Mark Hanson asked "curious if LiFePO4 dies suddenly or gradually like lead."
My experience with lead acid batteries in both a Dodge RAM pickup and in a Subaru SUV is that they were working great when I stopped at the dealership (Dodge) and pharmacy (Subaru), but when I got back in the vehicles the battery was dead. No obvious gradual decline. On Sat, Aug 11, 2018, 10:04 AM mark hanson via EV <ev@lists.evdl.org> wrote: > Thanks Cor, > > > > Yes, it has a standard 14V alternator regulated. I start and stop > frequently as skiers are getting in/out of the boat, so curious if LiFePO4 > dies suddenly or gradually like lead. I assume a small battery like this > would start fine one second and then not, so I keep a spare battery in the > boat (unless someone has any real data on this battery, couldn’t find on > the great god google) . What is the projective life, 1,5,10 years? > > > > I had an electric boat www.evalbnum.com/2749 > > but couldn’t H20 ski behind it so bought a lean burn Honda BFP60, same > engine that was in my 2000 (real) Insight 65mpg. In the alum 1200lb 6x16 > boat, gets 6.5MPG which is considered “good” most fiberglass 3400lbs are > 2.3MPG. > > > > > > Have a renewable energy day, > > > > Mark > > > > Mark E. Hanson > > 184 Vista Lane > > Fincastle, VA 24090 > > 540-473-1248 phone & FAX, 540-816-0812 cell > > REEVA: community service RE & EV project club > > Website: www.REEVAdiy.org (See Project Gallery) > > UL Certified PV Installer > > My RE&EV Circuits: www.EVDL.org/lib/mh > > FREE Solar EV Charging! ; http://www.WeatherLink.com/user/MarkHansonREEVA > > > > > > > > From: Cor van de Water [mailto:cor.vandewa...@gmail.com] > Sent: Saturday, August 11, 2018 12:19 AM > To: Electric Vehicle Discussion List > Cc: mark hanson > Subject: Re: [EVDL] Shorai LiFePO4 LFX36L3-BS12 Longevity Reviews > > > > Mark, > > I presume that your boat engine has an alternator and is generating 14v as > long as it keeps running, so not too likely that your boat suddenly dies in > the middle of the lake, but good to have backup. > > > > That said, your 4lbs battery probably has between 200 to 300 Wh of > capacity at best, using normal density numbers. > > At 12.8v this means probably 15 to 20 Ah so the usual Chinese twice (or > more) overspec. > > Cor. > > > > On Fri, Aug 10, 2018, 8:29 PM mark hanson via EV <ev@lists.evdl.org> > wrote: > > Hi Folks, > > > > I was curious if anyone has used/evaluated the Shorai LiFePO4, Lithium Iron > Phosphate LXF35L3-BS12 I bought from Amazon $250 with charger/balancer $67 > for my HondaBFP60 boat (1000cc similar to large motorcycle) claims 550 > cranking amps, 36ah but only weighs 4 lbs so probably Chinese inflated > specs. Looks more like 7-14ah MC battery. It does start the engine with > little voltage sag, 11V whereas the lead battery sags to 8V when starting. > > > > I'm concerned that it may suddenly die out in the middle of the 80 mile > lake > here Smith Mountain Lake near Roanoke, VA so keep a spare tractor battery > on > the boat just incase. I replaced a 40lb lead marine battery to save some > weight but curious about the longevity and how LiFePO4 dies, if it's sudden > or gives some warning like lead (that gets gradually saggy when starting). > > > > Have a renewable energy day, > > > > Mark > > > > Mark E. Hanson > > 184 Vista Lane > > Fincastle, VA 24090 > > 540-473-1248 phone & FAX, 540-816-0812 cell > > REEVA: community service RE & EV project club > > Website: www.REEVAdiy.org (See Project Gallery) > > UL Certified PV Installer > > My RE&EV Circuits: www.EVDL.org/lib/mh > > FREE Solar EV Charging! ; http://www.WeatherLink.com/user/MarkHansonREEVA > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20180810/8f64c602/attachment.html > > > _______________________________________________ > 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) > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20180811/d878193c/attachment.html > > > _______________________________________________ > 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) > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20180812/6130af5d/attachment.html> _______________________________________________ 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)
