Lets say they build a strat large enough to hold 5000 sq meters of solar collectors.
Each sq meter produces 150wh for a total of 750,000wh, times 10hrs = 7,500,000wh per day.
4 one year that's 2,737,500,000 / 1000 = 2,737,500 KWh per year
@ .25/KWh that a gross income of $648,375 per ship
During the night any airship that needs servicing could be brought down and replaced.
Power could be beamed to any sub station reducing typical transmission losses
Could happen cole