[RE-wrenches] Li+ Systems Puerto Rico

[Starlight Solar Power Systems]

Test data is important. If you check out most Li battery brands, they copy each other: “2000 cycles with 80% remaining.” Like Clara Peller said in 1984, “ Where’s the beef?”

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 dead…or at least dying…slowly. 

Larry Crutcher
Starlight Solar Power Systems




On Feb 20, 2018, at 9:02 AM, Kirpal <solarworks at 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
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