New Zealand’s solar market operates under a unique regulatory framework. There is no national feed-in tariff, no federal residential subsidy, and building consent rules changed dramatically in October 2025. Instead, compliance revolves around the Electricity Authority’s Part 6 distributed generation rules, AS/NZS 4777 inverter standards, and individual Lines Company export policies. Installers who understand these layers can avoid permit rejections, costly reworks, and delayed grid connections.
This guide covers every compliance requirement for solar in New Zealand: grid connection rules, electrical standards, council permitting, Lines Company export limits, available incentives, and installer licensing. It is written for solar professionals who need actionable, current information.
Critical Compliance Point
From August 2026, all electricians installing grid-tied solar in New Zealand must hold a mains parallel generation endorsement on their EWRB practising licence. Installations completed by non-endorsed electricians after this date may fail inspection and be refused grid connection.
New Zealand Electricity Market Structure
New Zealand’s electricity sector is split into generation, transmission, distribution, and retail. For solar installers, the distribution layer matters most.
The Four Layers
| Layer | Role | Key Entities |
|---|---|---|
| Generation | Produce electricity | Contact, Meridian, Genesis, Mercury |
| Transmission | National grid | Transpower |
| Distribution | Local lines and poles | 29 Lines Companies (EDBs) |
| Retail | Sell electricity to customers | Contact, Meridian, Powershop, Octopus |
The Electricity Authority (EA) regulates the market and enforces the Electricity Industry Participation Code 2010. Part 6 of this Code governs how distributed generation connects to distribution networks.
Lines Companies (EDBs)
There are 29 electricity distribution businesses in New Zealand. Each sets its own technical requirements within the bounds of the Code. Major distributors include:
| Lines Company | Region | Export Limit (2026) |
|---|---|---|
| Vector | Auckland | 10 kW |
| Powerco | Waikato, Taranaki, Bay of Plenty, Wellington, Manawatu | 10 kW |
| Orion | Canterbury | 10 kW |
| Unison Networks | Hawke’s Bay, Rotorua, Taupo | 10 kW |
| Aurora Energy | Dunedin, Central Otago, Queenstown | 10 kW |
| NorthPower | Northland | 10 kW |
The default export limit increased from 5 kW to 10 kW in April 2026 under new EA rules. Distributors may still restrict exports below 10 kW where local transformers or voltage constraints exist.
Grid Connection Rules Under Part 6
Part 6 of the Electricity Industry Participation Code 2010 sets the legal framework for connecting distributed generation to New Zealand’s distribution networks.
Application Processes
The Code defines four connection processes based on system size:
| Process | System Size | Complexity |
|---|---|---|
| Part 1A | under 10 kW | Simplified (fast-track) |
| Process 1 | under 10 kW | Standard |
| Process 2 | 10 kW to 300 kW | Full technical assessment |
| Process 3 | 300 kW and above | Negotiated connection contract |
For residential solar, Part 1A is the relevant pathway. The distributor must process Part 1A applications within 10 business days. If the distributor does not respond, the application is deemed approved.
Part 1A Requirements
To qualify for the simplified Part 1A process, a system must meet these criteria:
- Total inverter capacity does not exceed 10 kW
- Single-phase inverter does not exceed 5 kVA (or phase imbalance does not exceed 5 kVA for multi-phase)
- All inverters comply with AS/NZS 4777.2:2020
- Both volt-var and volt-watt response modes are enabled
- Export power remains below the distributor’s threshold
If any criterion is not met, the installer must use Process 1 or higher, which involves a full network impact assessment.
Export Limits and Dynamic Export
From April 2026, the EA mandates a default 10 kW export limit for small-scale distributed generation. This applies where network conditions permit.
Lines companies may offer dynamic export limits that flex above or below 10 kW based on real-time network conditions. This is similar to models used in Australia and allows higher exports during periods of low network stress.
Vector’s modelling shows that accommodating unrestricted exports would require network investment of up to $4 billion in a high-uptake scenario. The 10 kW default balances solar growth with grid stability.
AS/NZS 4777: Inverter and Installation Standards
New Zealand shares the AS/NZS 4777 series with Australia. These standards govern how inverter energy systems connect to the grid.
AS/NZS 4777.2:2020 — Inverter Requirements
This standard specifies the performance and safety requirements for grid-connected inverters. All inverters sold in New Zealand must comply.
Key requirements include:
- Anti-islanding protection: Inverters must detect grid loss and disconnect within specified time limits. Both passive (voltage/frequency monitoring) and active (frequency drift or impedance detection) methods are required.
- Voltage protection: Overvoltage and undervoltage trip settings must align with distributor requirements.
- Frequency protection: Overfrequency and underfrequency disconnection within defined windows.
- Volt-watt response: Reduces active power export at high voltages to prevent local overvoltage.
- Volt-var response: Provides reactive power support for voltage regulation.
- Harmonic limits: Total harmonic distortion must stay within AS/NZS 61000 limits.
Voltage Setting Update (November 2025)
In November 2025, New Zealand adopted the Australia A Region voltage setting for the 10-minute average: 258V. This replaced the previous New Zealand-specific setting of 230V +6%.
