[krisoft]

> Imagine that it is floating over a 1km by 1km (or even 1 mile by 1 mile) area - what are you going to use against it?

Shrapnel generating warhead 100 meter over the solar field. Good luck finding and bypassing all the damage and short circuits.

Or send the precision missile to where the cable lands.

> the above assumes that there's no single energy collection point, of course

Probably not a literal single point, but I would assume any solar field would have a relatively low number of shore connections.