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Business and Organization | 12 Months Ended
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Sep. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Business and Organization | Business and Organization Powell Industries, Inc. (we, us, our, Powell or the Company) is a Delaware corporation founded by William E. Powell in 1947. Our major subsidiaries, all of which are wholly owned, include Powell Electrical Systems, Inc.; Powell (UK) Limited; Powell Canada Inc.; and Powell Industries International Limited. We are headquartered in Houston, Texas, and primarily serve the oil and gas and petrochemical markets, the electric utility market, and commercial and other industrial markets. Beyond these major markets, we also provide products and services to the light rail traction power market and other markets that include universities and government entities. We are continuously developing new channels to electrical markets through original equipment manufacturers and distribution market channels. Our principal products include integrated power control room substations (PCRs®), custom-engineered modules, electrical houses (E-Houses), traditional and arc-resistant distribution switchgear and control gear, medium-voltage circuit breakers, monitoring and control communications systems, motor c ontrol centers, switches and bus duct systems. These products are designed for application voltages ranging from 480 volts to 38,000 volts. Our product scope includes designs tested to meet both United States (U.S.) and international standards, under both the American National Standards Institute (ANSI) and International Electrotechnical Commission (IEC). We also provide spare parts, retrofit and retrofill components for existing systems, and replacement circuit breakers for obsolete switchgear no longer produced by the original manufacturer. Our principal services include field service inspection, installation, commissioning, modification and repair services. We seek to establish long-term relationships with the end users of our systems as well as design and construction engineering firms contracted by those end users. We believe that our culture of safety and focus on customer satisfaction, along with our financial strength, allow us to continue to capitalize on opportunities in the industries we serve. References to Fiscal 2025, Fiscal 2024 and Fiscal 2023 used throughout these Notes to Consolidated Financial Statements relate to our fiscal years ended September 30, 2025, 2024 and 2023, respectively.

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- Definition The entire disclosure for the nature of an entity's business, major products or services, principal markets including location, and the relative importance of its operations in each business and the basis for the determination, including but not limited to, assets, revenues, or earnings. For an entity that has not commenced principal operations, disclosures about the risks and uncertainties related to the activities in which the entity is currently engaged and an understanding of what those activities are being directed toward. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 275 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482836/275-10-55-4 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 275 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482836/275-10-55-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 275 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482861/275-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -SubTopic 10 -Topic 275 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482861/275-10-50-1 + Details
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