Looks like they claim 30kw for current product, and 100kw for an iteration coming soon, rather than 10kw. Also for 10kw, we are talking about 40 square meters of area, and the base station for these is about 20 square meters, and yes this is still comparing just the base station of one to total footprint of the other, and if we compared total deployed area, then solar *easily* wins in every factor except for all I know cost.
However while the total area may be pretty large, the area doesn't have to be as cleared or denied sunlight. So you might get to ignore the overall volume for some applications. So it might be fair to compare the ground station footprint to solar footprint.
For example you have a farm where the land is valuable for crops, but you could abide an airfoil around when the fields aren't being worked, or are being worked by pure automation. When you need the flight area worked, you can probably easily land the airfoil for that duration, and then return it to operation when that is done.
Conversely, useless in urban or suburban scenarios but solar is trivial to deploy there.
So if you have a bunch of effectively wasteland, I think this is unlikely to make any sense. But if you have a nuanced land area where people don't need to be, but you do want the land for other purposes, I could see this kite scenario playing out.