U.S. Energy Information Administration - EIA - Independent Statistics and Analysis
Electricity Monthly Update
With Data for September 2013 | Release Date: Nov. 22, 2013 | Next Release Date: Dec. 20, 2013
End Use: September 2013
Retail Rates/Prices and Consumption
In this section, we look at what electricity costs and how much is purchased. Charges for retail electric service are based primarily on rates approved by state regulators. However, a number of states have allowed retail marketers to compete to serve customers and these competitive retail suppliers offer electricity at a market-based price.
EIA does not directly collect retail electricity rates or prices. However, using data collected on retail sales revenues and volumes, we calculate average retail revenues per kWh as a proxy for retail rates and prices. Retail sales volumes are presented as a proxy for end-use electricity consumption.
Average Revenue per kWh by state
The average cost of electricity increased by more than 2 percent in twenty-nine states and the District of Columbia, when compared with September 2012. Sixteen states saw average revenues per kilowatthour increase by more than 5 percent compared to a year ago. The largest increases in average retail revenue per kilowatthour were reported by Rhode Island, Louisiana and Idaho, which each had gains of over 15 percent. For the second month in a row, Rhode Island reversed a multi-month trend of declining prices and posted a 21.5-percent-rise in retail revenues in September. Louisiana continued to show a trend of rising revenues with a 16 percent increase, and Idaho had a 15.5 percent rise in revenues when compared with September 2012.
There were four states that experienced declines in average revenues per kilowatthour of more than 3 percent when compared to September 2012. Illinois declined by 7.1 percent; both Delaware and West Virginia fell by 4.8 percent; and Hawaii dropped by 4.7 percent.
Retail Service by Customer Sector
Average Revenues/Sales (¢/kWh) Retail Sales (1000s MWh) End-use sector September 2013 Change from September 2012 September 2013 Change from September 2012 Year to Date Residential 12.52 1.5% 121,235 1.7% 1,065,996 Commercial 10.59 0.4% 118,826 2.0% 1,012,600 Industrial 7.12 1.6% 80,360 -1.5% 720,642 Transportation 10.91 5.0% 630 0.2% 5,718 Total 10.45 1.4% 321,051 1.0% 2,804,956
Source: U.S. Energy Information Administration
Average revenues per kilowatthour increased nationally by 1.4 percent from last year, to 10.45 cents per kilowatthour. The transportation sector had the highest percentage increase in September with a 5-percent rise to 10.91 cents per kilowatthour. The average cost of electricity in the commercial sector rose only slightly by 0.4 percent. The residential and industrial sectors rose modestly from September 2012, by 1.5 percent and 1.6 percent, respectively.
Retail sales of electricity in three of the four sectors increased slightly from September 2012. Sales in the commercial sector increased the most, up 2 percent when compared to a year ago. Sales to the residential sector rose by 1.7 percent, while sales to the transportation sector were only up slightly, by 0.2 percent. Sales to the industrial sector dropped slightly by 1.5 percent.
Total retail sales across all sectors increased by 1 percent from last September.
In general, regional changes in retail sales tended to mirror regional weather patterns. Compared with August 2012, the Mid-West, the Mid-Atlantic, New England, California and Nevada had much milder weather and less electricity demand, and showed the greatest percent decrease. A similar pattern can be seen in the Southern states and the upper Mid-Western states, particularly Minnesota, Wisconsin and Iowa, which had warmer temperatures relative to a September 2012 and modest increases in retail sales.
The map below of percent change in cooling degree days (CDDs) shows how the changes in weather patterns were a significant driver in changes in retail sales.