Expected ROI of off grid battery system project in New Zealand 2025

Will New Zealand's first grid-scale battery come to Glenbrook?

Fifty-six battery units begin arriving for Auckland’s first grid-scale battery at Glenbrook. New battery energy storage system (BESS) will discharge energy at a split second to significantly improve security of energy supply to New Zealanders.

Why should New Zealand invest in grid-scale batteries?

Additionally, these batteries, alongside more renewable generation, will help off-set the retirement of thermal generation and support New Zealand’s transition to a low-emissions economy. The first grid-scale battery was commissioned in 2023 by Hamilton lines company WEL Networks.

How do grid-scale batteries work?

The size of the battery is 35MW (35MWh), which is enough to meet the daily demand for 2,000 homes. Grid-scale batteries work by buying electricity, storing it and then selling it back. The battery operators use half-hourly electricity spot prices to decide how they will buy, store and sell electricity.

What is a grid scale battery?

However, renewable generation (like wind and solar) vary with the weather, so renewable electricity supply may not match up with demand. Grid scale batteries soak up excess renewable electricity, and then release it back to the grid when needed. Some batteries also provide extra services like reserves.

When was the first grid-scale battery commissioned?

The first grid-scale battery was commissioned in 2023 by Hamilton lines company WEL Networks. It is located near Huntly power station and began charging and discharging into the grid in 2024. The size of the battery is 35MW (35MWh), which is enough to meet the daily demand for 2,000 homes.