The top graph shows the last 7 days actual power generation as reported by the National Grid. This is the total amount of power supplied into the Grid for all sources, but excluding power that is generated and used on site. As power is not stored, this can also be read as the total demand for power.
The two pie charts breakdown the generation into Brown (Traditional sources like oil, gas and coal), Green (Solar, Biomass, etc), Blue (Nuclear) and other (Imports from Europe), and a more detailed breakdown by actual generation type. This is useful to see how "Green" the grid has been over the last 24 hours.
The table gives a detailed breakdown of the data behind the charts and graph.All generation is measured in MWh.
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