Rooftop Solar Framework for New Residential Housing Developments in Saudi Arabia

In the vast, sun-drenched landscapes of Saudi Arabia, the potential to harness solar power is immense, ranking among the highest in the world. Yet, for the average homeowner, the idea of installing solar panels on their roof has remained largely out of reach. The barriers are practical and financial: electricity is cheap, making the savings from solar less urgent, while the upfront cost of buying and installing a system is high. Furthermore, the decision to go solar usually falls on the individual homeowner, who must navigate the complexities of financing, choosing equipment, and managing installation. This study explores a different path, one that shifts the decision from the individual to the builder. Instead of waiting for thousands of separate homeowners to make a complex choice, the researchers propose a policy where new residential developments are required to install solar systems as part of the construction process itself. By embedding the technology into the building before a single family moves in, the study investigates whether this mandatory approach could unlock the country's solar potential, balance the costs for developers, and create a steady market for renewable energy industries.

The researchers focused on a specific type of housing common in the region: the villa. They imagined a scenario where a new neighborhood is planned with ten thousand of these homes. Under current conditions, getting solar panels onto each of these roofs would depend on every single future owner deciding to buy them, finding a contractor, and paying for the work. The study suggests that if a rule required builders to install the panels during construction, the process would become streamlined and predictable. The team did not test this on actual homes, as no such mandatory project existed yet. Instead, they built a detailed simulation using data from several existing studies on Saudi residential solar projects. They averaged out the typical size of a system, how much electricity it would produce under the local sun, and the cost to install it. Their calculations assumed a standard system size for each villa, which, when multiplied by ten thousand homes, created a massive, unified project.

The results of this simulation reveal a significant shift in scale. If ten thousand villas were built with this requirement, the total solar capacity would reach one hundred and twenty megawatts. This single neighborhood would generate enough electricity to power a small city, producing two hundred and sixteen million kilowatt-hours of clean energy every year. To put this in perspective, this amount represents roughly two percent of the entire country's operational renewable energy capacity at the end of 2024. While this single neighborhood would not transform the national grid on its own, it demonstrates that a relatively small number of new homes could add a measurable and powerful chunk of solar power to the system. The study highlights that because solar energy is produced during the day when air conditioning use is highest, most of this electricity would be used directly by the homes rather than sent back to the grid, making the system highly efficient for the residents.

Beyond the sheer volume of energy, the study looked closely at the financial and environmental impact. The total cost to install these systems across the ten thousand villas was estimated at four hundred and eighty million Saudi riyals. When this cost is compared to the value of the electricity the system would generate, the study calculates a payback period of roughly twelve and a half years. This figure is based on the current price of electricity in the country and serves as a benchmark for how long it would take for the energy savings to equal the initial investment. The researchers noted that this timeline could improve if the bulk purchasing of materials for such a large project lowered the overall costs. Environmentally, the impact is substantial. By replacing electricity that would otherwise come from the national grid, this hypothetical neighborhood would prevent the release of approximately one hundred and twenty-two thousand tonnes of carbon dioxide every year.

The paper also examines how this approach changes the market for solar energy. Currently, the industry relies on fragmented sales to individual homeowners, which can be unpredictable and difficult to manage. By mandating installation for new developments, the study suggests a new, stable market would emerge. Manufacturers, electricians, and engineering firms would have a predictable stream of work, allowing them to plan better and potentially invest in local manufacturing. This shift could also create jobs, both in the short term during the installation phase and in the long term for maintenance and monitoring. The researchers are careful to note that their findings are based on a hypothetical scenario using existing data, not on a real-world test of a mandatory policy. They acknowledge that without actual data on how much electricity each specific home consumes, the exact savings and environmental benefits remain estimates. However, the study concludes that this framework offers a viable way to overcome the financial and cultural hurdles that have kept residential solar adoption low, turning the construction of new homes into a powerful engine for renewable energy growth.