Keppel to design, build, own and operate Singapore’s largest single-site rooftop solar photovoltaic system at Changi Airport when completed in early 2025.

Keppel Ltd has been appointed by Changi Airport Group to design, build, own and operate Singapore’s largest single-site rooftop solar photovoltaic system on the rooftop areas of Changi Airport terminal buildings.

The system will have a combined generation capacity of 43 Mega-Watt peak (MWp) is expected to be completed by early 2025. 38MWp will be installed on rooftops. The remaining 5MWp of solar generation capacity will come from solar PV system installed at 40,000m² turf area within Changi Airport’s airfield outside of aircraft operational areas.

The rooftop and airfield solar PV systems are expected to generate sufficient solar energy equal to what is needed to power more than 10,000 four-room HDB flats yearly. This allows CAG to reduce carbon emissions by approximately 20,000 tonnes annually, or about 10% of its consumption in 2019.

There are challenges when deploying the solar PV systems at Changi Airport. Robust simulation was required to ensure that the solar panels do not pose glare and glint effects to air traffic controllers and pilots or interfere with glint effects to air traffic controllers and pilots or interfere with communications, navigation & surveillance and meteorological signals. Installation and maintenance had to comply with aviation safety and security requirements, including fire safety code requirements prescribed by the Singapore Civil Defence Force.

The completed system will be integrated with Keppel’s state-of-the-art Operations Nerve Centre (ONC) sited within the Keppel Infrastructure@Changi building, which will offer remote monitoring and real-time reporting of solar generation metrics as well as advanced fault detection and diagnostics for predictive maintenance, all of which ensure high system up-time and optimal power generation. Keppel’s ONC also deploys artificial intelligence and machine learning algorithms to form adaptable models for better forecasting and energy management to optimise asset performance and operational outcomes.

Changi Airport Group has also appointed SolarGy Pte Ltd to transform the airport maintenance and storage centre into a greener facility by installing a 640kWp rooftop solar PV system which will cut the facility’s emissions by around 50%.

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