File an automatic DNO application

The DNO registration step files a live application with the Distribution Network Operator (DNO) through ENA Connect Direct. You get the customer's letter of authority, fill in a form built from ENA's own schema and submit it. The DNO's status, comments and decision then show on the step.

Before you start

• Your company is a UK company. The MCS paperwork and every ENA action are available to UK companies.
• You have editor rights or higher.
• The project has an MPAN. The form prefills it from the project. ENA rejects an application whose MPAN it can't look up.
• The technologies are planned on the offer variant. The form pre-selects them: the inverter as Solar PV, battery items as Battery, the heat pump as Heat pump and wallbox items as EV charger. ENA covers Solar PV, Battery, Heat pump and EV charger (AC).
• You have one photo of the cut-out. ENA asks for it in focus, taken within 1 m, with the whole cut-out visible, centred and well lit. Keep the file at 5 MB or less, with a file name under 45 characters.
• Supporting files are ready if the DNO is likely to ask for them, for example datasheets (PDF or image).

Open the DNO registration step

1. Open the project and go to its MCS tab, headed MCS paperwork.
2. In the sidebar, pick the offer variant in the Variant dropdown. The MCS record follows the selected variant.
3. Click DNO registration in the sidebar.

Get a letter of authority first

The application is made on your customer's behalf. Request the letter of authority before you start the ENA application.

1. On the Letter of authority card, click Request signature. A UK example preview is shown. To change the wording, click Edit the letter.
2. Click Send to customer.
3. Confirm Send the letter of authority to the customer?. The customer gets an email with a Customer Portal link to review and sign the letter.
4. Follow the status tag: Not sent, then Pending signature, then Signed.
5. Click Open signed letter to view the signed letter. The signed PDF is also saved to the project's files.

Submit the application

1. Click Automatic application via ENA Connect Direct. The form opens with the tabs General, Basic Info, Details, Existing Devices, New Devices, Cut-Out Image and Attachments.
2. On General, confirm the Technologies being installed and the ENA username, which defaults to your email. If you change the technologies, answers that no longer apply are removed.
3. Work through Basic Info and Details. The fields come from ENA's schema for the technologies you chose, so they differ from job to job. Customer details, the object address, the MPAN and the installer's details are prefilled from the project.
4. On Existing Devices and New Devices, add one device card per device with Add a device, and choose its technology in Select LCT.
5. Click Search ENA register, enter a model number or pick a manufacturer, and click Search.
6. Click Select on the matching entry. Each result carries a compliance tag.
7. If the device isn't in the register, switch to Manual device input and enter it yourself.
8. On Cut-Out Image, upload exactly one cut-out photo.
9. On Attachments, add any Supporting files (optional).
10. Move between tabs with Next and Back. The first Next on a tab with gaps highlights them in yellow. Click Next again to move on anyway.
11. Click Submit to ENA. If a tab still has gaps, Reonic takes you to the first one.

The draft saves when you click Save draft or Next, switch tabs or close the form. After a successful submission you see "Application submitted to ENA", and the step shows the status Awaiting Assessment.

Track the application

The submitted view shows the status, Application ID, DNO, Technologies, Expected route, Last status change, the DNO's comments and the Export MPAN. The submitted files are listed under their original file names.

Statuses refresh automatically every 15 minutes while the application is being worked on. Click the refresh button to update at any time. Statuses are shown exactly as ENA returns them.

The DNO's decision appears in the DNO decision block: approved, approved with limit, further information required, DNO works required, or failed.

1. Open DNO correspondence to read the DNO's comments.
2. Click Reply to the DNO or Message the DNO.
3. Click Send. Replies go out under your email.

Confirm commissioning

1. Once the application is approved, click Confirm commissioning. It appears for applications with a generation technology, in a status that allows commissioning.
2. Fill in the form ENA prescribes in Commissioning via ENA Connect Direct. ENA chooses the form (below or above 3.68 kW) and the device cards. The commissioning date defaults to today.
3. Click Submit commissioning.

The DNO's commissioning response brings back the export MPAN, which then shows on the step. If the DNO returns Commissioning Update Required, the form reopens with your previous answers and files so you can correct and resubmit.

Fix or change an application

To change a submitted application, amend it or replace it.

• Amend application reopens the submitted answers. Submit amendment updates the same ENA application under the same application ID. It's offered in a status that allows changes, for applications that include a generation technology.
• Start new application reopens the answers and attachments, and creates a separate ENA application when you submit. The old one moves to Superseded applications. If the old application is still open or under assessment, tell the DNO it's superseded.
• Discard changes restores the submitted application unchanged while you amend or replace it.

For a demand-only application, such as heat pump or EV charger only, use Start new application.

File manually instead

If you registered with the DNO directly, click Mark as completed under Completed the DNO application outside of Reonic?. It's offered before and after an ENA submission. The step then reads DNO application completed outside of Reonic and counts as complete. Click Undo to reverse it.

Things to know

• When the step counts as complete: when it's marked as completed outside Reonic, when an export MPAN is present, or at Commissioning Accepted, since some DNOs never issue an MPAN. A failed status counts as incomplete. Every other submitted status counts as pending.
• Expected route is Reonic's estimate, worked out from the planned AC output. ENA doesn't report its own routing back.
• Some statuses refresh when you open the step. After a decision, a failure or Commissioning Update Required, the automatic refresh stops. Opening the step refreshes the status, and the refresh button always works.
• Your replies take up to an hour to settle in the thread. A message you just sent shows as a temporary entry until ENA returns it in the thread.
• ENA removes applications after 6 months. Reonic stops refreshing them after that.
• A configuration error that asks you to contact support means the connection to ENA needs attention on Reonic's side. Contact your Reonic account manager to resolve it.
• Other MCS documents are uploads. The MCS certificate, EIC, BUS voucher and financial protection go into the handover pack, which also has its own upload section for the DNO approval.

Last updated on November 9, 2026