Please note: As of June 2026, the SPEN Heat Map datasets have been enhanced to include additional information, now covering both demand and generation constraint data. The updated SP Manweb dataset is available to view and download on our Open Data Portal. This dataset is published under a shared licence, so you'll need to register and request access to the data on the Open Data Portal.
The heat map shown below is based on the previous dataset publication. Over the coming weeks, it will be migrated to an improved, fully updated view that reflects the new data. A link to the updated heat map page will be provided here as soon as it is published.
Alternative DG Connection Offers
Alternative DG Connection Offers
For Distribution Connection requests on constrained areas of our network, shown in red colour on the maps, please click here to explore alternative connection offers.
What Next?
What Next?
To apply for a Generation Connection click here where you will find our guides and application forms.
User Guide
User Guide
For more information about how to use our Heat Map application and its additional functions, view the user guide.