Important Update for Solar System Owners
The government has recently increased the allowable voltage range at your connection point (ICP) from 230V ±6% to 230V ±10%. This change came into effect on 13 November 2025 and will be fully implemented over the next year.

What does this mean for you?
If your inverter settings have not been updated to match the new voltage standards, when voltages are increased around the network, your solar system may begin to reduce its output. Voltages will start increasing from 18 May 2026. A six month period has been allowed for adjustments to inverter voltage responses to be undertaken.

What should you do?
Contact the company that installed your solar system, prior to 18 May 2026, and ask them to update your inverter settings to the latest recommended configuration (AS4777.2:2020 “Australia A” or updated “New Zealand” settings). This will ensure your system operates efficiently and avoids unnecessary reductions in your systems output.

Distributed Generation means using equipment for generating electricity at a home or 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 distributed generation include; solar (photovoltaic), wind, diesel generator, fossil fuel, hydro and battery.

Installing distributed generation can be complex and each situation is different. If you intend to purchase and install a distributed generation plant at your home or business, we recommend you involve us in the process as early as possible before you purchase the plant.

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.

Photos of Chia Sisters; New Zealand's first solar-powered juicery

Distributed generation must meet all relevant statutory and regulatory requirements and comply with all applicable safety standards. Network Tasman's policies and procedures for the application for, installation and connection of Distributed Generation are in accordance with the requirements of 

The Regulated Terms specified in Part 6 of the code will apply to the majority of distributed generation connections (once approved and completed). However, Network Tasman and the distributed generator may enter into a connection contract at any time and these contract terms shall take precedence. If contracted terms cannot be negotiated and agreed within 30 days following notice to Network Tasman of the intent to form a contract then the Regulated Terms shall apply. Any changes to contracted terms shall be by mutual agreement.

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.

At present, our network is accommodating distributed generation without congestion in most areas. There are some areas however that have reached their capacity for hosting solar generation.

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 any offers to their customers.

We will notify you if we think your distributed generation is likely to cause congestion.

If you are calling about an interruption to your power supply or a fault, please call
the toll free number (0800 508 100) for our 24hr Fault Response Line