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.

G98Up to 16A per phase
G99Above the G98 threshold
G100On constrained networks
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.

StandardAppliesWhat Headroom produces
EREC G98
Micro & small generation
Up to 16A per phaseTypical domestic solar & small battery
Notification pack generated automatically
EREC G99
Larger generation & storage
Above the G98 thresholdCommercial solar, larger domestic, BESS
Full application pack with protection settings
EREC G100
Export limitation
On constrained networksDesign export-limited to win approval
G100-aware screening & verdicts
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 The older EREC G59 regime has been superseded by G99 for new connections.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.
Where the numbers come from

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

Data & authority

How we handle your data

Generating an application pack 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 and pack generation. Headroom Technology Ltd is registered with the ICO under ZC221029. Our sub-processors and international transfers are named in the Privacy Policy.

2

Letter of Authority

The pack includes a Letter of Authority for the connecting customer to e-sign. Headroom does not act as agent and does not lodge applications: you submit through your DNO portal.

3

Cited & auditable

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

Scope. Headroom prepares submission-ready applications to recognised standards. You lodge them with your Distribution Network Operator, and the final connection determination always rests with the DNO.

Screen up to 10 domestic or commercial sites for free. Screen a site.