Paul, in your calculations, you can assume 30% of usable capacity of a normal flooded battery (from 50% SoC to 80% SoC), which would shift the calculations a bit towards the Lithium batteries. The problem is that you would need a completely new charging system, which would throw the calculations in the opposite direction.
Another consideration is weight. The LiFe batteries would be (roughly) 1/4 of the flooded. And yet another dimension – usability, or maintainability. The flooded batteries are very easy to maintain, most people know (or should) how to use them and even if we murder them occasionally (more often than we want to admit), they are cheap to replace. I think, this is the biggest advantage and the reason why LiFe are not gaining enough momentum. Maybe we need to give them a few years... Marek 1994 C270 Legato Ottawa, ON From: Dreuge via CnC-List Sent: Tuesday, September 24, 2019 10:03 To: cnc-list@cnc-list.com Cc: Dreuge Subject: Re: Stus-List Flooded Batteries While I have been looking into LiFe batteries, I still think Trojan T105 provide the best bang for the buck. Cost have come down a little for lithium batteries, and with industry leaders like Trojan now selling these batteries(already at better $/AH), I’m expecting reasonable price drops in the coming years. For example, a pair of T105 provides 115 usable AH (50% of 230AH @ 12V) for total price of $280. The Trojan Trillium TR 12.8 110 provides 100 useable AH (90% of 110AH @ 12V) for a price just over $1,000. If I had to replace my house bank today, I would go with 4 Trojan T105. Worst case they would last 4-5yrs but likely longer. In 5 years, one should not be surprised to see lithium prices drop by more than 25% (i.e. a cost saving of about $550 or the cost of the 4 Trojans). I know folks who highly recommend the Sam’s Club GC2 Duracell batteries. While I’m a fan of the Trojan quality, at $90/battery or $360 for 215 usable AH (50% of 430 AH), the Sam’s Club option is worth looking at especially if one is considering going with LiFe batteries later rather than sooner. To be fair, if I was full time cruising, I would weigh the sooner rather than the later. just my two bits, Paul - Paul E. 1981 C&C Landfall 38 S/V Johanna Rose Fort Walton Beach, FL http://svjohannarose.blogspot.com/ On Sep 23, 2019, at 8:16 PM, cnc-list-requ...@cnc-list.com wrote: On 9/22/2019 10:28 PM, Peter Cowenhoven via CnC-List wrote: Anyone still use flooded batteries. Looking to replace 3 weak batteries that are causing engine startng issues. Are the AGM or Gel batteries worth the $$ s. Thanks in advance. Peter Cowenhoven Branford CT Landfall 35
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