Solar / Distributed Generation
Distributed Generation (DG) refers to private electricity generation, such as solar panels or small wind turbines, that can produce electricity on your property and export any excess back into the national electricity network.
Many customers install solar panels to reduce the amount of electricity they need to purchase from a retailer. When a DG system is connected to Unison’s network, any surplus electricity you generate can also be sold back to your retailer, and you can receive credits on your power bill for the energy you export.
If you want to connect any DG, you need to let us know so we can ensure it’s safely connected to our network.
How Distributed Generation Works at Unison
Unison manages DG connections in line with Part 6 of the Electricity Industry Participation Code 2010 (the Code). Distributed Generation is grouped into two connection categories, each with their own technical requirements:
- Systems 10 kW or less (typically residential)
- Systems above 10 kW (typically commercial or industrial)
Export Limit for Single-Phase Solar
From November 2025 Unison has increased the maximum export limit for single-phase distributed generation installations that may apply to connect through Unison’s fast track DG1 process from 5 kW to 10 kW. This change makes it simpler and faster for customers wanting to connect larger DG installations.
To connect through the fast track DG1 process at this higher limit:
- Your inverter must comply with AS/NZS 4777 part 1 and part 2, ensuring it meets all operational, performance, and protection requirements for safe connection to Unison’s network.
- While export of up to 10 kW is permitted for single-phase configurations, the actual amount able to be exported at any given time will always depend on the available capacity of the local distribution network. If the network cannot safely accommodate a 10 kW export level at that time, the amount able to be exported may be reduced to match its capacity at the time.
- The power quality modes (Volt/Watt and Volt/Var) as per ASNZS4777.2 must be enabled with profiles as specified in the Unison's connection standard.
This approach ensures we maximise opportunities for customers while maintaining the safety, reliability, and performance of the network for everyone.