Q.) A partner has asked how much is the current draw of a single EVA8100/8400 disk shelf fully loaded with 300GB 15k FC disks?
A.) You can use Power Calculators for EVA4400/6100/6400/8100/8400:
Main Screen:
http://h30099.www3.hp.com/configurator/calc/Power%20Calculator%20Catalog.xls
EVA8400:
http://h30099.www3.hp.com/configurator/calc/eva8400.xls
EVA6400: