Hi Ian
On (01 Dec 96) Ian Woofenden wrote to Chris Harper...
 IW> I took a 220 AH battery and took the numbers of cycles from the
 IW> curve at 5% discharge, 20%, 60% and 80%.
 IW> At  5%, it's 5400 cycles, so 5400 X 11 (5% of 220) is 59,400 AH
 IW> At 20%, it's 4,300 cycles, so 4,300 X 44 is 189,200 AH
 IW> At 60%, it's 2,400 cycles, so 2,400 X 132 is 316,80 AH
 IW> At 80%, it's 1,500 cycles, so 1,500 X 176 is 264,00 AH
Statistics can make my head ache! These figures don't indicate the effect of
discharge rate, for the tests run. I wonder if the conclusions would be very
sensitive to the rate eg 4 hr versus 20 hr discharge rate?
Assuming that the cycles you describe were to be applied daily [a common
timetable for industry eg forklifts] then the shallow case [5%] would be
functioning for almost 15 years [5400/ 365] whereas the attractive 60%
proposition would be jiggered and retired after only 6 1/2 years. One more
factor for the "equation", but important when the costs of capital 
rocurement
are considered.
Cheers..........ALEC
... If you don't go to other people's funerals, they won't go to yours.
--- PPoint 1.92
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