G98 vs G99 DNO Applications: What Your Business Needs to Know

Understanding DNO Applications

Any solar installation that connects to the grid requires notification or approval from the Distribution Network Operator (DNO). The application type depends on your system size and connection arrangement.

G98 vs G99: Quick Reference

Criteria	G98	G99
System size (single phase)	Up to 3.68kW	Over 3.68kW
System size (three phase)	Up to 11.04kW	Over 11.04kW
Application type	Notification only	Full application
Timeline	Immediate	6-12 weeks
Cost	Free	Variable (may have fees)

G98 (Small Systems)

G98 applies to most domestic and small commercial systems. Key points:

• Simple notification process
• No DNO approval required
• Installation can proceed immediately after notification
• Rarely applies to commercial installations due to size limits

G99 (Larger Systems)

G99 applies to most commercial installations. The process involves:

1. Submit application to DNO with system details
2. DNO assesses grid capacity (20 working days)
3. Receive connection offer or modification request
4. Accept offer and pay any connection fees
5. Installation can proceed after acceptance

Grid Constraints

In some areas, grid capacity may be limited. Possible outcomes:

• Unconditional offer: Connect as planned
• Conditional offer: Export limiting required
• Grid reinforcement: Upgrades needed (additional cost)

We Handle Everything

We manage the entire DNO application process, including:

• Determining appropriate application type
• Preparing technical documentation
• Submitting applications
• Managing DNO communications
• Coordinating connection arrangements