DNO application checklist

Everything the network operator needs, before you submit.

Most rejections have nothing to do with the installation. They are a missing MPAN, an unreadable earthing photo or a file over the size limit. Work through this before you submit and the application goes in once.

United Kingdom only. Which form applies depends on the equipment and your network operator.

Site and customer

The operator has to be able to identify the supply without ringing you.

  • Full site address including postcode, matching the address on the supply
  • MPAN for the property, taken from the meter or a recent bill rather than from memory
  • Customer name and contact details for the connection
  • Whether the property is domestic or commercial

The existing supply

Capture this on site. Reconstructing it later is how applications stall.

  • Single phase or three phase
  • Main fuse rating as marked at the cut-out
  • Earthing arrangement (TN-C-S, TN-S or TT)
  • Consumer unit make, type and available ways
  • Any generation or storage already connected at the property

The equipment being connected

Model numbers, not descriptions. "7kW charger" is not enough.

  • Make, model and exact rated output of each device
  • Device type: charge point, inverter, battery storage, heat pump
  • Number of units and, for chargers, whether load management is fitted
  • Whether the device is on the relevant type-tested register
  • Proposed mounting position and cable route

Evidence and photographs

This is where most resubmissions come from. Check each one is legible before you leave site.

  • Consumer unit, open and closed
  • Meter and cut-out, with the MPAN readable
  • Earthing arrangement and main earth conductor
  • Proposed equipment location and the route back to the board
  • Each image within the gateway’s file size limit and still readable after compression

The installer side

The operator needs to know who is doing the work and under what competence.

  • Installer or company identifier held by the network operator
  • Relevant accreditation or scheme membership reference
  • Planned installation date, where the process asks for one
  • A contact who can answer a query quickly, because queries are the long pole
Why applications bounce

Four rejections that have nothing to do with the work

“The photo was too large.”

A perfectly good consumer-unit photo gets rejected on file size, and the application waits another week.

“We cannot identify the supply.”

A missing or mis-typed MPAN means the operator cannot match the property to a supply.

“Which earthing arrangement?”

Left blank on site because someone assumed it could be filled in later.

“Nobody answered the query.”

The operator asked a question by email and it sat in an inbox rather than against the job.

Questions

DNO applications, answered

Which form do I need?+

It depends on the equipment and the network operator. Rather than guess, capture everything on this checklist: the same information underpins the notification whichever route applies. installHUB selects and pre-fills the right form from the survey.

Do I apply before or after the installation?+

That depends on the equipment and the operator. Some connections are notified after commissioning, others must be approved before work starts. Confirm with the operator for the specific installation, and never assume the rule from a previous job carries across.

Does this apply outside the UK?+

No. This checklist covers the UK arrangement, where applications go to a distribution network operator through ENA Connect Direct. Other territories have different processes.

Can installHUB submit the application for me?+

Yes. The survey data maps into the application and it is submitted through ENA Connect Direct without leaving installHUB, with status and operator comments tracked against the job.

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Related guide

Before the checklist, the question it assumes you have already answered: is this a G98 notification or a G99 application?

Read the guide →
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