Against the global consensus on "dual carbon" goals, Cowain Nantong Manufacturing Base has set a "textbook-level case" for industrial green transformation by installing a 4,251.34kW distributed PV system on its idle workshop roofs, converting sunlight into clean electricity for cost savings and carbon reduction. Tailored to its needs, the system uses high-efficiency PV modules arranged to "follow the sun" for maximum conversion. Power is prioritized for on-site production and lighting, with surplus fed into the grid—turning idle roofs into profitable "green power stations". Data shows the project generates 5 million kWh annually, saving 2.5 million yuan in electricity fees each year. The funds can boost R&D and equipment upgrades, achieving a win-win for energy conservation and profitability. Ecologically, its zero-emission power cuts 4,000 tons of carbon dioxide yearly—equivalent to planting 220,000 trees—contributing to Nantong’s environmental protection. Cowain Nantong’s practice proves industrial low-carbon transformation needs no "drastic measures"; making good use of existing resources like idle roofs paves a sustainable path.