MPAN and DNO.
MPAN (Meter Point Administration Number) sometimes called an "Electricity Supply Number" is a unique 12-13 digit number that identifies the specific electricity supply point for a property in the UK. It’s used by electricity suppliers and network operators to ensure energy is correctly tracked and billed.
What an MPAN number does
Identifies your supply point.
It tells energy companies exactly where electricity is delivered, similar to an address for your power connection.
It will appear on your electricity bill and will usually be found in a box labelled “MPAN” or “Supply Number,” typically in the bottom section of your bill.
This number is issued by your local Distribution Network Operator (DNO) Each DNO manages supply points in its region.
What is a DNO?
Across the UK, the electricity network is separated into individual regional areas, with each regional electricity grid controlled by the local Distribution Network Operator (DNO). Each regional grid is connected to the main National Grid. Within their respective areas, each DNO controls and operates substations that transmit electrical power to all users, including homes and businesses. When we generate power through solar, or we are taking from the network with the likes of heat pumps, the DNO needs to make sure we are not sucking too much power or pushing too much power back down the power lines.
Who are the UK’s DNOs?
The map below is from the Energy Networks Association, which highlights how the UK’s electricity network is divided. The seven DNOs are as follows:
Why an MPAN is important for solar generation
When you install solar panels or any system that exports power to the grid (e.g., through a Smart Export Guarantee or Feed-in Tariff), your MPAN is needed for,
1. Export registration.
To receive payment for excess electricity you export, your supplier needs your MPAN to register your export meter.
2. Meter linking.
The MPAN connects your property’s generation meter to the correct supply account, ensuring accurate export readings.
3. Grid management.
Network operators use MPANs to track local generation and balance grid supply and demand.
4. Energy switching.
If you change suppliers or apply for an export tariff, the MPAN ensures the new company connects the correct meter.
In short:
Your MPAN number uniquely identifies your electricity connection** — essential for billing, export payments, and registering your solar generation with energy suppliers.