Battery Cost Analysis

I've been encouraged to post my recent evaluation of the cost of various models of traction batteries for EVs. I basically ran the numbers three ways, to answer three different questions:

1) What is the cost per mile to use a particular type of battery? This is answered by the "Total, cents/mile" row under the "System Detail" section. I didn't include the cost of support systems such as charger or battery balancers because, although they may cost more for one type of battery than for another, they are a fixed cost and don't need to be replaced when the battery pack is replaced.

2) What is the overall cost to use a particular type of battery for 120,000 miles? This is answered by the "Cost, $ (incl. electric)" row under the "120K miles" section.

3) How far can you drive on a particular type of battery before you exceed the cost of buying Lithium batteries at today's prices? This is answered by the "Total Miles" row under the "Equal Lithiums" section.

The Range figures were obtained from EV Calculator, using a '92 Metro, ADC FB-4001A, Kelly controller, battery specs available online, Range calculated to 80% Depth-of-Discharge, and a driving mix of 85% @ 30-40mph in 2nd gear and 15% @ 60mph in 3rd gear.

Here are my calculations. I'll let you interpret the numbers as you like. Sorry it's showing up triple-spaced; I can't find a way to correct that.

Cost	Battery Mftr / Model
Analysis
Prices as	Optima	Trojan	Discover	Sky Energy
of 6/15/09	D34M	T-1275	EV31A-A	SE100AHA
Battery
Detail
Chemistry	SLA-AGM	FLA	SLA-AGM	LiFePO4
Cost, $	188	200	490	121
Source	amazon	batteriesin	batteries	evcompo
	.com	aflash.com	direct.com	nents.com
Voltage, V	12	12	12	3.2
Weight, lbs	43.5	84	74.1	7.04
Capacity, Ah	55	150	115	100
System
Detail
#(batts)	12	10	12	45
Voltage, V	144	120	144	144
Pack cost, $	2256	2000	5880	5445
Capacity, Wh	7920	18000	16560	14400
Weight, lbs	522	840	889	317
Range, mi	25	40	35	60
#(cycles)	600	600	600	2000
Miles/pack	15000	24000	21000	120000
Electricity, $	428	972	894	2592
(@9¢/kWh)
Total, ¢/mi	17.9	12.4	32.3	6.7
120K miles
#(packs)	8	5	6	1
Total miles	120000	120000	126000	120000
Cost, $	21469	14860	40645	8037
(incl. elec.)
Equal
Lithiums
#(packs)	3	3	1	1
Total miles	45000	72000	21000	120000
Cost, $	8051	8916	6774	8037
(incl. elec.)