(Move your cursor over the graph to see actual figures from Solar Forecast and from National Grid)
The red line is the Solar Forecast prediction. The blue line plots the latest National Grid forecast.
This chart is calculated using the methodology described here. It is updated hourly. If new irradiance estimates have been supplied during the previous hour, the forecast will be changed. The National Grid numbers are only changed once a day.Tweets by @solarforecastUK
Comments on this chart, or requests for the raw numbers should be sent to Chris Goodall (firstname.lastname@example.org or +44 7767 386696).