The DNO

Notifying the District Network Operator.
UK District network Operators graphic

The UK electricity supply is managed by the District Network Operators (DNOs), also known as Energy Network Operators (ENOs) or Electricity Network Operators. These are different to the companies that electricity is purchased from. You can find out who is your local DNO is using this search tool Opens in a new window.

To help the DNOs plan and manage the electricity supply infrastructure, an installer of a heat pump or electric vehicle charging point is obliged to inform their DNO.

The process

The DNOs manage the process of notification via the Energy Networks Association Opens in a new window.

During 2026, the Energy Networks Association moved from a manual to an online process for notification and approval, which should make the process both simpler and quicker. The relevant website is ENA Connect Direct Opens in a new window.

Note

  • Unlike the old manual system, notification cannot be done retrospectively. It should be done prior to installation by yourself as an installer, or via your electrician.

  • Simple mini-split systems have a lower power requirement compared to electric vehicles and whole house heat pumps, and it is likely the DNOs do not consider them significant. Nevertheless, Checkmark recommends you inform the DNO via Connect Direct as required. This helps DNOs plan infrastructure and, if necessary, upgrade your service.

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