Reusable SpaceX Falcon Heavy will make highly cost competitive space based solar power

Space based solar power expert John Mankins, the author of the book The Case for Space Solar Power, estimates that if the launch price came down to about $400 per kilogram then space-based solar power would be cost-competitive with terrestrial solar energy.

A SpaceX Falcon Heavy will launch 63800 kilograms into low earth orbit for $90 million. This will be $1411 per kilogram.

SpaceX should be able to land the first stages for reuse. If they can get to a little over the ten reuses planned for the Falcon 9 block 5 then they could bring the costs down to $743 per kilogram.

This would bring the Mankin space-based solar power cost down to about 3 to 5 cents per kilowatt hour.