Upgrading integrated solar within an existing roof system
This project demonstrates how an integrated solar roof can evolve, improving performance and durability without altering the form of the home.
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The Chermside residential project was an upgrade to a high performance Volt solar roof, integrated seamlessly with the home’s existing Planum terracotta slate roof tiles. While the home previously utilised a solar tile system, the decision to upgrade to Volt was based on improved performance, greater durability and improved thermal performance.
The result is a refined, roof-integrated system that preserves architectural continuity while delivering significantly improved energy outcomes.
An overview of the solar, storage, and roofing components that make up the Chermside installation.
Solar System Information
25kW integrated Volt solar tile roof
Volt Solar Tiles Installed
218 x Volt Planum P3 115W Solar Tiles
Battery Storage and Inverter
4 × Tesla Powerwall 2 solar batteries and Fronius Symo 20kW solar inverter
Compatiable Roof Tiles
Planum terracotta (Slate)
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The brief
Upgrade the existing integrated solar tile system to a higher-performance solution that integrates with the home’s existing Planum roof tiles, improving long-term durability without impacting the roof’s architectural intent.
The solution
A Volt integrated solar roof using 218 Volt Planum solar tiles to provide a 25 kW system. The tiles install directly with the existing Planum roof tiles, utilise anodised aluminium framing to improve durability and thermal performance. The system integrates with a 20kW Fronius Symo inverter and three Tesla Powerwall 2 batteries.
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Anodised aluminium framing
Improved thermal performance
Long term durability and reduced degradation
Delivered as a coordinated roofing and solar installation, the system was commissioned for performance, accuracy, and long-term reliability.
Delivered as a coordinated roofing and solar project, Volt managed the integration of roofing and solar installation partners, providing technical oversight and installation support throughout.
The system was installed in stages, beginning with the removal of the existing solar tile system and surrounding roof tiles. The roof was then prepared with new sarking and tile battens to ensure precise alignment, followed by the installation of Volt solar tiles over two days.
Since coming online, the Volt system has delivered strong and reliable energy generation, consistently charging on-site batteries and supporting daytime household energy use, reducing reliance on the grid.
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“The Volt system is light years ahead of our previous system. From a performance perspective, in the first three weeks of the Volt system coming online, our electricity bill reduced by 70% and so far the system has continued to exceed our expectations on performance. Our solar batteries are being fully charged, the house is running on solar during the day while we export power to the grid. The tiles look great and integrate with the roof tiles, making it low profile and enhancing the home’s curb appeal.”
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