Grid Alternatives receives equipment donations from solar panel and inverter manufacturers such as SunPower and Enphase. They have a portable loud-speaker system, and there is an inverter, as you call it, at the transmitter. We can use automobile batteries, and the inverter will give us 110 AC for a while, until the batteries run down.
The ancient Greeks have made many influential contributions to western civilization. These contributions, which are also the achievements of ancient Greece, include certain things in the areas of philosophy, art and architecture, and math and science.
Ancient Greek philosophy arose in the 6th century BCE and continued throughout the Hellenistic period and the period in which Ancient Greece was part of the Roman Empire. It dealt with a wide variety of subjects, including political philosophy, ethics, metaphysics, ontology, logic, biology, rhetoric, and aesthetics.