Utility Rate Database (URDB)
The Utility Rate Database (URDB) provides rate structure information for over 3,700 U.S. utilities. Rates are checked and updated annually by the National Renewable Energy Laboratory (NREL). Each record indicates the date of the last update.
The URDB allows you to search for your utility and rates to find out exactly how you are charged for your electric energy usage. Understanding this information can help reduce your bill, for example, by running your appliances during off-peak hours (times during the day when electricity prices are less expensive) and help you make more informed decisions regarding your energy usage.
Rates are also extremely important to the energy analysis community for accurately determining the value and economics of distributed generation such as solar and wind power. The URDB allows anyone to access these rates via bulk download, web interface, or computer-readable Application Programming Interface (API) for use in their tools and models. OpenEI provides an API for software to automatically download the appropriate rates, thereby allowing detailed economic analysis to be done without ever having to directly handle complex rate structures.