If it's meant to transfer momentum to a lightsail, then there is no requirement that the power must be delivered to a single point on the electrical grid. Sever

If it's meant to transfer momentum to a lightsail, then there is no requirement that the power must be delivered to a single point on the electrical grid. Several of these lasers in a smaller form factor dispersed over a rather large geographic region can all focus on a point in orbit and transfer nearly the same momentum as a single laser focused on that point would.