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Successful Deployment of a Solar Power System at Mount Rainier National Park

Department of Energy (.gov) · last updated

The following winter of 2020–2021 had heavier snowfall than the previous winter. In the area that was previously damaged, ten of the 84 panels on this roof (12% of the panels on this roof, 9% of panels at the site) suffered damage; three of these were crushed and had broken glass.

These ten modules were adjacent to each other in the lowest row of panels on the roof. It is likely these ten panels had higher snow accumulation on them than on the others.

This loading also forced the modules downward, pulling on the racking system. Some module frames on the bottom of the modules were pulled free of the modules.

As the modules were pulled down, it is possible that the previously installed wooden support bar levered upwards on the underside of the modules, contributing to the damage.

The site is closed and inaccessible for the winter, so this damage was discovered by site staff the following summer.