What S:FLEX does

S:FLEX GmbH is a German manufacturer of photovoltaic (PV) mounting systems, founded in 2009 and headquartered in Bad Krozingen near Freiburg, with a regional office in Rangsdorf (Berlin) and 51-100 employees. The company designs, produces, and distributes prefabricated and partially pre-assembled mounting substructures for flat roofs, pitched roofs, facades, open ground, carports, and balcony applications. Its core technology centers on patented click-fit mechanisms for fast module fixation, lightweight hollow chamber aluminum rails (ST-AK and HK series), UL2703-certified earthing components, and engineered system sub-brands such as LEICHTmount (flat roof), GreenLight (flat roof with recycled-HDPE drainage tray), Delta Concrete (ground mount), and ELS (facade). Supporting the hardware is a digital service stack including a web-based planning tool (planungstool.sflex.com), a material calculator, an online shop, and a document server.

The company operates a B2B hardware sales model selling physical mounting components and system solutions to solar installers and PV project planners through a direct online shop (unit pricing for small orders) and dedicated field sales with specialist planners for larger custom projects. Pricing is not publicly disclosed and is quote-based for project work. In May 2026, S:FLEX formed a strategic alliance with ALUMERO and the joint venture next mounting GmbH to extend reach into large retail customers and OEM partners, with ALUMERO handling European production (including the metagreen recycled-aluminum concept) and S:FLEX contributing engineering and logistics. Revenue is generated exclusively from hardware sales and customized engineering solutions; no software, subscription, or services revenue streams are disclosed.

Name

S:FLEX

Legal name

S:FLEX GmbH

Website

https://sflex.com

Company type

Private

Founded year

2009

Operating status

Operating

Headcount range

51–100 employees

Short description

S:FLEX GmbH is a German B2B manufacturer of prefabricated photovoltaic mounting systems for flat, pitched, and ground-mounted solar installations. It sells hardware to solar installers and, via its next mounting GmbH joint venture with ALUMERO, to large retail and OEM partners.

Ownership category

akta.pro rank

Product category

Solar PV Mounting Systems

NAICS

Sheet Metal Work Manufacturing (332322)

SIC

Prefabricated Metal Buildings & Components (3448), Bolts, Nuts, Screws, Rivets & Washers (3452)

akta.pro primary industry

Solar Mounting, Racking, Trackers & Structural BOS Manufacturing (EUAMAHAC)

akta.pro secondary industries

Solar Roofing & Roof-Mounted PV Systems (IMADAFAO), Metal Roofing Systems (IMADAFAB), Flashing, Edge Metal & Roof Accessories (IMADAFAJ)

Keywords

• PV mounting systems
• Solar racking solutions
• Photovoltaic installation hardware
• Flat roof mounting
• Rooftop solar structures

Headquarters

HQ city

Hamburg

HQ country

Germany

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. PV Mounting Systems Sales: Sale of prefabricated and partially pre-assembled substructures for flat roofs, pitched roofs, and open-air systems. Products include mounting rails, module clamps, roof hooks, standing seam clamps, and complete system solutions.
2. Customized Solutions: Custom-designed mounting solutions developed in close cooperation with partners, providing project-specific engineering services

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels5 records

Core offering

S:FLEX GmbH designs, manufactures, and sells prefabricated photovoltaic (PV) mounting systems and substructures for flat roofs, pitched roofs, facades, balconies, open ground, and carports. The portfolio includes mounting rails, module clamps, roof hooks, standing seam clamps, and complete system solutions such as LEICHTmount, GreenLight, Delta Concrete, and the ELS facade system, supported by planning tools, a material calculator, and a B2B online shop.

Product overview

S:FLEX GmbH is a German manufacturer of photovoltaic mounting systems offering a comprehensive portfolio of mounting solutions for various installation types. The product range includes pitched roof systems (roof hooks, mounting rails ST-AK series with click technology, module clamps), flat roof systems (LEICHTmount RAIL 2.1, LEICHTmount SNAP, Triangle Delta AK II, GreenLight with drainage trays), facade systems (ELS), open ground systems (Delta Concrete), carports, and balcony systems (balcony set basic). The component portfolio encompasses mounting rails in multiple profiles (ST-AK 5/40, ST-AK 7/47, ST-AK 13/60, ST-AK 26/70), various clamps (standing seam clamps, module clamps AK/HK series), ground/ballast systems, trapezoidal sheet metal rails, high bead rails, fastening elements (hanger bolts, solar fasteners, screws), splice connectors, grounding components, and accessories. The company provides supporting services including a web-based planning tool, material calculator, online shop, and document server. Products are characterized by lightweight aluminum construction, click technology for quick installation, and UV-resistant materials. Manufacturing is based in Germany with ISO 9001 certification.

