Steve, My reading of the Trojan data sheets is that the T1275s store 150AH (20 hr rate) while the T875s store 170AH. That should mean about 13% more range with the T875s. But the hassles of fitting in more batts with a different footprint might not justify the gain.
Btw, I also currently have a 120v Quickcharger. It's only rated for batts up to 150AH. Between that and only putting out 10 amps are the likely reasons my T875s are dying after only 500 cycles. A stronger charger is a good idea even if you go for the T1275s since Trojan recommends starting at 10-13% of the 20 hr value. That would be at least 15 amps. Peter Flipsen Jr On Aug 13, 2013 10:56 PM, "Steve Powers" <stevepowers...@gmail.com> wrote: > You just convinced me not to buy the Crowns. Too much risk. Trojans are > more proven, so if I have to spend $2k on a battery pack, I need it to > last. > Lots of cars on EVAlbum have T1275's and the consensus is that with 12 of > them I should get 25 miles (max) as long as I stay out of the cold. Many > people have got 10-15k miles out of a pack, 3-4 years of use. That's good > enough for me. Plus, they fit in the car because that is what it was > designed to so no trying to squeeze a different battery in and having cable > length or battery rack problems. I don't think the range would be any > better with 15 T875's. It's about the same amount of lead. > > The whole charging issue you mention is real. And, I believe you have to > adjust your algorithm with outside temperature and battery age. The only > way to do that is have an adjustable charger, which I do have even though > it > is a pain to adjust because there are no indicators on the pots and they > are > multiturn. Not sure with this charger (Zivan K2 that I took out of my > other > car) I can ever get it dialed in perfect, but it has to be a whole lot > better than the QuickCharger that is in there now which has no adjustment. > Don't know what algorithm QuickCharge uses, but I'm sure it isn't perfectly > matched to the T1275's. Really surprising that pack has over 10k miles on > it using that charger. I would have thought the quickcharger would have > overcharged them to death years ago. I've see what it is doing. > Basically, > it does the CC / CV, and then a maintain charge. But that maintain charge > looks like it is cooking the batteries pretty good. Unless someone had an > external timer on it, I don't see how the batteries survived that charge > algorithm. I'm sure not using it on a new set of batteries. > > > > -- > View this message in context: > http://electric-vehicle-discussion-list.413529.n4.nabble.com/Cycle-life-T-875-Interstate-Workaholic-8V-or-T1275-12V-tp4664720p4664744.html > Sent from the Electric Vehicle Discussion List mailing list archive at > Nabble.com. > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > For EV drag racing discussion, please use NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20130814/70175d18/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
