Heat Pump DNO Applications, Handled.
We manage the DNO connection process for heat pump installations across the UK, from checking the appropriate connection route through to application, DNO liaison and confirmation.
Why does a heat pump need DNO involvement?
Heat pumps can significantly increase a property's electrical demand. The DNO therefore needs information about the proposed heat pump and existing electrical supply so it can establish whether the installation can be connected under the applicable notification route or whether approval is required before connection.
Heat pumps sit within the ENA's Low Carbon Technology (LCT) connection process, alongside EV charge points, not the G98/G99 generation process.
There are two main routes.
Which one applies depends on the heat pump, the existing supply and other electrical loads at the property.
Route 1
Connect & Notify
Install → Connect → Notify DNO
Where the installation meets the relevant criteria (equipment, supply arrangement and existing loads), the heat pump can be installed and the DNO notified through the LCT process.
Route 2
Apply to Connect
Apply → DNO assessment → Connection decision → Install
Where prior approval is required, the DNO assesses the proposed heat pump against the existing network before the installation proceeds.
Not sure which applies? That's part of what we establish from your project information. Eligibility for Connect & Notify depends on the equipment and existing electrical supply, so we'll review the project information and follow the appropriate DNO route.
Is the heat pump ENA registered?
The proposed heat-pump equipment and its ENA database status can affect the applicable DNO connection route. We check the equipment details as part of preparing the application.
Equipment
The proposed heat pump model and its ENA Heat Pump Database status affect the applicable DNO connection route.
Existing supply
Supply arrangement, phase and cut-out rating shape the maximum demand the site can accommodate.
Other electrical loads
EV chargers, showers, immersion heaters, batteries and existing generation all contribute to the whole-system demand picture.
You install the heat pump. We'll deal with the DNO.
Send us the project and equipment information. Our team manages the DNO side on your behalf and keeps everything organised through your portal.
Connection route assessment
Determine the appropriate DNO process from the project information.
Application / notification preparation
Prepare the relevant heat-pump submission.
DNO submission
Submit through the appropriate DNO / ENA process.
DNO liaison
Deal with questions or requests for further information.
Progress management
Monitor outstanding applications and chase where appropriate.
Documentation
Keep DNO correspondence and confirmation against the project in your portal.
Send us the project information.
We'll use it to establish the right DNO route and prepare the submission.
- Installation address
- Customer details
- MPAN
- Supply phase
- Cut-out rating / photograph where available
- Existing maximum demand where known
- Heat-pump manufacturer and model
- Heat-pump electrical input / maximum demand
- Details of other significant electrical loads
- Installer details
- Proposed installation date
Other electrical equipment?
Existing loads matter.
We capture relevant existing and proposed electrical loads so the DNO receives an accurate picture of the site's electrical demand.
- EV charger
- Electric shower
- Immersion heater
- Electric heating
- Battery system
- Existing heat pump
Not just a heat pump?
The ENA uses a combined connection process for EV charge points and heat pumps. Where generation and storage are also involved, the DNO picture becomes more complex, and that's where we're most useful.
Heat pump + EV charger?
If the customer is installing multiple low-carbon technologies, let us know. We'll review the complete proposed installation and manage the appropriate DNO submission.
View EV Charger ApplicationsSolar, battery, EV and heat pump?
Multiple technologies at the same property? Send us the complete project information and we'll establish the relevant DNO requirements across the installation.
Where load management is proposed as part of the installation, we'll ensure the relevant information is included within the DNO submission where required.
Supply capacity
What if the existing supply isn't sufficient?
Where the DNO identifies that the existing service or cut-out isn't suitable for the proposed demand, additional works or a supply upgrade may be required. We'll explain the DNO response and help manage the next steps where this falls within our service.
Any network or supply-upgrade costs charged by the DNO are separate from DNO Renewables' service fee.
Submit → review → DNO → outcome.
Some qualifying applications may receive an automated or rapid decision through the relevant DNO process. Where further assessment is required, timescales are controlled by the DNO.
01
Submit
Send us the project information and equipment details.
02
Review
We establish the appropriate route (Connect & Notify or Apply to Connect).
03
DNO
We prepare and submit through the relevant DNO / ENA process, and manage any queries.
04
Outcome
DNO decision or notification confirmation is recorded against the project in your portal.
Missing site information?
Don't have the electrical information?
Our Technical Survey team can attend site to capture the existing supply and electrical information required to support the proposed heat-pump installation. Particularly useful for heat-pump companies doing remote sales.
Request a Technical SurveyWhat we capture
- Supply arrangement
- Cut-out
- Metering
- Consumer unit
- Existing loads
- Proposed heat-pump location
- Relevant photographs
Larger heat-pump projects.
Commercial buildings, care homes, schools, industrial properties, apartment developments and heat networks bring their own connection considerations.
Commercial heat-pump project?
Larger heat-pump installations may require more detailed consideration of the site's existing import capacity and proposed electrical demand. Our team can support the DNO connection process for commercial and multi-unit projects.
Discuss a Commercial ProjectLarge electrical demand?
For larger commercial electrification projects, we can investigate the existing connection and potential network capacity before the final system is committed.
View Grid Feasibility StudiesHigh-volume installer?
Installing heat pumps at scale?
DNO Renewables can manage high-volume heat-pump programmes through bulk uploads, dedicated workflows and API integration. Ideal for national heat-pump installers, ECO / retrofit programmes, social housing decarbonisation and new-build developments.