Existing installations connected before 7 November 2025 are not required to update their settings but may do so voluntarily.
AS/NZS 4777.1:2024 — Installation Requirements
The 2024 update to the installation standard introduced several changes relevant to New Zealand installers:
- Inverter Power Sharing Devices (IPSD): Enables shared solar in multi-dwelling developments.
- Vehicle-to-Grid (V2G) provisions: Covers bidirectional EV charging equipment.
- Phase balance limits: 30 kVA single-phase limit, with 5 kVA imbalance for multi-phase systems up to 50 kVA.
- Interface protection: Replaced the central protection requirement for systems under 200 kVA.
The Electricity (Safety) Regulations are expected to cite AS/NZS 4777.1:2024 by the end of 2025, making compliance mandatory.
Building Consent Requirements
Building consent rules for solar changed significantly in 2025. Understanding what is exempt and what still requires approval saves time and money.
Exemptions Effective 23 October 2025
Most rooftop solar installations are now exempt from building consent under nationwide rules:
- Arrays up to 40 square metres per roof
- Wind zones up to “high” (under 158 km/h or 44 m/s)
- Typical residential systems of 25–30 square metres fall well within this limit
This exemption saves homeowners approximately $1,060 to $1,200 in consent fees per installation.
When Consent Is Still Required
| Scenario | Requirement |
|---|---|
| Panels function as roof cladding | Building consent required |
| Structural modifications to roof framing | Building consent required |
| Ground-mounted arrays over 20 m2 in urban areas | Council consultation or consent |
| Heritage or special character zones | Resource consent may be needed |
| Height-to-boundary restrictions affected | Council check required |
Electrical Compliance
Regardless of building consent status, all electrical work must comply with:
- AS/NZS 3000 (Wiring Rules)
- AS/NZS 5033 (PV array installation)
- AS/NZS 4777.1 (grid connection installation)
A Certificate of Compliance (CoC) must be issued by the installing electrician within 20 working days. An independent inspector must provide a Record of Inspection (RoI).
Solar Economics and Self-Consumption
New Zealand has no government-mandated feed-in tariff. Solar economics depend almost entirely on self-consumption.
Retailer Buy-Back Rates
| Retailer | Buy-Back Rate (c/kWh) | Notes |
|---|---|---|
| Octopus Energy NZ | 13c (up to 20c with peak plans) | Flexible time-of-use rates |
| Meridian Energy | 12c standard, 17c with 3-year plan | Fixed for systems under 10 kW |
| Powershop NZ | 13c flat | No contract lock-in |
| Contact Energy | 8c to 10c | Varies by plan |
Grid electricity purchase prices range from 26c to 35c per kWh. The gap between buy-back and purchase prices makes self-consumption the primary value driver.
Regional Solar Economics
EECA research based on almost 50,000 homes across four cities shows the following internal rates of return for a 5 kW north-facing system at 30 degrees tilt:
| City | IRR Range | Solar Resource Rank |
|---|---|---|
| Queenstown | 7% to 14% | Best |
| Auckland | 6% to 12% | Second best |
| Christchurch | 6% to 11% | Third |
| Wellington | Up to 10% | Lowest |
Appropriate battery storage can boost IRR by 1% to 2%, though batteries remain expensive for many households. Hot water diverters and timers offer lower-cost alternatives to improve self-consumption.
EECA Energy Efficiency Programmes
The Energy Efficiency and Conservation Authority (EECA) promotes renewable energy and efficiency but does not administer solar subsidies for residential customers.
Current EECA Programmes
| Programme | Focus | Eligibility |
|---|---|---|
| Warmer Kiwi Homes | Insulation and heating retrofits | Low-income homeowners |
| Community Renewable Energy Fund (CREF) | Solar PV and batteries for community buildings | Community organisations, marae |
| GIDI Fund | Industrial decarbonisation | Large energy users |
Budget 2025 Impact
EECA experienced significant funding reductions in Budget 2025. $53.6 million of baseline funding was returned across 2025/26 to 2028/29. Several programmes closed, including the Regional Energy Transition Accelerator (RETA), Sector Decarbonisation, and Crown Loans.
Commercial Solar Incentive
The one direct solar incentive available is for commercial systems:
- 20% instant tax deduction in the acquisition year
- Plus standard depreciation on the remaining 80%
- Applies to business solar installations only
Installer Licensing and SEANZ
Electrical work in New Zealand is strictly regulated. Solar installers must meet specific licensing requirements.
EWRB Registration
All grid-tied solar electrical work must be performed by an EWRB-registered electrician. Acceptable registration classes include:
- Electrician
- Electrical Inspector
- Electrical Engineer
- Electrical Installer
- Electrical Service Technician
Mains Parallel Generation Endorsement
A major regulatory change is the introduction of the mains parallel generation endorsement:
| Role | Effective Date |
|---|---|
| Electrical inspectors | As they re-register in 2025 |
| Installing electricians | August 2026 |
Electricians who held a practising licence before 4 August 2025 can obtain the endorsement through a transitional pathway by demonstrating experience with mains parallel generation installations.
