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.
Perhaps the most important of the Classical Greeks' contributions to world culture was the idea that human excellence can be taught. The Greeks created the concept of liberal education, which they saw as a way to bring out the best in each and every individual.