Well, space it's sometimes not a very used word. The guy who jung in a astronaut suit from a meteorological hellium balloon wasn't in space, otherwise the ballom would not work, since space it's suposed to be vacuum.
This plane intents not top "space" but to reach a record using solar cells:
https://insideevs.com/sunpower-solar...edge-of-space/
I supose it will be a record for propeller airplanes, since jet airplanes with few rockets added already reached such altitude.