SEANZ Membership
SEANZ (Sustainable Energy Association of New Zealand) is the industry body for solar professionals. Membership is voluntary but increasingly expected:
- SEANZ members must complete inspection checklists and provide equipment and workmanship warranties
- The Ministry of Education requires SEANZ membership for school solar installations
- Many suppliers and government clients prefer or require SEANZ-accredited installers
WorkSafe Requirements
All solar installations must be recorded on WorkSafe’s high-risk database. DIY solar installations are strongly discouraged and may void insurance coverage.
Off-Grid and Stand-Alone Systems
Off-grid solar operates outside the Part 6 grid connection rules but must still comply with electrical safety standards.
Applicable Standards
| Standard | Application |
|---|---|
| AS/NZS 4509 | Stand-alone power systems |
| AS/NZS 3000 | Wiring Rules (where applicable) |
| AS/NZS 5139 | Battery storage systems |
Off-grid systems do not require a distributed generation application or import/export metering. However, they must still be installed by a registered electrician and comply with AS/NZS 3000.
Net Metering and Billing
New Zealand does not have a uniform net metering policy. Billing arrangements vary by retailer.
How Billing Works
Most retailers offer a simple buy-back credit:
- Solar generation is used in the home first (self-consumption)
- Excess exports are recorded by the bi-directional meter
- The retailer credits the account at the buy-back rate
- Grid consumption is billed at the standard retail rate
Some retailers offer time-of-use plans with higher buy-back rates during peak periods. Octopus Energy, for example, offers up to 20c per kWh for exports during peak times on certain plans.
Maximising Returns
The most effective strategies for improving solar economics in New Zealand are:
- Shift load to daylight hours (dishwashers, washing machines, EV charging)
- Install a hot water diverter or timer
- Consider battery storage if buy-back rates are low and evening consumption is high
- Choose a retailer with competitive buy-back rates and review annually
Design Solar Systems That Meet NZ Standards First Time
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Common Compliance Mistakes in New Zealand
| Mistake | Why It Happens | Consequence |
|---|---|---|
| Applying for the wrong DG process | Installer assumes Part 1A without checking inverter size | Application rejected, timeline delayed by weeks |
| Using non-compliant inverter | Inverter lacks AS/NZS 4777.2 certification | Lines Company refuses connection |
| Missing mains parallel endorsement | Electrician not yet qualified under new rules | Inspection fails, CoC rejected |
| Ignoring local export limits | Installer assumes 10 kW applies everywhere | Distributor imposes lower limit after application |
| Forgetting council resource consent | Property in heritage zone | Enforcement action, possible removal order |
| Incorrect volt-watt settings | Inverter left at factory defaults | Voltage rise issues, neighbour complaints |
Frequently Asked Questions
Do I need building consent to install solar panels in New Zealand?
As of 23 October 2025, most rooftop solar installations under 40 square metres per roof no longer require building consent in New Zealand. This covers typical residential systems of 25–30 square metres. You still need consent if panels function as roof cladding, if structural modifications are made, or if the property is in a heritage or special character zone. Electrical work must always be done by an EWRB-registered electrician.
What is the solar export limit in New Zealand?
From April 2026, New Zealand lines companies must set a default export limit of 10 kW for residential rooftop solar where network conditions permit. This replaces the previous 5 kW standard used by most distributors. Lines companies may still set lower limits in areas with transformer or voltage constraints. Dynamic export limits, which flex based on real-time network conditions, are also being introduced.
Does New Zealand have a solar feed-in tariff?
No. New Zealand does not have a government-mandated feed-in tariff. Solar buy-back rates are set commercially by individual electricity retailers. Typical rates range from 8c to 17c per kWh depending on the retailer and plan. Grid electricity purchase prices are roughly 26c to 35c per kWh, so self-consumption delivers the best financial return.
What standards must solar inverters meet in New Zealand?
Grid-connected solar inverters in New Zealand must comply with AS/NZS 4777.2:2020 (with Amendments 1 and 2). They must provide anti-islanding protection, volt-watt and volt-var response modes, and overvoltage/undervoltage and overfrequency/underfrequency protection. From November 2025, New Zealand adopted the Australia A Region voltage setting of 258V for the 10-minute average. Inverters must also be tested by an IANZ-accredited or recognised laboratory.
Who can install solar panels in New Zealand?
All grid-tied solar electrical work must be performed by an EWRB-registered electrician. From August 2026, installing electricians must hold a mains parallel generation endorsement on their practising licence. Electrical inspectors must also hold this endorsement when they re-register in 2025. SEANZ membership is voluntary but increasingly expected for quality assurance.
Are there government subsidies for residential solar in New Zealand?
There are no direct government subsidies for residential solar in New Zealand. Commercial solar systems qualify for a 20% instant tax deduction in the acquisition year plus standard depreciation. The Community Renewable Energy Fund supports solar and battery systems on community buildings. The Labour Party proposed a $2,000 household rebate in 2024, but this was an election policy and has not been implemented.
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