175 Hay St

We're on the roof at 175 Hay Street in the Perth CBD — a 10-storey apartment building with a unique energy challenge. The building needed a solution to support common-area loads including the lift and pool equipment, while working with an existing SolarEdge solar installation.

​

What we installed

We delivered a full battery stack with 48kWh of storage (6 × 8kWh modules) and a 15kW inverter. The system is AC-coupled to the building's existing SolarEdge solar installation, allowing the site to capture more value from onsite generation and store energy for when the building needs it.

​

This is one of the first installations of its kind — equipment cantilevered 10 storeys off the ground on a CBD rooftop. That means the project isn't just about energy; it's also about safe installation, structural engineering, and getting the approvals right. We secured building permit approval from the City of Perth and the client is really stoked with the outcome.

​

Outcome

The installation now supports common-area loads (including the lift and pool equipment), helping reduce costs for the strata and improving resilience for shared services.

​

Next phase

Now that the common-area system is in place, we're looking at adding solar, batteries and EV charging into the downstairs car park. The goal is simple: significantly reduce resident bills through onsite generation and storage — and build a scalable EV charging pathway as demand grows.

​

Can we do this on other buildings?

​

Yes. We can add solar and batteries to pretty much any building, anywhere — including the structural engineering and compliance work required to install equipment safely and meet local approvals.