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Old 11-11-2019, 06:19 PM   #29
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Compare the specs on your 12 volt 100AH to this GC2 AGM:


https://www.samsclub.com/p/duracell-...elevance.rr0_5


Many folks with Class A's have chronic battery issues.


With a battery like the one linked to above...you should have years of maintenance free bliss.
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Old 11-11-2019, 06:52 PM   #30
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Quote:
Originally Posted by oldnavycdr View Post
I think I'll go with a pair of 12v 100 ah AGM's in parallel. Given our usage that should give us sufficient capacity. This battery bay was designed for maintenance free batteries and is not properly vented for wet cell batts. PO made a mistake (went cheap) when he replaced the batteries with the wet cell Interstates. Anyone see a problem with this plan?
Lots of good advice in this thread.

If you switch back to AGM's, be sure to check the settings for your inverter/charger. AGM's like a lower float charge of 13.2 volts. 13.6 works for flooded but is high for most AGM's.

A true battery disconnect installed near the batteries makes storing AGM's easier. With a complete disconnect, you can leave AGM's unattended for 6 to 12 months.
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Old 11-11-2019, 08:20 PM   #31
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Quote:
Originally Posted by Persistent View Post
Lots of good advice in this thread.

If you switch back to AGM's, be sure to check the settings for your inverter/charger. AGM's like a lower float charge of 13.2 volts. 13.6 works for flooded but is high for most AGM's.

A true battery disconnect installed near the batteries makes storing AGM's easier. With a complete disconnect, you can leave AGM's unattended for 6 to 12 months.
Good point, I have an older xantrex inverter/charger which has a gel setting but not a AGM setting. I think the float charge is set for 13.4 volts. Perhaps it is variable?
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Old 11-11-2019, 08:25 PM   #32
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I personally think you will be much happier with 4 Six volt Deep Cycle AGM's.


2 12's with 100AH each is pretty minimal for an American Eagle and they do not sound like true deep cycle units.



It is all about how versatile you want your coach to be. 200 AH or 640 AH in your house battery bank.


You are watching a movie in a Walmart lot and you have to stop before it is over? Then no coffee maker in the am without running the genny?


You do not want to worry about those types of things IMHO!





AGM's for sure due to the design of your Eagle's battery bay.

I'm not adverse to running the genny. I'm looking at Trojan T24 AGM or T31 AGM but I haven't settled on anything yet.
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Old 11-12-2019, 07:21 AM   #33
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Good luck with your ultimate choice.



It seems to me that you may not realize all of the duties of your House Battery Bank.


(I have never seen a 2 battery 12 volt house bank on a Class A DP).


The most critical spec IMHO is the number of minutes that battery will support a 25 amp draw which would represent a not unusual draw when using the inverter to supply 120 V AC to your 120 Volt System:


Trojan 31 AGM- 177 minutes



Duracell GC2 AGM- 409 minutes


Literally 4 times + capability with a AGM six volt system vs. what you are leaning towards for only a couple of hundred $ more in cost.



(With the Trojan 12 volt you have 2 )



(Duracell GC2 you have 4)


The Trojan's remind me of Marine dual duty batteries that I used to run in my boats. They have a CCA rating for engine starting + some reserve capacity for running your 12 volt lighting and accessories. Not true deep cycle batteries that are typically found in Class A DP's.


Just trying to help and good luck as always!
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Old 11-12-2019, 08:49 AM   #34
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Thank you. I do appreciate it.
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Old 11-12-2019, 08:55 AM   #35
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Given the restricted access to the batteries in this coach I really need to use AGM's. This saga began with the PO not servicing the batteries due to his inability (desire) to water them. AC used gells originally and designed the battery tray thusly. The PO had wet cells installed when he replaced them.
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Old 12-09-2019, 04:51 PM   #36
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Here is how this saga ended (for the moment). Source of the open neutral was the AECS transfer switch. Bad contactor or board, I'm not sure which. I swapped the shore power cable to the generator line in and all was well. Generator showed no fault when running. 120V shore power operates normally from that contactor. In the meantime I purchased 2 115 AH AGM batteries for the house. Those are happy now that they are getting shore power instead of Battery Tender. I'll likely add a 3rd soon. Next I have to either repair the obsolete AECS transfer switch or replace with a new Progressive Dynamics switch or something. And then I'll be on to the next project. Thanks to all for your assistance!
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