What Amer-Sil does

Amer-Sil S.A. is a privately held Luxembourg-based manufacturer (founded 1970) of battery components for industrial applications, with 251-500 employees and an EXW Kehlen go-to-market model selling directly to global battery manufacturers. Its core products are PVC-silica microporous separators and tubular-plate gauntlets for industrial lead-acid batteries, with application-specific variants for traction/motive power (AS-Motra), stationary/reserve power (AS-Endura), gel monobloc (AS-HyperGel), and stationary corrugated formats. Customization is central: separators are produced in thicknesses from 0.6mm to 4.9mm with more than 60 calender roll combinations, and gauntlets are offered in spun bond, spun lace, and woven polyester in customizable geometries.

The company is the only global supplier offering both separators and gauntlets for lead-acid batteries, and together with its Indian joint venture Amer-Sil Ketex it operates what it describes as the largest and most advanced worldwide manufacturing network for gauntlets. Production is distributed across Luxembourg, China (Shanghai/Changxing), India (Kharagpur, Bangalore, Gagret), and Bangladesh (Dhaka), generating revenue through direct industrial hardware sales. Beyond lead-acid, Amer-Sil is positioning for growth in long-duration energy storage via small pore separators for redox flow batteries (vanadium, zinc bromine, all-iron chemistries) and hierarchically structured ion exchange membranes for RFB and electrodialysis. R&D is anchored in the Guy Dauwe R&D centre (opened February 2020) and supported by FlowCamp, Flow Batteries Europe, FNR PhD funding, and partnerships with leading universities and consortiums. Revenue is not publicly disclosed.

Name

Amer-Sil

Legal name

AMER-SIL S.A.

Website

https://amer-sil.com

Company type

Private

Founded year

1970

Operating status

Operating

Headcount range

251–500 employees

Short description

Amer-Sil is a Luxembourg-based manufacturer of PVC-silica microporous separators and gauntlets for industrial lead-acid and redox flow batteries, serving global battery OEMs from production facilities in Luxembourg, China, India, and Bangladesh.

Ownership category

akta.pro rank

Product category

Industrial Battery Components

NAICS

Broadwoven Fabric Mills (313210)

SIC

Miscellaneous Chemical Products (2890)

akta.pro primary industry

Separators & Membranes Manufacturing (EUAFABAE)

akta.pro secondary industry

Battery Modules & Packs (Industrial/Commercial pack assembly) (IMAGAHAB)

Keywords

• Lead-acid battery separators
• Microporous PVC-silica membranes
• Tubular plate gauntlets
• Redox flow battery components
• Ion exchange membranes

Headquarters

HQ city

Kehlen

HQ country

Luxembourg

HQ region

Europe

Offices6 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Battery Component Manufacturing: Amer-Sil generates revenue through manufacturing and selling separators and gauntlets for industrial lead-acid batteries and redox flow batteries. Products are sold directly to battery manufacturers globally. The company produces customized solutions based on customer specifications.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Amer-Sil designs and manufactures microporous PVC-silica separators and woven/non-woven gauntlets used as components inside industrial lead-acid batteries and redox flow batteries. It also develops small-pore separators and ion exchange membranes for redox flow battery and electrodialysis applications. Products are sold directly to industrial battery manufacturers worldwide, with customized solutions based on customer specifications.

Product overview

Amer-Sil is a manufacturer of battery components, specifically micro-porous polymer/silica separators and gauntlets for lead-acid and redox flow batteries. The company offers both separators and gauntlets as its two main product lines. Separators include pattern-specific products (DWN, DWT), application-specific separators (AS-Motra for traction, AS-Endura for stationary, AS-HyperGel for gel), corrugated separators, and small pore separators for redox flow batteries. Gauntlets include non-woven (spun bond/spun lace) and woven variants. The company also develops ion exchange membranes for RFB and electrodialysis applications. Amer-Sil serves industrial, traction/motive power, stationary, and energy storage markets with over 50 years of experience.

