HVDC - High volatage DC
HVAC - High voltage AC
Mainspring linear generator
Wireless Power beaming
Solar Wireless Power beaming
Microwaves pass through the atmosphere easily, and rectennae rectify microwaves into electricity very efficiently. In addition, Earth-based rectennae could be constructed with a mesh-like framework, allowing the sun and rain to reach the ground underneath and minimizing the environmental impact. Such a setup could provide a clean source of power.
Earth Has Received Power Beamed From A Satellite In Space For The First Time. Using their Microwave Array for Power-transfer Low-orbit Experiment (MAPLE), the Space Solar Power Demonstrator (SSPD) has showcased that transmitting power in space and from space to Earth is possible. This is the first time solar power has been transmitted from orbit and could be the first step toward a solar power station in space. First launched in January 2023, just two months later the device was able to transmit about 100 milliwatts worth of power through space and could easily be refocused to send the beam in any direction. The test sending power to Earth had about 1 milliwatt of power getting to the ground and was conducted three times over eight months.