What crucial component did Zénobe Gramme invent around 1871 for commercial-scale electrical power?

Answer

A generator capable of sustained, large-scale output

Zénobe Gramme invented a generator powerful enough for industrial use on a commercial scale around 1871, providing the essential machine to convert mechanical energy into electrical current.

What crucial component did Zénobe Gramme invent around 1871 for commercial-scale electrical power?
inventorEngineerelectricitystationgeneration