What is G98? Connect & Notify Registration
G98 is the specific industry standard governing the connection of micro-generators in the United Kingdom. Unlike commercial solar installations, an 800W balcony kit fits into the micro-generation exemption, which permits consumer self-installation. Under these rules, you do not require advance grid permission to connect; instead, you submit the official G98 commissioning document afterwards.
Regulatory compliance: The 28-Day Deadline
Submitting your G98 documentation within 28 days of initial commissioning is a standard grid requirement. Failure to notify constitutes a breach of the national Distribution Code, which could complicate property transactions, smart meter export arrangements, or home insurance coverage.
Step 1: Obtain Your Type Test Certificates
You cannot submit a G98 notification without matching Type Test Certification for your inverter. This engineering certificate certifies that the micro-inverter (e.g., Hoymiles, EcoFlow, or Anker) is equipped with anti-islanding protection, meaning it shuts down within milliseconds of a power failure to prevent current backfeeding into the grid.
- Ensure your retail kit includes standard UK G98 compliance certificates.
- Keep the PDF copies downloaded for your records, as DNO portaling systems require uploading them.
Step 2: Identify your DNO (UK Power Grid Operator)
Your Distribution Network Operator (DNO) operates the physical cabling in your region. They are completely separate companies from your utility bill provider (e.g., Octopus, British Gas, or E.ON). Find your designated DNO below:
UK DNO Network Lookup Tool
Enter your postcode below to immediately identify your local electricity network operator, find direct G98 application portals, contact emails, and user-reported processing timelines.
Or select your region network manually:
Step 3: Complete and Submit the Form
Standard G98 notification forms require direct hardware definitions. You will typically need:
- System Address: The primary residence where the kit generates power.
- Inverter Model & Serial Number: Standard identifiers derived from your physical inverter casing.
- Commissioning Date: The official date the kit was first connected to your home circuit.
Grid Capacity Accountability
While plug-and-play kits represent very low micro-generation capacities, electricity network operators use G98 registration data to prevent power quality spikes and grid imbalance. Active G98 registration is also a required legal step before you can establish utility Smart Export Guarantee (SEG) tariffs to receive payouts for excess energy backfed into the grid.
Open ENA Microgeneration Hub