G98 is the DNO notification process for small-scale generation systems up to 16A per phase (3.68kW single-phase), allowing 'fit and inform' installation without pre-approval.
G98 is the Engineering Recommendation developed by the Energy Networks Association (ENA) that governs the connection of small-scale generation equipment to UK distribution networks. It applies to systems with inverters rated up to 16A per phase.
| Connection Type | Maximum Capacity |
|---|---|
| Single-phase | 3.68 kW |
| Three-phase | 11.04 kW |
The key difference is in the approval process:
G98 is suitable for:
If your system exceeds G98 thresholds, you'll need a G99 application instead.
G99 is the engineering recommendation governing the connection of generation equipment to distribution networks, requiring DNO approval for systems over 16A per phase.
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