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Old 07-10-2015, 10:14 PM   #1
Senior Member
Brand: Thor Motor Coach
Model: Four Winds 23U
State: Illinois
Posts: 477
THOR #992
AGM Batteries

Has anyone researched AGM batteries and are they worth the money?

KNMIB is offline   Reply With Quote
Old 07-12-2015, 06:47 PM   #2
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Brand: Still Looking
State: Texas
Posts: 4,476
THOR #2121
They are becoming more popular so there most be applications where the cost premium is justified. In van conversions where the batteries often end up inside, the sealed nature compared to flooded batteries makes a big difference. And if they are placed under the van where access is limited, the maintenance-free nature is then important.

I'm no battery expert, but if I was building a Class B or having a custom one built for me where I could control what was used, I would go with AGM unless I could justify spending even more for lithium batteries.

One issue is that AGM charge best at slightly different voltages than flooded, so if connected to vehicle alternator then charging might not be optimum. Some even claim that it will shorten their life but I'm not sure it's that big an issue.

Also note that Ford Transit now comes with factory dual AGM batteries as an option. I think the trend is in that direction.
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