Which electrical system did Edison oppose in favor of his own inventions?

Edison opposed the use of alternating current (AC) in favor of his own inventions, which were based on direct current (DC). He believed that DC was safer and more reliable for electrical power distribution. Edison's commitment to DC was rooted in his development of the first practical electric light bulb and the electrical systems that powered it. He perceived AC as a threat to his inventions and business interests, especially as AC systems offered advantages for long-distance transmission of electricity due to their ability to be easily transformed to higher voltages.

In the context of the time, AC systems, developed largely by Nikola Tesla and supported by George Westinghouse, were gaining popularity because they could carry power over longer distances without significant loss of energy, an advantage that influenced the eventual adoption of AC as the standard for electrical distribution. Edison's resistance to AC was not just a matter of technical preference; it was also tied to business rivalry and the broader electric power market's evolution during that era.