When you’re getting an electric vehicle (EV) charger installed at home, there’s more to it than just plugging into your existing power supply. One key player involved in the process is your DNO – Distribution Network Operator. But what exactly is a DNO, and why do they matter for your installation?
Let’s break it down.
What is a DNO?
Your Distribution Network Operator (DNO) is the company responsible for maintaining the electricity infrastructure in your local area – including the cables, wires, poles, transformers, and even some equipment in your meter box.
Think of the DNO as the middle link in the electricity chain:
- The National Grid generates and transmits electricity across the country.
- The DNO then distributes that electricity locally.
- Finally, your energy supplier sells you the electricity you use.
DNOs are region-specific and licensed to distribute electricity across different parts of the UK. You can find out who yours is by visiting the Energy Networks Association (ENA) – The voice of the networks.
What Does the DNO Do During an EV Charger Installation?
Whenever an EV charger is installed, your installer is legally required to inform your DNO. That’s because adding an EV charger increases the demand on your electricity supply – and the DNO needs to check whether your existing setup can safely handle it.
Here’s what the DNO may do:
- Assess the maximum electrical demand on your property.
- Approve or decline the installation based on supply limits.
- Carry out upgrades if necessary (e.g. upgrading your fuse or unlooping your supply from a neighbour).
- Request that your charger is “de-rated” to use less power temporarily.
Will the DNO Definitely Need to Do Work at My Property?
Not always. Most installations are approved quickly and don’t require physical changes. However, if the DNO flags any issues, they must be resolved before installation can proceed.
Possible DNO works include:
- Upgrading your main fuse
- Upgrading incoming supply cables
- Unlooping your property’s supply
- Installing a new meter
The DNO will arrange these works directly with you, and we will continue the charger installation once everything is ready.
How to Find Out Who Your DNO Is:
There are several DNOs operating across the UK, including:
- UK Power Networks
- Scottish and Southern Electricity Networks (SSEN)
- SP Energy Networks
- Northern PowerGrid
- Electricity Northwest
- National Grid
- Plus, various Independent DNOs (IDNOs)
To find out who your DNO is, visit the official Energy Networks website: Who’s my electricity network operator? – Energy Networks Association (ENA)
Got questions about the DNO process or what it means for your charger installation?
Contact us — we’re here to help.