All-electric aircraft that run on electric motors powered exclusively by batteries have been around for over half a century, and some have even been certified since 2020. However, despite considerable progress, such machines have had run into the problem of scale. It's one thing to build a one-person craft or even a passenger vehicle capable of handling a dozen or so passengers. It's quite another to move into the weight class that commercial aircraft require to become economical.

The Heart Aerospace X1 Demonstrator represents a significant milestone in that, with its wingspan of 106 ft (32 m), it is comparable in size to conventional regional turboprops. The prototype's takeoff weight is considerably lower than that of, for example, a De Havilland Canada Dash 8-Q300, which comes in at 43,000 lb (19,500 kg), and it also suffers from a lower speed and operational range.