Performance metrics & physics
Solar Irradiance Singapore
Singapore solar irradiance averages 850 W/m² midday with peaks above 1,000 W/m², among the highest sustained levels globally — driving the heavy aircon load aftermarket window film helps offset.
Singapore sits one degree north of the equator. The sun crosses near-vertically overhead year-round, with minimal seasonal variation in peak solar irradiance.
Peak noon solar radiation regularly exceeds 1,000 W/m² on clear days. Annual average direct normal irradiance is around 1,800 kWh/m², compared to 1,300 kWh/m² for temperate cities like London or Tokyo.
This is why total solar energy rejection translates to bigger absolute heat reductions in Singapore than in cooler markets. A film that rejects 60% of solar energy is rejecting more total watts here than the same film in Sydney or Seoul.