American Clean Power Association (ACP) | 82,103 followers on LinkedIn. The American Clean Power Association (ACP) is the leading voice of today’s multi-tech clean energy industry. | The American Clean Power Association (ACP) is the leading voice of today’s multi-tech clean energy industry, representing energy storage, wind, utility-scale solar, clean hydrogen, and transmission companies. ACP is committed to meeting America’s energy and national security goals and building our economy with fast-growing, low-cost, and reliable domestic power.