Imagine a world where buildings not only provide shelter but also generate their own energy and water. This vision comes to life through the innovative proposal known as the Fiji Living System, which employs kinetic concave mirrors to achieve complete autonomy in energy and water resources.
An Architectural Revolution: Merging Energy and Water Systems
Crafted by MASK Architects, this groundbreaking design introduces a unique framework where architecture seamlessly integrates with essential utilities like energy and water. Instead of viewing these elements as isolated systems, the Fiji Living System presents the building itself as an adaptive interface that both generates necessary resources and creates livable spaces. Central to this design is a dual-axis concave parabolic mirror installed atop each module. This mirror intelligently tracks the sun in real-time, enabling it to concentrate solar energy while also providing vital support for shading, ventilation, and the regulation of microclimates in the areas below.
Dubbed the Fiji Solar Crown, this system redefines living architecture by incorporating a dynamic concave mirror into its fundamental structural and spatial components. In collaboration with TesserianTech, specialists in engineering and kinetic mirror technology, the project seeks to tackle pressing issues faced by Fiji, such as energy instability, dependence on imported diesel, freshwater shortages, saltwater intrusion, and the escalating impacts of climate change. By functioning independently of centralized power grids, these architectural units are designed to autonomously produce electricity and collect water directly from their surroundings.
All images courtesy of MASK Architects.
The Solar Crown: A Multifaceted Environmental and Spatial Solution
The architectural design draws inspiration from the traditional Fijian bure, creatively reinterpreting its raised structures, principles of passive ventilation, and iconic roof apex using modern materials and technologies. The concave solar crown acts as an environmental powerhouse. It not only captures sunlight for electricity generation but also redirects excess heat to enhance passive cooling, powers lighting during nighttime, and collects rainwater—this water is stored within the building's core for various uses, including drinking and irrigation.
Within this innovative structure, the spatial layout is organized vertically. The ground level serves as a shaded, naturally ventilated area, while the main living space offers breathtaking panoramic views along with essential services. An upper observation deck frames the sky and landscape, reinforcing the vertical relationship between the living areas and the surrounding environmental systems.
The talented design team at MASK Architects envisions this system as a collection of three modular scales, each defined by its own concave solar crown. The smallest 3-meter diameter module operates as a compact generator of energy and water, making it ideal for rural settings, agricultural applications, and small off-grid shelters. The medium-sized 5-meter module caters to community needs, featuring outdoor classrooms, gathering spaces, and small tourism facilities. Lastly, the largest 7-meter module is designed as a fully habitable multi-level residence or accommodation unit, adaptable to elevated or floating foundations as a response to rising sea levels. These modules can function independently or be grouped together to create larger communities, micro-grids, or interconnected networks.
Harnessing Energy, Water, and Materials Across Different Scales
Energy production is a key aspect of this system’s performance. Under optimal solar conditions in Fiji, the 3-meter mirror can yield around 12 kWh per day, while the 5-meter version generates approximately 30 kWh daily, and the 7-meter crown produces about 58 kWh per day. When these units are clustered—such as in groups of ten—they can collectively produce between 120 to 580 kWh each day, effectively powering off-grid homes, agricultural practices, educational institutions, and tourism operations without relying on diesel fuel. Additionally, the rainwater harvesting system integrated into the crown and core allows for localized water independence suitable for drinking, irrigation, and greywater use.
Material selection plays a significant role in addressing both environmental sustainability and cultural relevance. The system utilizes laminated bamboo, locally sourced Fijian hardwoods, bamboo-fiber composites, and geopolymer concrete, combining these materials with either ground-based or floating foundations based on site-specific conditions. Essential mechanical systems, photovoltaic receivers, the dual-axis tracking mechanism, and the energy transfer axis—a well-insulated structural column—are woven directly into the architectural design. At night, the underside of the mirror transforms into a source of ambient lighting powered entirely by the energy collected during the day.
As the deployment of the Fiji Solar Crown expands, it evolves from a singular architectural prototype into a scalable territorial system. Smaller units can serve individual households and farms, medium-sized modules bolster community infrastructure, and larger crowns anchor high-performance micro-grids, floating habitats, and elevated villages. Across all these variations, the system diminishes reliance on fossil fuels, stabilizes the water supply, moderates local climates, and establishes a consistent architectural identity rooted in regional traditions. This project exemplifies a new paradigm where architecture actively engages with environmental systems, harmonizing spatial design, structural integrity, and resource generation into a cohesive framework tailored for regions vulnerable to climate change.
