Solcold passive cooling coating for outdoor rooftops
SolCold offers a passive cooling coating for rooftops that uses photonic cooling to reduce temperatures without energy consumption. It provides up to 170 W/m² of cooling, lowers ambient temperatures by up to 5°C, and cuts AC power usage by up to 50%.
Overview
SolCold's passive cooling coating is a groundbreaking solution for reducing outdoor surface temperatures without any energy consumption. Utilizing advanced photonic cooling technology, this self-adhesive film effectively converts solar radiation into a cooling force, achieving surface temperatures up to 5°C below ambient. Designed for rooftops and exterior walls exposed to sunlight, the coating significantly reduces the need for air conditioning, resulting in substantial energy savings, cost reductions, and decreased CO2 emissions.
Technical specifications
Key features:
- Nanoparticle-enhanced for superior cooling performance
- Provides up to 170 W/m² of cooling power
- Achieves temperature reductions of up to 20°C on surfaces and 10°C at chiller intakes
- Extends surface lifespan by up to 30% by minimizing heat load and material degradation
- Improves solar panel output by 2%
- Reduces annual CO2 emissions by at least 12,000 kg per building
- Offers a payback period of 1.1 to 3.5 years
Application process:
- Material shipment (~1 week)
- Installation of sensors and data loggers (1–2 days)
- Baseline measurements (1–2 weeks)
- Site preparation (2–3 days)
- Coating application (~5 days)
- Post-application monitoring (3-4 months)
- Data analysis and reporting (2–3 days)
- Post-project review
Technology readiness level
This technology is at TRL 8, indicating it has been demonstrated in an operational environment and is ready for commercialization. Future validation involves comparing coated and uncoated rooftop areas under real-world conditions to further assess performance metrics.
About SolCold
SolCold is a climate technology company that develops advanced, patented nano-technological coatings designed for passive cooling. Founded in 2016 and based in Israel, the company's proprietary film-like technology operates by integrating three primary mechanisms: reflecting 98.5% of solar radiation, converting absorbed heat into higher-frequency photons, and releasing that energy back into the atmosphere through radiative cooling. This process enables surfaces to stay cool under direct sunlight without the need for fuel, electricity, or emissions, providing a sustainable alternative to conventional cooling systems.
The technology is applicable to a wide range of surfaces, including commercial buildings, containers, silos, electronics, cars, and textiles. By reducing internal temperatures, SolCold's solutions help customers lower air-conditioning energy consumption by 5% to 40% and significantly decrease greenhouse gas emissions. These coatings are particularly effective during extreme heat, offering benefits such as prolonging the lifespan of temperature-sensitive goods and electronics, maintaining equipment productivity during heat waves, and delivering cost savings through improved energy efficiency. The company works with various industries to deploy these coatings, demonstrating significant real-world temperature reductions in field studies.
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