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.
Plato: A Very Short Introduction Aristotle Athens (c.384-322 BCE2) A student of Plato, Aristotle is perhaps the most influential of all the ancient Greek philosophers. He is famous for his empirical approach to studying nature, his theory of Four Causes (material, formal, efficient and final), and his development of formal logic. He was also a tutor for Alexander the Great. Aristotle: A Very Short Introduction