How to Notify the DNO for EV Charger Installations
When planning a charger installation for your electric vehicle (EV), one essential but often overlooked step is notifying your Distribution Network Operator (DNO).
The DNO is responsible for maintaining your local electricity grid, ensuring it’s safe, stable, and capable of handling additional electrical demand from your EV charger.
Failing to notify the DNO can cause safety issues or even invalidate your installation. This guide explains what a DNO does, when and how to notify them, and how Pro EV handles the entire process for you, from fuse upgrades to final approval.
What is a Distribution Network Operator (DNO)?
A Distribution Network Operator manages the electricity cables, substations, and connections that deliver power from the National Grid to homes and businesses.
There are six main DNOs in the UK:
- UK Power Networks
- SP Energy Networks
- Electricity North West
- Northern Powergrid
- Scottish & Southern Electricity Networks (SSEN)
- National Grid Electricity Distribution (formerly Western Power Distribution)
When you have a new electric vehicle charge point installed, your installer must inform the relevant DNO so they can record and approve the additional load on your property’s connection.
Why the DNO Needs to Be Notified
Connecting an EV charger adds significant electrical demand to your home. Most 7 kW chargers use 32 amps, which can push your household load close to or above your supply limit. The Distribution Network Operator checks that:
- Your supply and fuse rating can handle the charger safely.
- The local network has enough capacity to support extra demand.
- Your electric vehicle charge point installation complies with electrical safety standards.
- A fuse upgrade or new service cable is arranged if required.
Notifying the DNO is a legal requirement under UK Wiring Regulations (BS 7671) and the Energy Networks Association (ENA) process for low-carbon technologies such as EV chargers and heat pumps.
When You Need to Apply vs Notify
Whether your installer must apply for approval before installation or notify the DNO afterwards depends on your home’s total load.
|
Scenario |
Action Required |
Handled By |
Typical Timeline |
|
Single EV charger (≤ 7.4 kW) with supply ≥ 80 A |
Notify DNO after installation |
EV charge point installer |
Within 28 days |
|
Single EV charger where total load > 60 A or supply < 80 A |
Apply for pre-approval before installation |
Installer / DNO |
10–20 working days |
|
Charger + heat pump or multiple charge points |
Application required before work |
Installer |
15–30 working days |
|
Fuse upgrade required (e.g. 60 A → 100 A) |
DNO must approve and schedule visit |
DNO / Installer |
2–8 weeks |
If your home has an older 60-amp supply, your installer will apply for a fuse upgrade before completing the charger installation. This is often free of charge from your DNO.
Step-by-Step: How to Notify the DNO
- Pre-installation survey – Your EV charge point installer checks your main fuse, service head, and meter tails.
- Load calculation – They calculate your home’s maximum demand to see if your system can support the new charger.
- Application or notification –
- If total load is under 13.8 kVA (≈ 60 A), we can notify the DNO after installation.
- If it exceeds this limit, an application must be sent before work starts.
- Fuse upgrade (if needed) – The DNO may arrange a higher-capacity fuse (80 A or 100 A) or new service cable.
- Confirmation – The DNO logs the new connection and updates their records to reflect your new electric vehicle charger.
Pro EV handles this entire process; we liaise directly with your Distribution Network Operator, file all paperwork, and keep you updated at each stage.
Fuse Ratings and Load Capacity
Your electric vehicle (EV) charger draws substantial current, so understanding your fuse rating is essential.
|
Fuse Rating |
Typical Supply |
Charger Compatibility |
|
60 A |
Older homes – limited |
Requires DNO approval or fuse upgrade |
|
80 A |
Standard domestic supply |
Suitable for one 7 kW charger |
|
100 A |
Newer homes / upgraded supply |
Supports charger + heat pump or two EVs |
If your fuse is below 80 amps, your installer must notify or apply to the DNO before connecting your charger. Pro EV arranges fuse upgrades and confirms safe load distribution across your property.
DNO Notification vs Approval – What’s the Difference?
- Notification means your installer can install the charger immediately, then report it within 28 days.
- Approval means your DNO must first assess your connection and confirm it’s safe to proceed.
Both processes ensure your home’s connection to the National Grid remains safe and balanced as more EV owners install chargers across the UK.
How Long Does DNO Approval Take?
The timeline varies depending on the network operator and region:
- Notifications: logged within 28 days post-installation.
- Pre-approval applications: typically processed within 10–20 working days.
- Fuse upgrades: usually scheduled within 2–8 weeks, depending on engineer availability.
We coordinate directly with your Distribution Network Operator (DNO) to keep projects on track, preventing unnecessary delays to your charge point installation.
What Happens if the DNO Isn’t Notified?
If for some reason, your installer fails to notify the DNO, the installation becomes non-compliant under UK electrical standards.
This can then lead to:
- Overloading your local circuit or main fuse.
- Safety risks or supply interruptions.
- Problems when selling or insuring your property.
- The DNO requesting a post-installation inspection or disconnection.
Always choose a certified EV charge point installer who is registered under a Competent Person Scheme (e.g. NICEIC or NAPIT).
The Cost of Notifying or Applying to the DNO
The good news is that DNO notifications are free of charge.
If your home needs a fuse upgrade, most operators offer this at no cost for simple replacements. Only more complex upgrades, such as installing a new cable or additional supply, may incur fees, which your installer will always confirm before work begins.
How Pro EV Handles DNO Notification
At Pro EV, every installation includes full DNO compliance:
- We perform a pre-installation electrical survey to check your fuse size and supply rating.
- Submit all required ENA or DNO forms on your behalf.
- Arrange fuse upgrades or capacity checks if needed.
- Provide proof of DNO notification with your completion certificate.
- Guarantee your installation meets all EV charging infrastructure safety and reporting standards.
This ensures your charger installation is fully approved, safe, and future-ready.
Key Takeaways
- All EV charger installations must be notified to your local Distribution Network Operator (DNO).
- Homes with fuses below 80 A may need a fuse upgrade before connecting a charger.
- Professional installers handle the process, usually within 10–20 working days for approval.
- Notifications are free, and upgrades are often free or low-cost.
- Pro EV manages DNO applications and fuse upgrades from start to finish.
Frequently Asked Questions
Do I need to contact the DNO myself?
No. Your EV charge point installer will notify the Distribution Network Operator on your behalf as part of the installation.
What if I already have a 60 A fuse?
Your installer will request a fuse upgrade from your DNO. Most upgrades to 80 A or 100 A are free.
How long does DNO approval take?
Usually 10–20 working days, though fuse upgrades may take up to eight weeks, depending on the National Grid area.
What if the installer doesn’t notify the DNO?
You could face compliance issues or a safety inspection. Always use a certified EV charge point installer registered under a Competent Person Scheme.
Is there a cost for DNO notification?
No, it’s free. Only significant infrastructure work, like new service cabling, may incur additional costs.
Can I install more than one EV charger?
Yes, but your DNO must assess your total load. Pro EV can apply for pre-approval to ensure your system supports multiple chargers safely.
Install Your EV Charger with Pro EV
Whether you’re adding your first electric vehicle charger or upgrading to a faster system, Pro EV ensures full DNO compliance from start to finish.
Our certified engineers handle all DNO notifications, fuse upgrades, and safety checks, ensuring your charge point installation meets national standards.
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