Differentiator

Problem solved

Functional benefit

Products and services

• DWN Pattern Separator Microporous separator for traction/motive power lead-acid batteries with diagonal ribs (12mm spacing) on the positive side and straight mini ribs (3mm spacing) on the negative side, available in thickness 1mm to 4mm.
• AS-Motra Separator Microporous separator designed for traction/motive power applications, offering 68% volume porosity, very low electrical resistance, excellent oxidation resistance, and immediate wettability, available in leaf, sleeve, and roll form.
• AS-Endura Separator Microporous separator for stationary, reserve power, and standby lead-acid battery applications, with 72% volume porosity, excellent oxidation resistance, and phosphoric acid compatibility, available in leaf, sleeve, and roll form.
• DWT Pattern Separator Microporous separator for stationary lead-acid battery applications, available in thickness ranging from 0.6mm to 4.5mm.
• AS-HyperGel Separator Microporous separator designed for high-quality gel monobloc lead-acid batteries with optimal pore size to provide best battery performance in GEL technology.
• Corrugated Separators High-volume porosity separators (73% to close to 80%) with very low acid displacement and excellent oxidation resistance, available in sinusoidal and straight corrugation with thickness 1.2mm to 4.9mm, laminated with glass mat.
• Small Pore Separators (RFB) PVC-silica microporous separators tuned for low electric resistivity and minimal electrolyte crossflow, suitable for vanadium, zinc bromine, and all-iron redox flow batteries, offered at a fraction of the cost of ion-exchange membranes.
• Ion Exchange Membranes Hierarchically structured ion exchange membranes for redox flow batteries and electrodialysis processes, available with anionic and cationic functionality, fabricated using innovative sustainable and cost-effective processes.
• Non-Woven Gauntlets Gauntlets for tubular plates in non-woven spun bond and spun lace fabric, made of high-quality polyester fabric with reinforced variants for critical filling or operating conditions, suitable for traction, stationary, flooded batteries, and gel applications.
• Woven Gauntlets Gauntlets for tubular plates made of high-quality polyester yarns in various yarn types, suitable for industrial traction and stationary battery applications.

Quantifiable outcome

• Volume porosity up to 80% for corrugated separators
• +2 more outcomes

Named customers2 records

Segments5 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Eight partnerships are on record, tiered core, flagship and minor.

• Flow Batteries Europe (FBE)coreStrategic or Co-development PartnerAmer-Sil recently joined Flow Batteries Europe as a new member. This membership represents a commitment to collaborate with other stakeholders in the flow battery industry, share knowledge, and actively contribute to the advancement of flow battery technology in Europe.
• FlowCampflagshipStrategic or Co-development PartnerEU Innovative Training Network established by the Marie Sklodowska Curie program. Amer-Sil is one of 11 partner organizations collaborating on research and training in flow battery technology.
• Consortium for Battery InnovationcoreStrategic or Co-development PartnerAmer-Sil participates in international research associations in the industry and promotes public research projects with the world's leading universities.
• Luxembourg National Research Fund (FNR)coreStrategic or Co-development PartnerPhD grant 2019 for Amer-Sil R&D department supporting research and development activities.
• Battery Council International (BCI)coreGTM or Marketing PartnerTrade association of manufacturers of original-equipment and after-market automobile batteries and other lead-acid batteries.
• EurobatcoreGTM or Marketing PartnerAssociation for the European manufacturers of automotive, industrial and energy storage batteries.
• International Lead Association (ILA)minorGTM or Marketing PartnerOrganisation dedicated to serving lead producers and other companies that have a direct interest in lead and its use.
• Partner Research InstitutionscoreStrategic or Co-development PartnerCollaborative research institutions for development of ion exchange membranes and other advanced technologies. Initial membrane performance evaluation results have been published in international peer reviewed journals.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Emerging players

• W-Scope: Japanese manufacturer of polyolefin separators primarily serving lithium-ion battery makers. Represents the Li-ion-focused side of the broader separator market where Amer-Sil is not yet present.
• SK ieMT: Subsidiary of SK Innovation producing ceramic-coated and PE separators for lithium-ion batteries. Adjacent technology player rather than direct lead-acid competitor, but increasingly relevant as storage markets converge.

Broad incumbents

• Toray Industries: Japanese materials major with battery separator films and membrane products. Larger and more diversified than Amer-Sil, with overlapping separator/membrane capabilities across multiple battery chemistries.
• Freudenberg Performance Materials: Division of the German Freudenberg Group, supplies Separion-brand separators and nonwoven battery components. Larger, more diversified player with broad industrial filtration and battery materials portfolios.
• Asahi Kasei: Japanese conglomerate that manufactures Hipore polyethylene separators for lead-acid batteries and owns Celgard (lithium-ion separators). A broad incumbent competing with Amer-Sil in lead-acid while dominating Li-ion separators.
• Celgard: Asahi Kasei subsidiary specializing in microporous PE and PP separators for lithium-ion batteries. Indirect competitor representing the technology direction lead-acid separator makers may need to follow.

Direct peers

• Daramic: Owned by Polypore/Sumitomo, Daramic is the global market leader in PE separators for lead-acid batteries. Head-to-head competitor with Amer-Sil across traction, stationary, and automotive lead-acid applications.
• Hollingsworth Vose: US-based manufacturer of nonwoven battery separators and filtration media. Overlaps with Amer-Sil in glass-mat laminated and nonwoven separator formats for industrial lead-acid batteries.
• Bernard Dumas: French manufacturer of woven and non-woven gauntlets for tubular-plate lead-acid batteries. Closest direct competitor to Amer-Sil's gauntlet franchise, particularly in European and African markets.
• Entek International: US-based manufacturer of polyethylene (PE) battery separators for lead-acid and lithium-ion batteries. Direct competitor to Amer-Sil's separator business with overlapping customer base among industrial battery OEMs.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/amer-sil

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Amer-Sil