U.S. Electric Industry Residential Average Retail Price of Electricity by State, 2015 (Cents per kWh)
Source: Energy Information Administration
https://www.eia.gov/electricity/state

U.S. Electric Industry Residential Average Retail Price of Electricity by State, 2011 (Cents per kWh)
Source: Energy Information Administration
NPR - Electricity by state

U.S. Electric Industry Residential Average Retail Price of Electricity by State, 2007 (Cents per kWh)
Source: Energy Information Administration
http://www.kaec.org/stand/rates.htm

U.S. Electric Industry Residential Average Retail Price of Electricity by State, 2003 (Cents per kWh)
Source: Energy Information Administration
http://michaelbluejay.com/electricity/cost.html

Texas - ERCOT
https://www.greentechmedia.com/articles/read/a-snapshot-of-texas-growing-appetite-for-wind-and-solar-power

Links
Residential Electricity Prices: A Consumer's Guide
California On-Line Energy Maps

HeatPumps
Carbondale, CO

PGE
Helms Deep: Massive Storage