Under "net metering" rules, which were enacted broadly to support distributed solar, that's not how it works: the generating consumer can offset billing for power use from the grid with excess power generation pushed back into the grid on a 1:1 basis, which amounts to paying them both for generation and for transmission.

People who have solar, who sell solar, who install solar, want to install solar, or who think distributed solar are a public good worthy of subsidy want to keep this rule.