PG&E hits 1 million solar customers — what it means for grids

Pacific Gas and Electric (PG&E), one of the largest utility companies in the United States, has officially crossed the threshold of 1 million customers with grid-connected solar systems. The utility serves a large portion of Northern and Central California, and solar adoption in its territory has been building for more than three decades — from early adopters in the 1990s, through steady growth in the 2000s, to the rapid expansion of recent years.

What does 1 million solar connections actually mean for the grid?

For solar and storage professionals globally, the PG&E milestone signals that mass residential solar is no longer a niche sector. The integration challenge has become the central issue: how do utilities handle bidirectional flows, dynamic pricing, and the coordination of home batteries and smart inverters at scale? These are questions equally relevant in Germany, Spain, Hungary and across the EU.

The next frontier: storage and smart integration