What EnerSys makes

EnerSys is one of the largest makers of industrial stored-energy systems in the world, and its products fall into three lines. Energy Systems, its biggest at about $1.65 billion in fiscal 2026, covers reserve-power batteries, chargers, and power electronics for telecom networks, data centers, utilities, and broadband, sold under names like PowerSafe, DataSafe, Genesis, and Alpha. Motive Power, about $1.43 billion, makes the batteries and chargers that run electric forklifts and other material-handling vehicles, under Hawker, NexSys, IRONCLAD, and General Battery. Specialty, about $665 million, makes premium and aftermarket batteries for automotive auxiliary power, powersports, marine and RV, transportation, aerospace and defense, and medical use, most visibly under the ODYSSEY brand.

That Specialty line is where EnerSys touches the automotive aftermarket most directly. ODYSSEY batteries are sold for sleeper-cab and commercial-fleet auxiliary power, for premium and start-stop automotive applications, and for powersports vehicles including Harley-Davidson motorcycles and Polaris ATVs. Across all three segments EnerSys works in lead-acid, thin-plate pure-lead, and lithium-ion chemistries, and it provides aftermarket and customer-support service in more than 100 countries.

Financial performance

EnerSys trades on the New York Stock Exchange as ENS. In fiscal 2026, the year ended March 31, 2026, it reported net sales of $3.75 billion, up 3.7 percent year over year, and GAAP net earnings of $293.6 million. Diluted earnings per share were $7.70 on a GAAP basis and $10.56 adjusted, up 4 percent. Gross margin was 29.3 percent, and GAAP operating earnings were $426.4 million, an operating margin near 11 percent.

The balance sheet is the notable part for a buyer weighing supplier stability. At fiscal 2026 year-end EnerSys held $438.7 million in cash against $1.11 billion of total debt, for net debt of $684.1 million, a modest load against its operating earnings. The company returned $408.8 million to shareholders during the year, $370.7 million in buybacks and $38.1 million in dividends, at a dividend of $1.0275 per share. This is a company generating cash and choosing to return a large share of it, not one stretching to cover its obligations.

Ownership and history

EnerSys is publicly held, listed on the NYSE since its 2004 initial public offering, and is a component of the S&P MidCap 400. The current company was formed in 2000 through a management buyout of the industrial-battery business that had been Yuasa's US operations, but its lineage runs much deeper: the roots trace to The Electric Storage Battery Company, founded in 1888, one of the oldest names in stored energy. Headquarters are at 2366 Bernville Road in Reading, Pennsylvania. The company employs roughly 9,700 people and operates 26 manufacturing plants worldwide, alongside sales and service coverage in more than 100 countries. Leadership per the company's own materials: Shawn O'Connell, President and Chief Executive Officer since May 2025, and Andrea Funk, Executive Vice President and Chief Financial Officer since April 2022.

Certifications and quality

EnerSys requires ISO 9001:2015 certification at every manufacturing site globally, and its per-site certificates carry current-cycle expiry dates running through 2027 and 2028. On top of that baseline, individual plants hold the certifications their served industries demand: AS9100 for aerospace, ISO 13485:2016 for medical devices, ISO/TS 22163:2017 for rail, IATF 16949:2016 for automotive, and ISO 19443 for nuclear. The company also reports its first lithium-ion product-safety certification under ISO 26262. For an OEM or tier supplier qualifying a battery source, that spread of standards matters as much as the ISO baseline, because it decides which of EnerSys's plants can run automotive or aerospace program work, typically through a production part approval sign-off.

Known customers

EnerSys reports serving more than 10,000 customers, but it does not disclose named-customer contracts at the program level in its public filings, which is normal for a diversified components maker. What is on the record is the set of end-markets it supplies: telecommunications and broadband networks, electric utilities, data centers, material-handling and logistics fleets, transportation, and aerospace and defense, including US government and defense programs through units such as its aerospace-and-defense and Bren-Tronics operations. Rather than publish a named-customer table that no single source supports, this profile frames EnerSys by those documented markets. Buyers evaluating it as a battery or power-electronics source should expect a supplier whose largest revenue sits in network-infrastructure and material-handling power, with a distinct aftermarket automotive line under ODYSSEY.

Sourcing evidence

EnerSys's US import record reads as an intra-company distribution footprint, not a raw-material sourcing map. Its main importer entity, Enersys Delaware, shows 10,220 US sea shipments from January 2015 through September 2026, with the most recent on September 20, 2026, at an average of about 3.1 TEU per shipment. The largest shippers into the US are EnerSys's own overseas plants and a handful of specialist component makers, not third-party contract manufacturers:

Seven shown of about 30 recorded shipper names. By origin, the flow leads with Switzerland (2,892 shipments), China (1,850), the United Kingdom (1,566), Belgium (932), Thailand (678), and Vietnam (655). The goods are finished lead-acid batteries and battery parts, plus chargers and battery separators, which is what you would expect from a manufacturer moving its own European and Asian output into the US market. Recent monthly volume has cooled, with the trailing month running about 45 percent below the prior-year level, a shift worth noting alongside the company's steady overall revenue.

These are US ocean-freight records only. Air, truck, and rail movements do not appear, some records name freight intermediaries rather than plants, and product categories come from declared manifest codes, which are noisy. Absence of a record is not evidence of absence. Buyers weighing nearshoring or tariff exposure should read this as evidence of where EnerSys manufactures, not of who supplies it.

Frequently asked questions

What does EnerSys make?

EnerSys makes industrial stored-energy systems across three lines: reserve-power batteries, chargers, and power electronics for telecom, data centers, and utilities (Energy Systems); motive-power batteries and chargers for electric forklifts and material-handling vehicles (Motive Power); and premium and aftermarket batteries for automotive, powersports, marine, aerospace, defense, and medical use (Specialty, most visibly the ODYSSEY brand). It works in lead-acid, thin-plate pure-lead, and lithium-ion chemistries.

Who owns EnerSys?

EnerSys is a publicly traded company, listed on the New York Stock Exchange under the ticker ENS and part of the S&P MidCap 400. It was formed in 2000 through a management buyout and went public in 2004. Its heritage traces to The Electric Storage Battery Company, founded in 1888.

What is EnerSys's annual revenue?

EnerSys reported net sales of $3.75 billion for fiscal 2026, the year ended March 31, 2026, up 3.7 percent year over year, with GAAP net earnings of $293.6 million and adjusted diluted earnings per share of $10.56.

Where is EnerSys headquartered?

EnerSys is headquartered at 2366 Bernville Road in Reading, Pennsylvania. It operates 26 manufacturing plants worldwide and provides sales and service in more than 100 countries, employing roughly 9,700 people.

What certifications does EnerSys hold?

EnerSys requires ISO 9001:2015 certification at all manufacturing sites globally, with per-site certificates in their current cycles through 2027 and 2028. Individual plants also hold industry certifications including AS9100 (aerospace), ISO 13485:2016 (medical), ISO/TS 22163:2017 (rail), IATF 16949:2016 (automotive), and ISO 19443 (nuclear), plus a first ISO 26262 lithium-ion product-safety certification.

Does EnerSys supply the automotive aftermarket?

Yes. EnerSys's Specialty segment includes its ODYSSEY brand, sold for automotive auxiliary power, commercial-fleet sleeper cabs, powersports vehicles such as Harley-Davidson motorcycles and Polaris ATVs, and marine and RV use. The company also provides aftermarket and customer-support service across more than 100 countries.

Last verified September 27, 2026. Is this your company? Request a correction.