This visualization demonstrates binned aggregation and data transformation techniques using D3.js (v7). It loads solar energy data from a CSV file and computes the average maximum wattage per site address using `flatRollup` and `sum` functions. The resulting summary is displayed as formatted JSON text within a `<pre>` element, showcasing how raw tabular data can be programmatically summarized. The example uses D3's `csvParse` for data parsing and `select` for DOM manipulation.