Interesting. To pour fuel on the fire this negative veiw of AGM's is backed up by A&N (as mentioned by some on here), often people of controversy are controversial, but that doesn't make them wrong about everything
But it doesn’t make them right about everything either. I qoute from their web pages “We think Gel batteries are too compromised for modern motorhome use”. There are many Funsters who have had great success with gels. Having dished AGM, Gel and LiFePO4 they are left with the lead acid battery invented in 1859. It has stood the test of time but I can’t believe there have been no better technologies invented since then.