We live in Alameda County, east side of San Francisco area. When I checked our recent utility bills for the past few months (before getting our Clarity), our electric rates (per kWh) is 21 cents for Tier 1 and 28 cents for Tier 2. PG&E only allows 327 kWh per month in Tier 1, then rate jumps to Tier 2. These rates are before taxes and other additional charges. My wife can charge at her work place for only 15 cent/Kwh. I can charge at my work for $1/hour. It looks like charging in public is cheaper than charging at home. Is my calculation right on this? Thanks.