Estimated U.S. small-scale solar generation increased from 18,812 to 92,979 gigawatt-hours over the past decade, covering systems below 1 MW.

The U.S. Energy Information Administration estimates that electricity generation from small-scale or rooftop solar photovoltaic systems increased from 18,812 gigawatt-hours to 92,979 gigawatt-hours over the past decade. Its definition covers systems with generating capacity smaller than one megawatt, rather than utility-scale solar installations.

The four states with the highest small-scale solar generation are California, Arizona, Texas, and Florida. EIA notes that these states are in regions with more abundant solar resources.

New York ranks fifth, despite being in a region with lower solar resources. EIA attributes its position to capacity growth supported by technological improvements and state incentives; the gigawatt-hour figures measure energy generated, while the one-megawatt threshold defines system capacity.