What SL Rack does

SL Rack GmbH is a privately held German manufacturer of photovoltaic (PV) mounting systems, founded in 2006 and headquartered in Haag i. OB, Bavaria. The company designs, produces, and distributes modular aluminum and galvanized-steel Unterkonstruktionen (substructures) covering the full installation surface area — pitched roofs, flat roofs, ground-mounted open-space arrays, building facades, carports, and emerging Agri-PV applications such as the single-axis SL Tracker and vertical SL Agri Wall. Its portfolio includes the flagship D-Platte roof replacement panel (patent-pending), the RAIL family of support profiles up to RAIL 120, Innenverbinder/RAIL 2.0 and Außenverbinder/RAIL 3.0 connectors, SL Fast Flat pre-assembled flat-roof frames, and a wide accessory range (clamps, snow guards, lightning protection, end caps). All products carry DIN ISO 9001 and EN 1090 certification, with tested lightning current carrying capacity and general building authority approval (allgemeine bauaufsichtliche Zulassung) on key connectors, and the design philosophy emphasizes a five-component modular building block system for fast, tool-light installation.

The business is hardware sales of mounting components, with revenue generated one-time per project from installers, EPCs, and PV/electrical wholesale distributors, supplemented by a multi-currency e-commerce shop (sl-rack.shop) for direct component reorders. SL Rack runs an enterprise field-sales motion through twelve regional sales representatives covering Germany, Austria, Switzerland, the UK & Ireland, France, Italy, Greece/Balkan, and the Middle East/North Africa, backed by a seven-person internal sales team, technical sales specialists for roof and ground-mounted systems, and a wholly-owned Spanish branch. Go-to-market is augmented by active participation in the Solar & Storage Live trade show series across four countries plus GET NORD Hamburg, free proprietary planning tools (SL Planner and Solar.Pro.Tool), and downloadable technical documentation. The company operates with 51-100 employees, is led by Managing Director Ludwig Schletter with a leadership team including a Sales Director (Benjamin Ball), COO (Georg Bauer), and Head of Inside Sales (Silke Weiß-Kalb), and holds no disclosed external funding.

Name

SL Rack

Legal name

SL Rack GmbH

Website

https://sl-rack.com

Company type

Private

Founded year

2006

Operating status

Operating

Headcount range

51–100 employees

Short description

SL Rack GmbH is a privately held German manufacturer of modular photovoltaic mounting systems — including pitched-roof, flat-roof, ground-mounted, facade, and Agri-PV solutions — sold primarily to solar installers, EPCs, and PV wholesalers across Europe and MENA via field sales, wholesale, and e-commerce channels.

Ownership category

akta.pro rank

Product category

Solar Mounting Systems

NAICS

Hardware Manufacturing (33251)

akta.pro primary industry

Roof-Mounted Systems Integration (PV, Green Roofs, Roof Gardens, Snow Guards) (IMAFAMAI)

akta.pro secondary industry

Solar Roofing & Roof-Mounted PV Systems (IMADAFAO)

Keywords

• Solar mounting systems
• Photovoltaic racking
• Flat roof PV mounting
• Pitched roof solar
• Agri-PV mounting

Headquarters

HQ city

Haag In Oberbayern

HQ country

Germany

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Photovoltaic Mounting Systems and Components: SL Rack generates revenue through the sale of mounting systems and components for photovoltaic installations. Product categories include: pitched roof systems (Schrägdach), flat roof systems (Flachdach), open-space/freeland systems (Freifläche), facade systems (Fassade), carport systems, and Agri-PV systems. Components include rails, clamps, connectors, roof hooks, replacement plates, and accessories. Revenue is one-time, transaction-based for hardware components, with repeat purchases from installers and distributors.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels6 records

Core offering

SL Rack manufactures and sells mounting systems (Unterkonstruktionen) and substructures for photovoltaic installations across pitched roofs, flat roofs, ground mounts, facades, carports, and Agri-PV applications. The company produces aluminum and galvanized steel components engineered as a modular click system for fast, tool-light assembly, and distributes them through field sales, an online shop, and wholesale partners to professional installers.

Product overview

SL Rack is a German manufacturer of mounting systems (photovoltaic Unterkonstruktionen) for solar panel installations. The product portfolio comprises several interconnected mounting system families: (1) Schrägdach (pitched roof) systems including D-Platte roof replacement panels, RAIL support rails (RAIL 7-120), Mittel- und Endklemmen module clamps, Innenverbinder and Außenverbinder rail connectors, and accessories like Schneefang snow guards and Blitzschutzklemme lightning protection clamps; (2) Flachdach (flat roof) systems featuring the SL Fast Flat system with Basic Frame 1H, Windschottblech wind deflectors, Viertelpunktstrebe quarter-point struts, and supporting accessories; (3) Freifläche (ground-mounted) systems with W-Rammprofil ram profiles in plastic and steel variants, and various structural components; (4) Fassade (facade) systems centered on the SL Energy Wall for building-integrated PV; (5) Carport systems; and (6) Agri-PV solutions including the SL Tracker sun tracker and SL Agri Wall vertical mounting system. The company also offers SL Planner and Solar.Pro.Tool as proprietary planning tools. All products are designed for easy, fast, and safe installation with a modular kit system.

