Everything Irish solar installers need to know about MPRN numbers — what they are, the correct format, where to find them, the homeowner name registration rule, common errors on NC6 and DOW forms, and the connection to the Clean Export Guarantee.
The MPRN (Meter Point Reference Number) is a unique 11-digit number that identifies a specific electricity connection point on the ESB Networks distribution network. Every electricity meter in Ireland has one. It is the identifier that ties a physical address to the network infrastructure — the pole, the cables, the meter.
For Irish solar PV installers, the MPRN is a mandatory field on:
Getting the MPRN wrong on any of these forms causes delays — sometimes significant ones. ESB Networks cannot locate the connection point without the correct MPRN, and SEAI will query grant claims where the MPRN doesn't match their records.
A valid MPRN is exactly 11 digits, with no spaces, hyphens, or other characters. Irish MPRNs typically begin with 10 for meter points in the Republic of Ireland, though this is not universal across all older connection points.
Examples of valid MPRN format:
1000000000110123456789Examples of invalid MPRN formats that will cause errors:
1012345678 (10 digits — one digit missing)10 1234 5678 (spaces included)10-1234-5678 (hyphens included)When entering the MPRN on any form, always enter it as an unbroken 11-digit string. Circaidian validates the MPRN format automatically — if the extracted MPRN from a Scoops report has the wrong length or contains invalid characters, we flag it on the review screen.
There are several reliable sources for the MPRN:
The most reliable source. The MPRN appears on every standard ESB Networks electricity bill, usually on the first or second page. It may be labelled "MPRN", "Meter Point Reference Number", or simply "Reference Number". It is 11 digits.
Ask the homeowner to check their most recent electricity bill and read the MPRN to you, or photograph it. This is the gold standard source.
The MPRN may be printed on the meter itself — on a sticker or moulded into the meter casing. The location varies by meter type and manufacturer. Smart meters (EIR11 or more recent) often display the MPRN on the screen or in the meter menu.
ESB Networks provides a MPRN lookup tool on their website. You can search by address (postcode/Eircode) to retrieve the associated MPRN. This is useful if the homeowner doesn't have a recent bill to hand.
If you use Scoops or another survey platform, the MPRN should be captured during the survey and will appear in the post-installation report. This is how Circaidian typically receives the MPRN — extracted automatically from the report. However, always verify that the MPRN was correctly captured in the survey, as survey apps sometimes auto-fill from OCR of meter photos, which can produce errors.
This is a rule that catches many installers off guard:
The MPRN must be registered in the homeowner's name (or more precisely, the electricity account at that MPRN must be in the homeowner's name) for the Clean Export Guarantee (CEG) to be processed.
Specifically:
For the NC6 and DOW grant forms, what matters is that the MPRN is correct and corresponds to the installation address. But for the CEG, the homeowner needs to be the account holder at that MPRN.
Always confirm with the homeowner that the electricity account is in their name before submitting the NC6 and explaining the CEG process.
On the NC6 form, the MPRN is used by ESB Networks to locate the connection point in their network records and register the solar system against it. If the MPRN is wrong:
This is a genuine and surprisingly common error. Installers working from memory, or working from a survey where the MPRN was incorrectly captured, submit NC6 forms with wrong MPRNs regularly.
Circaidian validates the MPRN extracted from your Scoops report — checking the format, length, and (where verifiable) cross-referencing against the address. Any anomaly is flagged before the NC6 is generated.
On the DOW Part 1, the MPRN serves the same purpose — SEAI uses it to locate the property in their database and cross-reference with ESB Networks connection records. A mismatch between the MPRN on the DOW and the MPRN on the NC6 (which was submitted to ESB) is one of the most common reasons SEAI queries a grant claim.
Because Circaidian generates both the NC6 and the DOW from the same extracted data, the MPRN is guaranteed to be consistent across both documents.
The CEG is a tariff that energy suppliers pay homeowners for electricity exported to the grid. To sign up for the CEG, the homeowner contacts their electricity supplier, who then communicates with ESB Networks to verify the solar system's registration.
The link between the solar system and the CEG application is the MPRN. ESB Networks' records (updated after the NC6 is accepted) show that the MPRN has a registered microgeneration system — which is the prerequisite for the supplier to offer the CEG tariff.
Read our full guide to the Clean Export Guarantee →
| Error | Consequence | Prevention |
|---|---|---|
| 10-digit MPRN (missing a digit) | NC6 and DOW rejected | Always verify 11 digits |
| Spaces or hyphens in MPRN | Form validation failure | Enter as unbroken number |
| Transposed digits (e.g., 10123456798 vs 10123456789) | ESB cannot locate meter | Cross-check against electricity bill |
| MPRN from a different property | NC6 registered at wrong address | Verify MPRN matches survey address |
| MPRN not in homeowner's name | CEG issues | Confirm account holder |
When using Circaidian, the MPRN is extracted from your Scoops report and automatically validated:
No need to manually type the MPRN from one form to another — it is extracted once and populated consistently across NC6, DOW, and any other generated documents.
Learn how Circaidian handles Scoops and other survey reports → Automate your NC6, DOW, and ITC workflow →
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