ASG Engineering

What ASG Engineering does

ASG Engineering GmbH is a privately held German photovoltaic engineering company founded in 2007 and headquartered in Köthen, Saxony-Anhalt. The company plans, builds, and operates large-scale solar parks — both free-field installations and rooftop systems — for private land owners, commercial enterprises, municipalities, and other project developers across Saxony-Anhalt and five neighboring German states. Its service portfolio spans four integrated pillars: Planung (site assessment, engineering, permitting), Umsetzung (construction management and project execution), Betriebsführung (combined technical and commercial operations management including a 24/7 monitoring control room), and EZA-Regler & Schutz (certified distributed energy resource controllers and protection technology per VDE-AR-N 4110 and 4120).

ASG generates revenue through a mix of one-time EPC project development and construction fees, recurring managed-services contracts for technical and commercial plant operations, professional services for EZA controller installation and protection technology, and electricity production income from owned or leased land. All contracts are bespoke and quote-based; no public pricing exists. The go-to-market is direct, relationship-driven sales: free site assessments, dedicated contact persons from day one, and referral flow from a long-standing financing partnership with UmweltBank AG. Minimum deal sizes start at 6,000 m² of roof surface or 3 hectares of open land for private owners, with lower thresholds (3,000 m² / 1 hectare) for municipalities. The company has realized more than 100 PV projects with over 50.7 MWp of installed capacity.

The business is operated by co-founders René Wollmerstädt and Jan Wecke alongside Managing Director Alexander Henze (since 2014). In 2023, ASG Engineering spun off ASG Energie AG (project development and financing) and ASG SolarInvest (investment participation) to separate core engineering operations from capital and investment activities. ASG Besitz- und Verwaltungsgesellschaft, founded in 2014, holds self-owned plant assets and provides commercial operations management.

Name

ASG Engineering

Legal name

ASG Engineering GmbH

Website

https://asg-solar.de

Company type

Private

Founded year

2007

Operating status

Operating

Headcount range

11–50 employees

Short description

ASG Engineering GmbH plans, builds, and operates large-scale photovoltaic solar parks for private land owners, commercial enterprises, municipalities, and project developers across Saxony-Anhalt and five neighboring German states, providing turnkey EPC services and long-term technical and commercial operations management.

Ownership category

akta.pro rank

Product category

Solar Energy EPC and Operations Management

NAICS

Solar Electric Power Generation (221114)

SIC

Services-Facilities Support Management Services (8744)

akta.pro primary industry

Solar EPC & Construction (Utility-Scale, Rooftop, Balance of System) (EUAMABAB)

akta.pro secondary industries

Utility-Scale PV Project Development & Permitting (EUACAGAA), Operations, Maintenance & Asset Management (O&M, Vegetation, Spares, SCADA) (EUACAGAH), Owner’s Engineering, Grid Interconnection & System Studies (PVsyst/Performance Modeling, Protection Studies) (EUACAGAG), Solar Roofing & Roof-Mounted PV Systems (IMADAFAO)

Keywords

• Solar project development
• Photovoltaic EPC services
• PV operations management
• Solar park construction
• Renewable energy engineering

Headquarters

HQ city

Koethen

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Solar Park Development & Sale: ASG Engineering plans, designs, and constructs turnkey solar park projects for customers. Revenue is generated through project development fees and the sale of completed PV systems.
2. Technical Plant Operations Management: Ongoing 24/7 monitoring, maintenance, repair, performance optimization, and reporting for PV plants under management contracts. Revenue is recurring based on contracted service fees.
3. Commercial Plant Operations Management: Commercial management including direct marketing of electricity, payment monitoring, tax documentation, insurance management, and financial reporting. ASG acts as the central interface for all stakeholders in plant operations.
4. Land Lease & Purchase: ASG leases or purchases conversion land, fallow land, and roof surfaces from landowners to install PV systems. Revenue is generated from electricity production and feed-in tariffs/direct marketing on owned or leased land.
5. EZA-Regler & Protection Technology Services: Planning, installation, commissioning, and maintenance of EZA controllers and protection technology for new and existing PV plants, including direct marketing integration.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels3 records

Core offering

ASG Engineering plans, constructs, and operates turnkey large-scale photovoltaic (PV) solar parks and rooftop PV systems on behalf of private land owners, commercial operators, municipalities, and project developers in Saxony-Anhalt and neighboring German states. Service pillars include planning, implementation, technical and commercial operations management, and grid code-compliant EZA controller and protection technology. The company handles site assessment, permitting, financing coordination, construction, grid connection, and long-term 24/7 monitoring as a single-source provider.

