So does this mean that you can offset your electricity cost because your solar panel just sends the electricity it generated back into the grid (and credits you

So does this mean that you can offset your electricity cost because your solar panel just sends the electricity it generated back into the grid (and credits you for it)? How could I verify that it's working? It looks like you might also have to sign some sort of a contract with PG&E. Is this true? https://www.pge.com/includes/docs/pdfs/b2b/wholesaleelectricsuppliersolicitation/Feedin_Tariffs_FAQs https://www.pge.com/includes/docs/pdfs/b2b/wholesaleelectric....