Installing and connecting distributed generation to Network Tasman’s electricity network
Distributed Generation means using equipment for generating electricity at a home or a business which is connected to an electricity distribution network (i.e. Network Tasman’s electricity network) that is capable of injecting electricity back into that network. Examples of this could include; solar (photovoltaic), wind, diesel generator, hydro, battery.
If you intend to purchase and install a distributed generation plant at your home or business you will need to involve us in the process as early as possible before you purchase the plant.
It is important you familiarise yourself with all the information and downloads on this page. Please take the time to read this material thoroughly and then notify us of your intentions.
There are a number of regulations that apply to distributed generation. It is important that you are fully aware of what is required before you invest in any plant.
Regulated TermsPart 6 of the Electricity Industry Participation Code 2010 (the Code) contains regulated terms for the connection of distributed generation. In general we use these terms, however we are prepared to discuss alternative terms where they may provide mutual benefits. A copy of the regulated terms is contained in Schedule 6.2 of the Code. This can be found here.
New forms of distributed generation, such as solar power, reduce the amount of electrical energy required from the network. With the continued growth in distributed generation, significant amounts of energy can be exported into the network particularly in the summer when people may be at work or away from home.
Our network is engineered so that electricity flows in one direction. The growth in the amount of exported energy has the potential to create reverse power flows and congestion on our networks. One possible consequence of this is higher than standard voltage, which can damage customers’ appliances and equipment. To limit the effect of this, all inverters are required to have an overvoltage shutdown facility and this is currently to be set at 246V.
We manage network congestion by looking at new distributed generation connections on a case by case basis and by referring to our database of existing distributed generation installations and our network capacity.
It is important that you complete the Network Tasman application process before you make any financial commitments to distributed generation projects.
Your application approval will depend on the nature of the network congestion, the distributed generation operational characteristics and the business model of the proposal. We will notify you if we think your distributed generation is likely to cause congestion.
Export Congestion on our Network
At present our network is accommodating distributed generation without congestion in most areas. There are two areas however that have reached their capacity for hosting solar generation. These areas cover:
- Installations supplied from Substation MR35. These sites are located in Redwoods Valley Road between and including numbers 320 to 337 and number 343; and
- Installations supplied from Substation EQ77. These sites are located in Kilkenny Place, Wakefield, between and including numbers 128 and 148.
- Installations supplied from Substation GB878. These are sites located in Onekaka Iron Works Road between and including numbers 14 and 40.
- Installations supplied from Circuit 10 Substation W123. These are sites located in Koura Road between and including numbers 1 and 18.
No further distributed generation can be accommodated in these areas without export to grid restrictions or network upgrades. Installers considering adding solar generation in these areas should contact Network Tasman before making offers to their customers.
Application Administration Fees
All applications for distributed generation to be connected to the Network Tasman distribution network, will incur administration fees pursuant to Part 6 of the Electricity Industry Participation Code 2010.
Network Development Levy
If the proposed generation is likely to lead to future network congestion, the generator may be required to pay a Network Development Levy to contribute to the cost of network reinforcements.
In some instances, events on Transpower’s national transmission grid may restrict distributed generation.
Network Tasman’s policies and procedures for the application, installation and connection of Distributed Generation are designed to comply with Part 6 of the Electricity Industry Participation Code 2010 which can be found at www.ea.govt.nz.
Please read through the relevant documents below, and call Network Tasman on (03) 989 3600 or email firstname.lastname@example.org if you have any queries.
Conditions for connection of distributed generation to our Network
The following information specifies the conditions for connection of all distributed generation plant to Network Tasman’s distribution network.
Distributed generation with capacity of 10 kilowatts or less (≤10kW)
The following information applies to customers planning to generate their own electricity onsite via a small-scale generator (10 kilowatts or less) which is, or can be, connected to Network Tasman’s electricity network. Distributed Generation (≤10kW) Information (click on the buttons).
Click below for a pre-approved list of inverters.
Distributed generation with capacity greater than 10 kilowatts (>10kW)
The following information applies to customers planning to generate their own electricity onsite via a small-scale generator (10 kilowatts or more) which is, or can be, connected to Network Tasman’s electricity network. Distributed Generation (>10kW) Information (click on the buttons).