Power and Water’s inverter-based solar energy system specification divides systems into 4 types of connections - basic, negotiated, large embedded generation and transmission connections. This applies to all systems, both residential and commercial customers.

All inverter-based solar energy system installers (including battery installers) are required to hold current Northern Territory electrical licenses, as well as current design and installation accreditation and endorsements with the Clean Energy Council. All equipment must be on the CEC approved equipment list.

Inverter based solar energy system class type comparison summary

Connection typeEligibility Site export limit Darwin, Katherine, Alice Springs and Tennant Creek1 2 Assessment response timeline Assessment fee
Basic Micro Embedded Generation Pre-approved ≤5kW single phase or ≤ 7kW three phase ≤10kVA single phase
or
≤ 30kVA three phase
Pre-approved No
Negotiated Embedded Generation Requires assessment As determined by assessment

≤ 2000kVA three phase via LV Connection

Subject to NTC Small Generating System Limits

65 business days (best endeavours) Yes
Large/Transmission
Connection
Requires assessment As determined by assessment >2000kVA three phase or via HV Connection By negotiation By negotiation

Power and Water specify the use of AS4777 2020 Region A settings for solar inverters.

1 One hour continuous inverter output (AC) rating in kVA. Sum of all inverters must not exceed limit.

2 For connections to other parts of the network (e.g. remote networks and minor centres) please contact Power and Water as customised requirements will apply.

Technical specifications

Basic Micro Embedded Generation Technical Specifications (< 30kVA) - last updated June 2023

This Basic Micro Embedded Generation Technical Requirements Specification document provides proponents of basic micro embedded generation (EG) connections information about their obligations for connection to and interfacing with the Power and Water Corporation (Power and Water) network.

Negotiated Embedded Generation Technical Specifications (30kVA-2000kVA) - last updated December 2023

This technical requirements document provides proponents of negotiated embedded generation (EG) connections information about their obligations for connection to and interfacing with the Power and Water Corporation (Power and Water) network.