A bold shift in Singapore’s solar strategy is unfolding—and the implications could reshape how the city-state communities energy in the years ahead. But here's where it gets controversial: are we maximizing every available space, or are there hidden trade-offs we haven’t fully weighed yet?
Singapore is moving to pilot an innovative “overhang” solar PV system, which involves large structures suspended across the gaps between multi-story industrial buildings. JTC Corp, the government-backed industrial landlord, opened a tender on Wednesday for an overhang installation at 15 Woodlands Loop as part of a broader push to expand solar energy across industrial estates.
So far, Singapore has deployed about 1,775.4 megawatt-peak (MWp) of PV capacity nationwide, bringing it closer to its 2,000 MWp (2 GWp) target by 2030. That target aligns with the annual electricity consumption of roughly 350,000 households. Looking further ahead, solar could account for around 10 percent of Singapore’s projected electricity demand by 2050.
Today, most PV installations in Singapore sit on rooftops, vacant land, or bodies of water. Yet these options are approaching physical saturation. To keep expanding solar output, the government argues that it must increasingly co-locate solar with existing infrastructure rather than relying solely on conventional rooftop or ground-mounted systems.
The first phase of the overhang project covers design, construction, operation, and testing over 15 months. The aim is to establish a minimum capacity of 250 kWp across roughly 4,300 square meters of space between buildings. If successful, the system will operate for 10 years, with the generated electricity exported to the national grid. JTC also plans to evaluate deploying overhang PV systems in other industrial estates.
Overhang PV presents engineering challenges: the structures must carry additional weight, resist wind, and preserve safety standards. Researchers must carefully study the spacing between buildings to maximize solar exposure while maintaining the structural integrity, ventilation, and fire-safety requirements of the existing facilities.
This initiative follows JTC’s earlier efforts to tap underused spaces through the SolarRoof and SolarLand programs, launched in 2017 and 2018, which sought to harvest solar power from industrial rooftops and temporary vacant lands.
Finn Tay, JTC’s chief sustainability officer, emphasized that solar energy remains a cornerstone of Singapore’s renewable energy strategy. He noted that the pilot demonstrates a willingness to rethink underutilized spaces and push toward longer-term energy goals beyond traditional rooftop and ground-mounted installations.
As Singapore moves forward, the debate will likely focus on the balance between increased solar capacity and the practical limits of retrofitting existing industrial corridors. Do overhangs offer a scalable, safe, and cost-effective path to decarbonization, or might there be unintended consequences—such as higher maintenance costs, aesthetic concerns, or impacts on building operations—that warrant careful consideration? Share your thoughts in the comments: should Singapore embrace the overhang approach as a central pillar of its solar expansion, or should it pursue alternate strategies to diversify and de-risk solar deployment?
