[RMcNeal]

AGM are maintenance free as stated, and are less likely to be damaged by vibration. They do not off gas while charging as much as flooded lead acid batteries do, but still should be vented. I just had to replace mine this trip and had intended to go with 2 group 27 AGM batteries. Unfortunately, they were unavailable, so I ended up switching to 2 6 volt GC2 golf cart batteries in series. They are 235AH rated which should give me much more capacity than 2 92AH 12 volt batteries in parallel. I'll have to keep a check on the water levels since they are FLA batteries, but the additional capacity with the residential fridge makes it worth it. Also, I got the 6volt batteries for less than what one of the AGM group 27's would have cost if I could have gotten them.