Network Waitaki solar export limits and connection approval explained

Are you on Network Waitaki or Alpine Energy?

Network Waitaki is the lines company for Oamaru and the Waitaki district. It is owned by the Waitaki Power Trust and says it serves about 13,000 connections over 1,800 km of lines. Its own reports name Oamaru, Hampden, the Waitaki Plains, Kurow, Otematata and Omarama, and describe its line to Ōhau as near the outer edge of the network.

The boundary to watch is with Alpine Energy, which supplies South Canterbury, including the Waimate and Mackenzie districts and Twizel. Alpine lists the Glenavy huts, on the Canterbury side of the Waitaki River mouth, among its own export-congested areas, so an address near the river or in the upper Waitaki can sit on either network. The two have different fees, timeframes and export payments, so do not let a quote mix them up.

The simple check is the 15-character ICP number on your power bill. Ask your retailer which lines company it belongs to, or call Network Waitaki on 03 433 0065. Our Canterbury lines company table shows the four Canterbury networks.

Keep the three roles apart. Network Waitaki approves the connection and sets the export limit. Your retailer arranges import/export metering and sets the price you are paid for exported power. Your installer designs the system and usually handles the application.

Solar is less common here than on any of the four Canterbury networks. Electricity Authority EMI figures for 31 August 2026 show 379 homes with solar in the Waitaki network area, 3.6% of residential connections, against 4.2% nationally. That ranks 27th of the 38 local network areas in our regional solar uptake rankings. The number rose 20% in a year, and the systems are large: they average 6.8 kW, the second-highest of the 38 areas after the West Coast and well above the national average of 5.8 kW.

The 10 kW limit

Network Waitaki’s connecting generation or batteries page says homeowners can apply to connect systems of up to 10 kW on a single-phase supply, subject to approval. Larger systems may connect on a three-phase supply, depending on safety, technical requirements and network capacity.

Its small-scale connection standard, version 2.1 issued on 15 July 2026, sets the default maximum export at 10 kW per connection. The standard records that the single-phase limit was raised from 5 kW to 10 kW in an earlier revision. Nationally, the Electricity Authority’s 2026 Code changes made 10 kW the default for eligible small home systems on the streamlined route. Network Waitaki can still set a different limit for a particular connection after its own assessment, so the figure that counts is the one in your approval.

An export limit is measured in kilowatts, which is power at one moment. It is not a daily allowance in kilowatt-hours. You only reach a 10 kW limit when the panels make more than 10 kW beyond what the house is using at that moment, which a typical home system rarely does. Our system sizing guide explains how panel size, inverter size and export fit together.

Approval applies to batteries too. Network Waitaki’s page covers solar, small wind and hydro, home batteries and electric vehicles that can send power back to the grid, and says each needs approval before it is connected. Adding a battery to an existing system is a change that needs an application.

No known congestion, for now

Network Waitaki says no specific locations on its low-voltage network are known, or reasonably expected, to face export congestion in the next 12 months. That is a clear contrast with its neighbours. Alpine Energy names 11 congested areas in South Canterbury, and EA Networks lists congested areas across Mid Canterbury.

That statement is not a guarantee for every address. The standard says that if there is not enough capacity at a connection, Network Waitaki can approve a lower export limit or decline the application, and may ask the applicant to pay for network upgrades. Its hosting capacity map covers only the 11 kV high-voltage network and is meant for large generators, not for rooftop solar, so it will not tell you anything about your street.

The practical step is the same as anywhere: do not accept a savings forecast that relies on exporting 10 kW until the application has been approved at that limit.

From application to switching on

Applications go through the online form on Network Waitaki’s Get Connected page. The company says it then contacts the applicant to guide them through the process. Its small-scale standard sets out two routes for systems up to 10 kW:

The clock runs from a complete application, so ask your installer which route they used and the date it was accepted. Wait for written approval before the system is switched on.

Before final approval, Network Waitaki asks for the electrician’s certificate of compliance, a record of inspection where one is required, evidence of the inverter settings and the test or commissioning records. It may also inspect the installation on site, and asks for at least 5 business days’ notice by phone. Its Electrical Services team, on 03 433 0065, keeps a list of approved inspectors who can inspect generation before it is connected.

Metering is the retailer’s job. The standard says metering of the exported power is organised by the retailer for the connection, and Network Waitaki’s pricing methodology says small generators need a meter that records both import and export. Ask your retailer early what the meter change costs and how long it takes.

Fees, and how they compare

Network Waitaki publishes its generation fees including GST:

The streamlined route applies when the inverter complies with AS/NZS 4777.2:2020 and the system meets the small-scale standard. For comparison, here is what the same small home application costs on the networks we cover in Canterbury:

The fees are small next to the price of a system, but ask the installer whether the quote includes them and the $90 inspection fee, or whether they will be passed on. Our solar panel cost guide covers what else should be in the price.

Inverter settings Network Waitaki asks for

The inverter must be on the Clean Energy Council’s approved list, or come with a certificate showing it complies with AS/NZS 4777.2:2020. Ask for the exact inverter model on the quote so it can be checked.

The settings matter as much as the model. Network Waitaki’s standard asks for the inverter to be set to the “Australia A” settings in AS/NZS 4777.2:2020, with both volt-watt and volt-var response switched on, and New Zealand settings for frequency protection. In plain terms, the inverter turns its output down or adjusts it automatically when the local voltage rises too high. On a sunny day with a light load in the street, that can trim a little export, but it is what allows many homes on the same line to export safely.

Once the system is approved, the settings must stay as approved. The standard says the owner must keep the inverter settings correct and unaltered, and that Network Waitaki may check them. Do not let anyone change the export setting without a new approval.

A grid-connected inverter switches off when the network goes down, so solar alone will not keep the lights on in an outage. Our battery storage guide explains what backup needs.

What your exports earn

The price you are paid for exported power is set by your retailer. Network Waitaki lists 19 retailers on its network, including the large ones and smaller retailers such as Electric Kiwi, Octopus Energy and Community Power. Check which of them offer a buy-back plan you like before you switch. Our buy-back rate guide compares the plans.

What Network Waitaki does not offer is a lines-company credit for exporting at busy times. Its pricing methodology for 1 April 2026 to 31 March 2027 introduces a negative price for exports from small generators, but sets it at 0 cents a kWh for the year. It says the network benefit would be less than 1 cent a kWh and the payments would total around $10,000 a year across the network, because the investment exports could defer is already committed. It says the price will be reviewed.

That differs from the other side of the river. Alpine Energy pays a 3 cent a kWh credit for eligible exports in the morning and evening peaks, and Orion has a winter peak export credit. Do not include either in a forecast for a Network Waitaki address. A battery that exports in the evening earns only the retailer’s rate here, which makes it more important to judge it on what it saves the house; our battery or no battery guide shows how.

Six things to get in writing

Use these alongside our guide to common solar quote mistakes when comparing installers.

• The connection: the ICP, confirmation that it is on Network Waitaki and not Alpine Energy, and whether the supply is single-phase or three-phase.
• The route: whether the application will go on the streamlined Part 1A route or Part 1, and the date it was lodged.
• The export assumption: the limit the savings forecast uses, and that it matches the limit in Network Waitaki’s approval.
• The equipment: panel capacity, and the exact inverter model and rating, with confirmation it will be set to Network Waitaki’s required settings.
• The fees: the application and inspection fees and the retailer’s meter charge, and who pays each.
• The paperwork: who lodges the application, who tells the retailer, and who sends Network Waitaki the certificate of compliance, inspection record and commissioning records.