Differentiator

Problem solved

Functional benefit

Brands

• LEICHTmount: Flat roof mounting system product line
• GreenLight
• Delta Concrete
• ELS

Products and services

• sflex roof hooks Adjustable roof hooks for pitched roofs combining maximum load-bearing capacity with low weight, available in aluminum, hybrid, and plain tile variants for various roof types; sold to solar installers and PV planners.
• sflex groundmount box Ground-mounted PV mounting system for open ground installations; sold to solar installers and project planners.
• sflex greenlight Flat roof mounting system featuring a drainage tray with water storage capacity of 39.5L made from recycled HDPE, with various inclination angle options (Knickfix 10°/15°/20°); sold to solar installers.
• sflex balcony set basic PV fastening system for balcony parapets with adjustable tilt angles of 30°, 35°, 40°, 45° or 50° in high-quality aluminum construction for durability under wind and snow loads; sold to installers of balcony solar systems.
• sflex ELS facade system Facade mounting system for building-integrated photovoltaics including ELS rail, fix clamp, cross adapter clamp, eaves cladding, and side cladding for comprehensive facade installations; sold to installers and facade integrators.
• sflex carport double Solar carport system providing covered parking with integrated PV mounting for dual-parked vehicles; sold to commercial customers and installers.
• LEICHTmount RAIL 2.1 system Flat roof mounting system with floor rails, base plates, and tower components featuring wide base plates for even load distribution and click-in tower assembly; sold to commercial installers.
• LEICHTmount SNAP system

Segments3 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

Two partnerships are on record, tiered core.

• ALUMEROcoreStrategic or Co-development Partner · 11 May 2026Strategic alliance with ALUMERO (Production & Development) forming next mounting GmbH. ALUMERO serves as the industrial workbench and system provider with decades of manufacturing experience. The partnership combines production strength with market proximity and enables metagreen sustainability concept - manufacturing from recycled aluminum at European locations.
• next mounting GmbHcoreStrategic or Co-development Partner · 11 May 2026Joint venture company formed by ALUMERO and S:FLEX to serve large retail customers and OEM partners. Led by Maria Stefanidou (Sales Director) and Bernd Rombach (COO). Focuses on structured, fast, and reliable service through broad system portfolio and direct customer relationships.

Scale indicators3 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• PVHardware (PVH): European manufacturer of solar trackers and fixed-tilt ground-mount structures for utility-scale projects. Comparable on the open-ground / tracker sub-segment of S:FLEX's portfolio, though more utility-scale focused.
• Mounting Systems GmbH: German PV mounting system maker specializing in pitched-roof, flat-roof, and ground-mount solutions. Closely comparable to S:FLEX in product breadth, materials (aluminum/steel), and European installer channel.
• Renusol: European PV mounting manufacturer offering pitched-roof, flat-roof, and ground-mount systems. Direct peer on category, customer base, and geographic exposure.
• Aerocompact: Austrian manufacturer of PV mounting systems with flat-roof, pitched-roof, and ground-mount portfolios. Comparable to S:FLEX on product category, European footprint, and installer/distributor GTM.
• Schletter Group: German manufacturer of solar mounting systems for rooftops, ground-mount, and carport applications. Directly comparable to S:FLEX across product lines, installer-channel GTM, and German/European market focus.
• K2 Systems: German-based manufacturer of PV mounting systems for pitched roofs, flat roofs, and ground-mount applications. Closely comparable to S:FLEX on product category, customer base (installers), and European mid-market positioning.
• Novotegra (BayWa r.e.): German PV mounting brand (part of BayWa r.e.) offering pitched-roof, flat-roof, and ground-mount systems. Comparable product breadth and European installer channel; benefits from BayWa distribution scale.

Emerging players

• CWF (Customized Weather Flex): German flat-roof PV mounting system specialist with aerodynamic ballast systems. Comparable to S:FLEX's LEICHTmount and GreenLight flat-roof lines on product category and target customers.

Broad incumbents

• Esdec: Larger European PV mounting group (ClickFit, FlatFix, MountX product lines) with multi-country operations. Comparable product portfolio but broader geographic reach and larger scale than S:FLEX.

Others

• ALUMERO: European solar aluminum components manufacturer and S:FLEX's strategic alliance partner (parent of next mounting GmbH). Comparable as an adjacent/enabling supplier and now a cooperative partner rather than pure competitor.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 S:FLEX