[RE-wrenches] Cycle Life

[Jeff Oldham]

I've been doing jobs in Mexico for a couple of decades and have seen amazing survival of Rolls batteries in the worse of conditions and the typical replies of "what's an EQ?". I'm sold on them and here state side I have yet to see a premature failure. I've seen SANDIA and NREL reports that indicate that 80% cycling yields the best economics, i.e. $/kWh/life. I have a monster bank (32 cans -  12V @1690Ah of Hawker) in S. Mexico that is still going strong after 6 years of 70% daily DOD (2200 ~ @ 70% DOD) and to make matters worse they hoover around 95F and hit 105-110F on charging. These should have been toast a couple of years ago. With PV so cheap these days many of us are migrating towards deeper daily cycling and robust PV recovery. Happy Holidays all! -jeff


>From the Solar, Wind and Hydro powered office of Jeff Oldham/Regenerative SOLutions
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