The largest investment cost is for the installed capital equipment. Each cost item for the battery under design is adjusted from the estimate of the baseline plant. The plant cost is done in a similar way with a cost of $3,000 per square meter ($280/sq. ft) including land and utilities.he goal for average battery life is 15 years and a warranted life of 10 years, with full replacement in the first five years and shared cost of replacement for the last five years seems appropriate. The vehicle owner would pay an increasing share of the cost from between 0 % at 5 years to 100 % at 10 or more years.