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W. M. Keck Observatory and solar panels
Photo credit: M. Devenot

The on University of Âé¶¹´«Ã½-managed lands on Maunakea on Âé¶¹´«Ã½ Island has completed a solar photovoltaic (PV) system project.

W. M. Keck Observatory and solar panels
Photo credit: M. Devenot

The PV system on the rooftop of Keck Observatory¡¯s telescope facility will produce more than 259 MWh of energy and reduce approximately 10–15% of the observatory¡¯s need for electrical power and 183 metric tons of carbon emissions.

The solar site is the world¡¯s largest commercial solar system installed at the highest altitude. Hawaiian Electric approved operation of the PV system on September 30. It consists of a 133-kW PV array and 332 solar panels that are strategically placed on the unique 20,940 square-foot ballasted roof to avoid snow and ice fall from the domes.

At high altitude, the panels will catch more photons and produce more energy than at sea-level locations. This is because sunlight atop Maunakea doesn¡¯t have to travel through as much of the Earth¡¯s atmosphere where the photons could be absorbed by something else. Having 40% less atmosphere is one feature that makes Maunakea one of the best places on Earth to conduct astronomy.

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