Differentiator

Problem solved

Functional benefit

Products and services

• SL Fast Flat System A flat-roof photovoltaic mounting system based on the company's plate technology, designed for fast installation and ballast-based fixing without roof penetration. Sold to professional PV installers and EPC contractors.
• SL Energy Wall A facade / wall-mounted PV racking system for installing photovoltaic modules on building facades. Sold to installers and facade-integrated solar projects.
• SL Tracker A single-axis solar tracker for ground-mounted photovoltaic installations that follows the sun to increase yield. Sold to ground-mount PV project developers and EPC firms.
• SL Agri-PV System
• SL Carport System A solar carport / canopy mounting system that supports PV modules above parking areas. Sold to commercial property owners, installers, and EPC contractors.
• Pitched-roof PV mounting systems Roof-hooks and rail-based mounting kits for installing PV modules on pitched tile and metal roofs. Sold to residential and commercial PV installers.
• SL Ground-mount / open-land racking Ramming-post based ground-mount racking systems for utility-scale and commercial open-field PV projects. Sold to ground-mount PV project developers and EPC firms.

Quantifiable outcome

• Module assembly with only five components
• +2 more outcomes

Named customers2 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature10 records

Partnerships

One partnership is on record.

• Landesamt für Denkmalpflege (Bavarian State Office for Heritage Preservation)minorStrategic or Co-development PartnerCollaborative partnership for heritage-compatible PV installations. For projects in ensemble protection areas, SL Rack works with the heritage office to develop customized solutions using red PV modules and color-matched mounting systems that meet both technical efficiency and heritage preservation requirements.

Scale indicators2 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Schletter Group: Schletter Group is a leading global manufacturer of solar mounting systems for pitched roofs, flat roofs, and ground-mounted installations. Direct competitor to SL Rack across the same product categories and customer base (PV installers, EPCs, and wholesale distributors) in Europe and globally.
• Esdec: Esdec is a Dutch manufacturer of professional PV mounting systems with strong focus on pitched and flat roof installations across Europe and North America. Competes directly with SL Rack on installer-focused flat roof and pitched roof solutions with comparable product modularity.
• Aerocompact: Aerocompact specializes in aerodynamic flat-roof PV mounting systems with low-ballast designs. Direct competitor to SL Rack's SL Fast Flat and Flachdach Generation 2.0 lines in the European commercial flat-roof solar segment with comparable installer targeting.
• S:FLEX: S:FLEX is a German manufacturer of PV mounting systems with strong focus on flat-roof and ground-mounted solutions. Direct peer to SL Rack in the German market with overlapping installer customer base and similar product architecture across roof segments.
• Mounting Systems: Mounting Systems GmbH manufactures PV mounting structures for pitched, flat, and ground-mounted solar installations. Closely comparable to SL Rack in product range, German-headquartered footprint, and target EPC/installer customer segments.
• Renusol: Renusol is a European PV mounting manufacturer offering systems for pitched roofs, flat roofs, and ground-mounted projects. Direct peer to SL Rack in the same product categories with overlapping installer and EPC customer base across DACH and broader Europe.
• Sun Ballast: Sun Ballast is an Italian manufacturer specializing in ballast-based flat-roof PV mounting systems. Directly competes with SL Rack's flat-roof product lines, particularly in Southern European markets including Italy where SL Rack has dedicated field sales presence.
• K2 Systems: K2 Systems is one of Europe's largest PV mounting system manufacturers with broad product coverage spanning pitched roofs, flat roofs, and ground-mount. Directly comparable to SL Rack in product architecture, installer customer base, and DACH market positioning.

Broad incumbents

• Hilti: Hilti is a global broad-line manufacturer of fastening and anchoring solutions for construction. While not focused on PV mounting, Hilti supplies fastening products to solar installers and represents a potential expansion incumbent that could move into integrated solar mounting hardware from its broader construction fastening base.
• Kingspan Group: Kingspan is a global building envelope manufacturer with insulated panel and rooftop solutions that overlap with PV mounting on commercial flat roofs. Represents a broader incumbent with the scale and balance sheet to expand into integrated solar roofing systems as building-integrated PV demand grows.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/sl-rack

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries1 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 SL Rack