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Old 01-18-2022, 09:41 PM   #1
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Anybody replace the battery on 2017 F350 with AGM battery?Any problem with the alternator charger?
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Old 01-18-2022, 10:01 PM   #2
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I use AGM batteries to start my coach and my jeep.
'04 Newmar MADP, 1100w of solar, Rubicon toad
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Old 01-19-2022, 06:29 AM   #3
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I have now switched out 12 FLA battys to AGM between boat and MH.
Boat AGM serves house and start and charged while running from eng alternator - only change was setting shore charger to AGM profile.
MH house bank AGM with chassis still original sealed FLA. Also just changed shore charger profile setting.
I'm no expert but have done some digging & reading about alternators and AGMs. My understanding is the charging profile is very close between FLA and AGM with the biggest difference ( tenths of a volt) is in the float setting where the battys are simply being maintained with little amp flow to the batty. If too high over an extended time it can affect AGMs negatively.
Alternators (V regulators) do not normally provide a multi stage charge like shore chargers the control turns the alternator on or off based on the V of the batty. So in a sense there is no "float" where the alt remains charging at a reduced V over an extended period (days) like a shore charger.
Bottom line is AGM replacement in a chassis application should be no problem.
Some newer vehicles are putting AGM in their higher end trim levels with more bells & whistles and auto idle feature. I have only checked one but the alternators were the same and I believe internal V regulatio is the most common in auto alts.
Don & Marge
'13 Newmar Ventana 3433 - '14 CR-V TOAD
'03 Winnebago Adventurer 31Y - SOLD
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Old 11-18-2022, 08:31 AM   #4
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Originally Posted by buc1908 View Post
Anybody replace the battery on 2017 F350 with AGM battery?Any problem with the alternator charger?
I put two Odyssey Extremes in my Ď17 F350 6.7 with dual alternators almost four years ago. One small glitch that caused the alternator light to go on when I first put them in but since then Iíve had zero problems. No more leaking factory batteries and plenty of power for running the winch or lights without the fear of running them down too far.
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