For fixed solar panel installations in Hong Kong Island, the ideal tilt angle to maximize year-round electricity production is 20 degrees facing South. This angle optimizes the capture of solar energy across all seasons, balancing between the higher summer sun and lower winter sun. . The Hong Kong Solar Irradiation Map (the Map) seeks to promote solar photovoltaic (PV) installations at building rooftops. By showing the distribution and intensity of solar irradiation of building rooftops, the Map enables members of the public to conduct a preliminary assessment of their building. . For fixed-panel installations, it's recommended that panels be tilted at an angle of 20 degrees facing South to maximize their exposure to sunlight throughout the year. However, there is no detailed study which considers the local weather conditions regarding the optimum angle. Get year-round, winter, and summer tilt recommendations. Click on any location for more detailed information.
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