How to retrofit residential air-source heat pumps to run on DC - pv magazine Global

U.S. researchers showed that standard residential air-source heat pumps can be retrofitted to operate directly on DC power with only minor modifications and no significant loss in performance. Their lab, field, and modeling work further indicates that DC nanogrids can improve system efficiency and reduce electricity costs by about 12.5–16.7%, mainly by reducing power conversion losses and improving integration with solar and storage systems.

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