Wind & Solar Electricity Generation

Select your market from the dropdown menu to see wind and solar electricity generation information from yesterday and forecasts for today and tomorrow.

Solar

How are these values calculated?
  Yesterday Today Tomorrow
Electricity Generated
Percent of Homes Powered % % %
Percent of Daily Cost Saved % % %
Solar Power Index

Wind

How are these values calculated?
DMA Yesterday Today Tomorrow
Electricity Generated
Percent of Homes Powered % % %
REGION Yesterday Today Tomorrow
Electricity Generated
Percent of Homes Powered % % %
Wind Power Index

Calculation Methodology

Electricity Generated (Megawatt-hours) - Estimated total amount of electricity generated. One megawatt-hour is the electricity used to light 10,000 100-watt light bulbs for 1 hour.

Percent of Homes Powered - Number of homes powered divided by the total number of homes in the geographic area. Values over 100% indicate that electricity generation exceeds the sum of electricity used in all homes.

Percent of Daily Cost Saved - Percentage of daily electricity cost saved by a household with an average-sized solar array on its roof versus using power only from the grid.

Solar Power Index (0 to 10) - Daily solar power potential scaled to a maximum of 10. Maximum value corresponds to clear sky with average atmospheric conditions (aerosols and water vapor content) on the date.

Wind Power Index (0 to 10) - Daily wind power potential scaled to a maximum of 10. Maximum value occurs when all turbines in the geographic area during the entire forecast period operate at rated capacity. A typical wind turbine operates at rated capacity at wind speeds above about 14 m/s and shuts down at wind speeds of about 25 m/s.

DMA - Television Designated Market Area, as defined by Nielsen.

Region - The specific eGRID (Emissions & Generation Resource Integrated Database) region as defined by the EPA. See methodology for discussion of eGRID regions.

Time Periods
- Yesterday: Most recent 24 hours of observed (HRRR) data available to this wind/solar tool, 04:00 - 04:00 GMT
- Today and Tomorrow: 24-hour periods starting from 12:00 GMT

View full methodology

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