Test data is almost as important as will the company will still be there! That is why I was unhappy that LG Chem (huge company) has decided not to be a player for Offgrid. Oh well!
Dave Angelini Offgrid Solar "we go where powerlines don't" http://members.sti.net/offgridsolar/ e-mail offgridso...@sti.net text 209 813 0060 > Test data is important. If you check out most Li battery brands, they copy > each other: â2000 cycles with 80% remaining.â Like Clara Peller said > in 1984, â Whereâs the beef?â > > One brand of Li battery that we sell, LiFeBlue, has published actual test > data for their cells (Topband). At 1C rate and 100% DoD, they produced > over 2800 cycles and had 83% remaining capacity. Extrapolate to 8000 > cycles and that would mean 48.5% remaining capacity if degradation > remained linear. However, we are in fantasy land here due to the unknown > affects of battery aging on one hand and the fact that no one will use a > battery like that on the other. Besides, in a decade or so, will Li-ion > battery cost make lead batteries a relic? > > IMO, lead is deadâ¦or at least dyingâ¦slowly. > > Larry Crutcher > Starlight Solar Power Systems > > > > > On Feb 20, 2018, at 9:02 AM, Kirpal <solarwo...@gmail.com> wrote: > > Larry....yes those are big claims (8000 cyclces at 100% DOD!) No I don't > have the data showing that, nor have I seen it. But the marketing has to > be accurate right?! We have installed a few systems with a few more on > the books including one at our office. Will be interesting to see if the > real world matches the lab tests....I don't have a copy of their warranty > but it is for 15 years and does allow for some degradation of capacity, > 70% remaining after 15 years. Pretty robust for a battery warranty! From > what I have seen they are a strong off grid option. Could be one of the > last battery banks some of our customers ever buy. The visibility into > cycle count and remaining capacity is refreshing after using various amp > hour meters which tend to wander in accuracy over time. I am looking > forward to the migration away from Lead Acid in the years ahead! > > > Sunny Regards, > Kirpal Khalsa > Oregon LRT#25 > NABCEP Certified PV Installation Professional > Oregon Solarworks LLC > www.oregonsolarworks.com <http://www.oregonsolarworks.com/> > 541-299-0402_______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > Dave Angelini Offgrid Solar "we go where powerlines don't" http://members.sti.net/offgridsolar/ e-mail offgridso...@sti.net text 209 813 0060 _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
