A luxurious estate in Red Hill

22.4 kilowatts across three roof faces, and two Tesla Powerwalls in the garage.

A large two-storey house seen from the air behind it, with dark solar panels laid across three separate faces of a grey metal roof, a blue lap pool and a courtyard between the wings, a clipped hedge along the boundary and a grass tennis court in the foreground under the shadows of tall gum trees

System specifications

Solar: 22.4 kW
Supply: Three-phase
Battery: Tesla Powerwall 2 × 2
Battery capacity: 27 kWh

A roof with several faces, and three phases under it

A roof like this one is not a single plane, and that is what lets an array this size go on without any of it pointing the wrong way. The panels are laid across three separate faces in three separate runs. That is more setting out and more roof penetrations than a single plane. It is also the reason the whole 22.4 kW earns its keep, instead of half of it sitting in shade by mid-afternoon.

Three-phase power decides the rest of the design before anything reaches the roof. It sets what the inverter has to be, how the battery ties into the board, and which circuits are still live when the street goes off. It is the first thing worth establishing about a site this size and the thing most quotes skip.

A rendered two-storey house photographed from above the front garden, with a balcony across the upper floor, two dark garage doors at ground level, clipped hedges and a lawn in front of it, a maple in autumn colour beside the drive and open hillside behind

Two Powerwalls, the gateway beside them, and a bollard in front

Two Tesla Powerwalls sit side by side on a garage wall with the gateway on the same wall to their right. Two units is 27 kWh, because every Powerwall sold here is 13.5. Indoors on a rendered wall is the easy version of this job: no weather, a short run back to the board, and a surface that takes the weight without a frame.

The yellow bollard in front of them is not decoration. It is a garage, cars reverse into it, and anything at bumper height gets protected. The gateway is the part that does what people actually want a battery for. It watches the street, and when the street stops it opens the connection and runs the house off what is stored instead. Nobody in the house does anything.

How the Powerwall works

Two white Tesla-badged wall units mounted side by side on the rendered back wall of a garage, a grey switchboard enclosure on the same wall to their right, a short yellow bollard bolted to the floor in front of the right-hand unit, and the edge of a sectional garage door at the right of the frame

The front of a large white two-storey house at dusk, lit from inside and out, with a stone fountain in a circular pond on the lawn in front of it, a flight of steps up to a columned entrance, clipped hedges either side and a tree in leaf overhanging the frame

A paved courtyard enclosed by white rendered walls, with tall black-framed glazed doors standing open onto a hall and a staircase, a white timber pergola overhead carrying a climbing vine, and a narrow water channel in the paving in the foreground

A swimming pool at dusk with a rounded end, an open-sided pavilion with a flat roof and lounge seating under it standing behind the water, a coursed sandstone wall and clipped hedge along the boundary and a gum tree against a pink sky

How we work

It runs from the bill you send us to the day your system is switched on.

Before the visit
Send us two bills, one from summer and one from winter, and tell us roughly when your house is busy. Your own numbers are where the design starts.
Site visit or phone consultation
One of our energy geeks goes through the roof, the switchboard and the meter with you, at the house or over the phone. What goes where, what the roof can carry and whether the board has room all get settled here.
Customised design
A Sunstak engineer designs the system in house. You get back a drawing of your own house with the equipment set out on it, and what decided where each piece went.
Quote approval
Your quote lists every item with its model number, and the exclusions as plainly as the inclusions. There is nothing to sign on the day, and nothing is ordered until you approve it.
Installation
We tell you up front what gets switched off on the day, and for how long.
Post-installation support
Nobody leaves until the system is commissioned and the monitoring is running on your phone. After that, service and warranty go through the same office that did the install.

Dark solar panels laid across three separate faces of a grey metal roof, seen from the air, with a blue lap pool and a courtyard between the wings of the house below

Every installation backed by the Sunstak guarantee

Sunstak master installers
Our master installers have completed at least 100 installations with 5/5 star reviews.
Installation with no surprises
We confirm the scope, price and installation plan. You'll know exactly what's included, what happens next and what to expect on the day, with no last-minute variations or surprises.
Roof leak guarantee
If your roof leaks after our installation, we pay you $500 cash and fix it immediately.
Stock guarantee
If the product on your design cannot be supplied, the replacement is an upgrade and the price does not move.

Photographs and system figures from the sale listing of 52 Mugga Way, Red Hill — Blackshaw Manuka, sold 17 November 2025. All credits to the agency and Team Sanfrancesco, and thanks to Peter Blackshaw.

All recent work