Ebwh-049 -

The EBWH-049 typically features a self-contained heat pump unit mounted atop a storage tank, often referred to as a "hybrid" system.

By utilizing ambient air and electricity (ideally from renewable sources), these units help reduce on-site carbon emissions. Technical Specifications and Performance Heat Pump Water Heaters | Department of Energy

Heat pump water heaters like this model can be two to three times more efficient than standard electric units because they move heat rather than generate it.