Compliance & standards

Built on the standards the DNOs enforce.

Headroom screens, designs and generates document packs against the same Engineering Recommendations a Distribution Network Operator applies when it assesses a connection. No shortcuts, no bespoke interpretations.

EREC G98 · G99 · G100 · ENA data sources · UK GDPR
Engineering Recommendations

The standards we work to

These are the Energy Networks Association recommendations that govern how generation and storage connect to the GB distribution network.

EREC G98

Micro & small generation

Fully-type-tested units up to 16A per phase (single premises). Connect-and-notify: the installer registers the connection with the DNO.

  • Typical domestic solar & small battery
  • Notification pack generated automatically
EREC G99

Larger generation & storage

Anything above the G98 threshold. Application and DNO approval are required before connection, this is the step that stalls sales.

  • Commercial solar, larger domestic, BESS
  • Full application pack with protection settings
EREC G100

Export limitation

Export Limitation Schemes cap how much a system can push to the grid, often the difference between an approval and a refusal on a constrained network.

  • Design export-limited to win approval
  • G100-aware screening & verdicts
Data sources

ENA & DNO published data

Screening runs on each network operator's own published capacity, constraint and heatmap data, cited in every verdict so you can show your working.

  • Sources named on-screen in each result
  • Calibrated per DNO before a network goes live
A note on G59. The older EREC G59 regime has been superseded by G99 for new connections. Headroom generates packs to the current G98/G99/G100 standards.
Data & authority

How we handle your data

Submitting as agent means handling installer and homeowner details. We treat that as the regulated activity it is.

1

UK GDPR

Site, installer and customer data is processed under UK GDPR, only for screening, pack generation and submission.

2

E-signed authority

Headroom only acts as agent under an explicit, e-signed Letter of Authority from the connecting customer.

3

Cited & auditable

Every verdict names its data source and timestamp, so the assessment behind a quote can always be shown.

Scope. Headroom prepares and submits applications to recognised standards. The final connection determination always rests with the Distribution Network Operator.

Standards-grade from screen to submission

See the cited verdict, generate a G98/G99 pack, and lodge it, to the standard the DNO expects.

Site Impact Calculator