In Texas we have the luxury (duty?) to select an electrical provider and a plan. We have http://powertochoose.org/, the official website of the Public Utility Commission of Texas to help Texans select a provider and a plan.
From the site we can get a general idea of the price of power, but not a detailed analysis of what the yearly cost would be because electric companies may charge different rates depending on how much electricity we use each month.
For example suppose company A charges 5 cents for all electricity under 1000 KiloWattHours (KWH), and then 15 cents for any KWH over 1000; and company B charges 15 cents for all electricity under 1000 KWH, and then 5 cents for any KWH over 1000. We have to do some math to figure out what works best for our usage. Here's an example from Green Energy Exchange's rates:
I use GeekYourRate.com/ to do the math for me. The site charges $9.95 to take my monthly usage and crank through all the plans to find the best ones for me. Usually I use less than 1,000 KWH, but for three months in the summer, I go a little above 1,000 KWH. Here's the page using my usage:
GeekYourRate recommended Green Energy Exchange as the cheapest option. I tried their website, but it would never let me proceed beyond the review button - it was always greyed out no matter what I tried.
So I went to the next company, V247. Their website worked and I enrolled.
I like GeekYourRate.com/ since it does all the math for me and can save me hundreds of dollars a year.