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View Full Version : Do I NEED AGM batts for 24v


bowzonly
06-26-2014, 05:18 PM
Thinking of getting a 80 thrust troll mtr. Can I use two regular deep cycle batts or do I need two AGM's. Thanks

jimmythegreek
06-26-2014, 05:45 PM
deep cycles are fine, the majority of people use them including me on both my 24v TMs. AGMs are great for boats u have to mount batteries upside down or on their sides, otherwise tehy actually hold less juice than wet cells. Walmart maxx 29s ahve a good rating capacity wise and are 100 bucks, cant beat them. I used 31s from batteries plus in my big boat last year, only cause I need the longer runtime, otherwise I have maxx in my little boat for years

Ken Lyons
06-27-2014, 04:50 PM
The difference in capacity between AGM's and wet cells is not something you will ever likely notice. In the meantime AGM's are far more rugged, don't need to be constantly recharged over the Winter and they can't spill. They can handle deep discharges dear better than wet cells too. I have one that is 6 years old and hasn't been recharged in two years and it still reads 12.86 volts. I really tHink the preference on the part of so many is almost always based in price. You don't always get what you pay for but you really do here.

jimmythegreek
06-27-2014, 06:02 PM
hate to say it but theres a huge difference in capacity between equal size AGMs and wet cells. Yes u do get what u pay for, almost everything in life is like that. a group 29 walmart deep-cycle has 205 amp hours, the same size blue top optima has 120.....yes AGMs are lighter and can handle many more cycles, but how many guys are on the water more than weekends half the year? I use an expensive AGM for my big boat starting battery, it sits in a slip and the bilge and main need juice to start, other than that batteries plus 31's and in little boat all walmart 29s and a 27 dual purpose for main......my 80 terrova can troll the 16.5 lowe all day on the reservoir at 1.5mph, never had it get below 40%.....we r talking 7-8 hours worth of trolling

Ken Lyons
06-27-2014, 09:50 PM
The Sears Die Hard Deep cycle Marine group 24 wet cell is specified as 80 AAh. Battery art lists a bunch of 24 AGM's at between 75 and 82. I have never heard of the difference whatever it is of being anything like your example.