The X1 aircraft is comparable in size to a small regional airliner and can achieve a maximum takeoff weight exceeding 25,000 pounds with the help of four wing-mounted electric motors. The battery-electric propulsion system delivered more than one megawatt of power during the maiden flight.
The electric engines are easier to maintain than jet engines. Far less parts, especially not having to deal with fuel pumps and all the safety issues around fuel storage. Not having to withstand the huge temperature differential between the engine combustion and the high altitude air probably helps too.