Definition: A DNO (Distribution Network Operator) is the regulated company that owns and maintains the cables, substations and power lines delivering electricity to your home — separate from the supplier that bills you. Great Britain is split into 14 licensed distribution regions run by six DNO groups; in the North West it is Electricity North West.

When homeowners deal with their DNO

Most people never contact their DNO until they install low-carbon kit. Your installer must submit a G98 or G99 application before or shortly after fitting solar panels or a battery, and must notify the DNO when installing a home EV charger or heat pump. Older homes with a 60-amp main fuse sometimes need a fuse upgrade to 100 amps first. And if you have a power cut, call 105 — a free line that routes to your local DNO, not your energy supplier. You can find yours with the Energy Networks Association postcode lookup (checked July 2026).

DNOs also handle brand-new supply connections, loop supply separations and main fuse checks. If several homes on one street add heat pumps and EV chargers, the DNO may need to reinforce the local substation — that work happens at its cost, not yours, which is a key reason the applications and notifications exist.

DNO vs your energy supplier

You cannot choose or switch your DNO — it is fixed by where you live. Its costs are recovered through the standing charge and unit rates on your bill, which is one reason prices differ across the 14 GB regions under the Ofgem price cap.

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