Re: [EVDL] Advice on new battery pack (Second thoughts)
Roger Daisley via EV wrote: Reading thru the prior comments (which I really appreciate) I am starting to wonder if I'm getting ahead of the cost curve. Maybe I should carefully consider if lithium i.e., Leaf packs, is the way to go, at this time? Another set of floodies is about $3000 and good for four to five years. Maybe by that time the cost for lithium will be substantially lower. ken via EV wrote: floodies may get 300- maybe 500 cycles @ 50% Dod if your easy on them, lithium will get 2000 cycles or more at 50% DOD, ad be Way lighter! It's actually a complicated questions, with pluses and minuses on both sides. Lead-acid is readily available, safe, simple, and cheap. You don't need a BMS or special charger, so you save money there as well. AGMs or 12v floodeds won't last long (200-500 cycles). 6v floodeds, gels, and big industrial floodeds can last significantly longer (700-2000 cycles). They are easy to recycles. The downsides are the weight, and floodeds are messy. Lithium is lighter (thus the same weight gives you more range). They offer the promise of longer life; but that assumes you get premium ones, and add a good charger and BMS, and don't "murder" them early from misuse. They are significantly more expensive, especially when a new charger and BMS are needed. Instead of corrosion, fire is a serious concern. Of course, price for either option depends heavily on whether you are buying new, or used/surplus/cheap junk. -- The ones who are crazy enough to think that they can change the world, are the ones who do. -- Steve Jobs -- Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Advice on new battery pack (Second thoughts)
On 07/17/2018 12:23 AM, ken via EV wrote: On Fri, June 22, 2018 11:38 pm, Roger Daisley via EV wrote: Reading thru the prior comments (which I really appreciate) I am starting to wonder if I'm getting ahead of the cost curve. Maybe I should carefully consider if lithium i.e., Leaf packs, is the way to go, at this time? Another set of floodies is about $3000 and good for four to five years. Maybe by that time the cost for lithium will be substantially lower. floodies may get 300- maybe 500 cycles @ 50% Dod if your easy on them , lithium will get 2000 cycles or more at 50% DOD, ad be Way lighter! Yes, it now seems pretty obvious. Especially with the salvaged Leaf/Volt modules appearing. Lithium can be found at about the same price per kwh as flooded lead. For the same capacity, lithium will weigh about 1/3, noticeably increasing performance. Lithium is likely to last several times as long as lead. Lithium generally does not have much sag during discharge, again increasing performance. Lithium will not subject your car to an acid mist which ruins electric connections and turns steel into powder. ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Advice on new battery pack (Second thoughts)
On Fri, June 22, 2018 11:38 pm, Roger Daisley via EV wrote: > Reading thru the prior comments (which I really appreciate) I am starting > to wonder if I'm getting ahead of the cost curve. Maybe I should carefully > consider if lithium i.e., Leaf packs, is the way to go, at this time? > Another set of floodies is about $3000 and good for four to five years. > Maybe by that time the cost for lithium will be substantially lower. floodies may get 300- maybe 500 cycles @ 50% Dod if your easy on them , lithium will get 2000 cycles or more at 50% DOD, ad be Way lighter! ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
Re: [EVDL] Advice on new battery pack (Second thoughts)
Roger, I think it really depends on you. There's no doubt that from a material cost and performance point of view, lithium is the right choice. Where the choice plays is how much time and effort you are willing to put in. Do you have time in your life right now (or are you already overwhelmed with responsibilities)? Do you have shop space? Do you have the know-how to do this yourself? Another way to look at it is to compare the cost of drop-in lead to having someone else do the lithium retrofit for you. What would the final cost comparison be? Peri -- Original Message -- From: "Roger Daisley via EV" To: ev@lists.evdl.org Cc: "Roger Daisley" Sent: 22-Jun-18 9:38:08 PM Subject: [EVDL] Advice on new battery pack (Second thoughts) Reading thru the prior comments (which I really appreciate) I am starting to wonder if I'm getting ahead of the cost curve. Maybe I should carefully consider if lithium i.e., Leaf packs, is the way to go, at this time? Another set of floodies is about $3000 and good for four to five years. Maybe by that time the cost for lithium will be substantially lower. What is the group thought on this? Pull the trigger ... or wait? ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
[EVDL] Advice on new battery pack (Second thoughts)
Reading thru the prior comments (which I really appreciate) I am starting to wonder if I'm getting ahead of the cost curve. Maybe I should carefully consider if lithium i.e., Leaf packs, is the way to go, at this time? Another set of floodies is about $3000 and good for four to five years. Maybe by that time the cost for lithium will be substantially lower. What is the group thought on this? Pull the trigger ... or wait? ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
