Project Overview

Tesla Powerwall NZ installations at development scale require a level of coordination that goes well beyond a single home installation. At Te Arai Link, Future Energy delivered exactly that: 13 Tesla Powerwall units across 13 new build coastal cottages, commissioned to align with the builder’s handover schedule and solar pre-wired on every lot so that homeowners can expand into a full residential solar power system without any additional electrical work.

Te Arai is a coastal location in Northland where grid reliability matters. Every home on this development can now run through a grid outage independently, backed by 13.5kWh of Tesla Powerwall NZ storage per home and 175.5kWh of total battery capacity across the site. It is the kind of infrastructure that transforms a new build from a standard home into something genuinely future ready.

The Challenge

The developer at Te Arai Link had a clear brief: every cottage needed to be energy independent from day one, and every home needed to be ready for solar without requiring owners to retrofit electrical infrastructure later. With 13 homes across a single coastal development, the installation needed to be coordinated as a single programme rather than 13 separate jobs. Timing was critical. The system had to be commissioned and ready to hand over in line with the builder’s schedule, with no delays to settlement.

Being a coastal Northland location, Te Arai is also prone to the kind of grid outages that come with exposure to weather events. Providing genuine backup power capability across every home was not optional. It was the foundation of the brief.

The Solution

13 x Tesla Powerwall NZ Across Every Home

Tesla Powerwall NZ is the benchmark home battery for a reason. Each unit provides 13.5kWh of usable storage, up to 10kW of continuous power output during a grid outage, and seamless switchover when the grid goes down. Across 13 homes, the development carries 175.5kWh of total battery capacity. Each Powerwall is managed through the Tesla app, giving homeowners real time visibility of their battery state, grid status, and energy use from day one.

Grid off peak charging was configured across all units, meaning each battery charges from the grid during the cheapest overnight rate periods and draws from storage during peak pricing hours. When solar is added in future, the Powerwall switches automatically to prioritise solar charging before drawing from the grid at all.

Solar Pre Wiring Across All 13 Lots

Every cottage was solar pre wired during construction, meaning the electrical infrastructure needed to add a residential solar power system is already in place. Homeowners who choose to add solar panels and expand their Tesla Powerwall NZ setup in future will not need to revisit the switchboard or run new cabling. The marginal cost of doing this at build stage versus retrofitting later is significant. Future Energy built it in from the start.

Coordinated Development Delivery

Delivering 13 Tesla Powerwall NZ installations as a single coordinated programme meant working directly with the builder across the construction timeline. Installations were sequenced to align with build stage completions across the site, ensuring each home was commissioned and ready for handover without impacting the overall settlement schedule. For the developer, this meant a single point of contact and a consistent outcome across every lot.

Outcomes

• 13 x Tesla Powerwall NZ units installed across all 13 coastal cottages
• 175.5kWh total home battery capacity across the Te Arai Link development
• 25.8 tonnes of CO2 offset per year as the development transitions to clean energy
• Every home capable of running independently through a grid outage
• Solar pre-wiring installed on every lot with no additional electrical work required to add panels
• Grid off peak charging configured across all units from commissioning
• Delivered in full coordination with the builder’s handover schedule
• 15% reduction in total site energy consumption with further reductions expected as homeowners add solar

Frequently Asked Questions

Can Tesla Powerwall NZ be installed across a whole development at once?

Yes and it is often the most cost effective way to do it. Delivering Tesla Powerwall NZ as a coordinated development programme means consistent specification, sequenced installation, and a single point of accountability across every home. It also allows the developer to offer a meaningful point of difference at the time of sale. Every homeowner at Te Arai Link received a home battery and solar ready infrastructure as part of their purchase. That is a genuinely compelling feature in a coastal location where grid reliability is a known consideration.

What happens to the Tesla Powerwall NZ when the grid goes down?

The Tesla Powerwall detects a grid outage and switches to backup mode in a fraction of a second. Most homeowners will not notice the transition. The battery then powers the home from stored energy for as long as its charge allows. At 13.5kWh per unit and typical household consumption, a single Powerwall will run a home through the night and into the following day. If the home also has solar panels, generation during the outage recharges the battery automatically, extending backup duration indefinitely in good conditions.

Why install solar pre-wiring if homeowners are not adding solar straight away?

Because retrofitting it later costs significantly more. Running conduit, updating switchboards, and installing the necessary infrastructure at build stage adds relatively little to the construction cost. Doing the same work after the home is finished means reopening walls, re-running cables, and potentially disrupting finished interiors. Future Energy installed the solar pre wiring across all 13 Te Arai Link cottages during construction so that when any homeowner is ready to add a residential solar power system, the only cost is the panels and inverter themselves.

How does the Tesla app work for homeowners?

The Tesla app gives each homeowner a real time view of their home battery state, grid status, and energy flows. They can set the Powerwall to prioritise self consumption, backup reserve, or time of use savings depending on their goals. Off peak grid charging is configured automatically to draw from the grid at the cheapest overnight rate and use stored energy during peak pricing periods. When solar is added, the app manages the full system including solar generation, battery charging, and grid interaction from a single interface.

Planning a new development and want to offer Tesla Powerwall NZ on every home? Future Energy works directly with developers and builders to deliver home battery and solar ready infrastructure at scale. Talk to us about what a coordinated programme looks like for your next project.