years & putting up with all of that maintenance stuff?

I'm sticking with my Lifeline AGM, a 4D case size, that is now into its 5th season & going strong. When it gives out in 3 or 4 more years I am buying another.
mockturtle
Explorer II
May 24, 2015
I've had AGMs in two motorhomes and would never go back to lead acid. Maybe some people enjoy messing with their batteries. I don't.
seaeagle2
Explorer
May 24, 2015
The Trojan battery brochure basically says if you don't need the AGM for a reason, lead acid performs the same electrically for less money.
pianotuna
Nomad III
May 23, 2015
No.

jffnkrn wrote:
I am thinking I will be able to make it with one AGM group 31 100 amp hour instead of the two lead acid group 29 with a total of 200 amp hours. I am trying to eliminate the double battery situation without going ove about $250. Si input is welcome. Lifeline makes a GPL 31 XT with 125 amp hours. So I think I cando just one. Again, input is welcome.
Thanks Jeff
Home_Skillet
Explorer II
May 23, 2015
I've had so many issues with AGM (Optima) batteries. I went back to the lead acid-way better in my opinion.
eheading
Explorer
May 23, 2015
I agree that AGM batteries are expensive, but they sure are nice - never any corrosion in the battery compartment, never any need for adding water, and mine lasted close to twice as long as any floating acid battery I ever had. I just wish my new MH had them. I will probably eventually go back to them, costly or not.

Ed Headington
midnightsadie
Explorer II
May 23, 2015
for most peoples use I feel AGM,s are to coatly you can get two wet cells for less than a good agm.
Dakota98
Explorer
May 23, 2015
Take a look at this usage chart before pulling the trigger.

RV 12 volt usage
2oldman
Explorer II
May 23, 2015
jffnkrn wrote:
Well, need some input: If two 100 amp hour lead acid batteries did the job for my usage in my old trailer, will one AGM 100 amp hour battery do the job in the new trailer.
Depends on what you mean by 'did the job.' If you drew them down 25%, then the answer would be yes. Much more than that, no.

AGM ah's are the same as LA ah's.
TucsonJim
Explorer II
May 23, 2015
Probably the biggest draw you'll have is if you run the furnace frequently during the night. If you can conserve battery power there, you should do fine. Having the generator running during the evening chores will help keep you battery at peak when you go to bed later.

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AGM vs Lead Acid

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