My guess would be "not very well".
Its basically a glider, 193 ft wingspan is HUGE. Thats the size of an airbus A330. I'm not certain if the wingspan is needed to house the 12k plus solar panels or if the wing area is needed in order to provide extremely low wingloading while carrying an extremely heavy, large number of batteries.
Granted as battery tech gets better, less will be needed to store the required energy and as solar panels become more efficient - hopefully we won't need as many to charge the batteries.