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 type||Eligibility||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 |
≤ 30kVA three phase
|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 |
|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.