Product overview

ASG Engineering offers an integrated portfolio of photovoltaic (PV) services centered on the planning, construction, and operations management of large-scale solar installations. The core offering consists of four interconnected service pillars: Planung (Planning) for site assessment, engineering, and permitting; Umsetzung (Implementation) for construction management and project execution; Betriebsführung (Operations Management) combining technical monitoring with commercial administration; and EZA-Regler & Schutz (EZA Controller & Protection) providing specialized control and protection technology services. Together, these services enable ASG to deliver turnkey solar park projects from initial feasibility through long-term operational management.

Differentiator

Problem solved

Functional benefit

Products and services

• Planung (Planning) Planning services for photovoltaic systems covering site inspection, feasibility assessment, basic and detail engineering, permitting, risk analysis, and tendering — for private land owners, commercial operators, municipalities, and project developers in Saxony-Anhalt and neighboring German states.
• Umsetzung (Implementation) Construction management and project execution services including assembly documentation, quality control, construction management, logistics coordination, and existing-plant optimization for large-scale PV solar parks and rooftop installations.
• Betriebsführung (Operations Management) Combined technical and commercial operations management for solar PV plants: 24/7 monitoring via a staffed operations center, maintenance and repair coordination, performance optimization, variance analysis reporting, direct marketing of electricity, payment monitoring, tax documentation, insurance management, and financial reporting under multi-year management contracts.
• EZA-Regler & Schutz (EZA Controller & Protection) Specialized grid code-compliant controller and protection technology services for PV plants: planning, installation, commissioning with bit/signal tests, modernization, certified controllers per VDE-AR-N 4110 and 4120, direct marketing interface, active/reactive power control, selectivity coordination, and full documentation for grid operator and certifier acceptance.

Quantifiable outcome

• Over 100 PV plants successfully developed and operated since 2007
• +4 more outcomes

Named customers4 records

Segments2 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Three partnerships are on record, tiered core, major and minor.

• ASG Besitz- und Verwaltungsgesellschaft mbHcoreStrategic or Co-development PartnerRelated entity that operates plants in ASG's own portfolio and handles commercial plant management and administration. Managed by René Wollmerstädt and Jan Wecke. This entity is the owner/operator of ASG's self-owned solar assets and provides kaufmännische (commercial) operations management.
• ASG Energie AGmajorStrategic or Co-development PartnerRelated entity focused on project development, financing, and investment participation. Spin-off from ASG Engineering in 2023. ASG Energie AG (https://asg-energie.de) was established as part of the 2023 spin-off alongside ASG SolarInvest.
• KUKUKK Kollektiv BerlinminorOthersKUKUKK Kollektiv Berlin is a design collective that provides website layout and design services for ASG Engineering. Listed in the privacy policy and imprint as the layout and design provider.

Scale indicators6 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• GP JOULE: GP JOULE is a German renewable energy company covering wind, solar, hydrogen, and e-mobility with project development, EPC, and operations. Directly comparable to ASG Engineering on German PV project development, EPC delivery, and long-term operations management for utility-scale solar parks.
• IBC Solar: IBC Solar is a long-established German PV system integrator active in both rooftop and utility-scale PV EPC with international operations. Directly comparable to ASG Engineering on PV project development, EPC delivery, and a similar German SME-to-mid-market customer base including landowners and commercial operators.
• Enerparc: Enerparc is a German solar EPC and operations management specialist headquartered in Hamburg, building utility-scale PV parks across Europe. Highly comparable to ASG Engineering's integrated EPC plus technical Betriebsführung model and target customer base of landowners, municipalities, and developers.
• juwi: juwi is a leading German renewable energy project developer and EPC contractor covering wind, solar, and hybrid projects nationwide. Directly comparable to ASG Engineering as a German-headquartered PV project developer/EPC operating across multiple federal states with end-to-end planning, construction, and operations services.
• 7C Solarparken: 7C Solarparken is a German solar IPP operating a portfolio of utility-scale PV parks with technical and commercial operations management. Closely comparable to ASG Engineering's recurring Betriebsführung and direct-marketing model applied to an owned/operated solar portfolio across Germany.
• ABO Wind: ABO Wind is a German renewable energy project developer with deep wind and growing solar development, EPC, and operations activities. Directly comparable to ASG Engineering as a German project developer-EPC targeting landowners and municipalities with utility-scale renewable project pipelines.
• MaxSolar GmbH: MaxSolar is a Bavarian/German PV EPC and project developer focused on utility-scale solar parks and operations management for landowners, municipalities, and commercial customers. Closely comparable to ASG Engineering on regional German utility-scale PV development plus recurring O&M.

Broad incumbents

• Solarwatt GmbH: Solarwatt is a German PV company primarily known for residential and commercial rooftop PV plus battery storage with broader operations. Comparable to ASG Engineering's rooftop PV and integrated offering, but tilted toward smaller-scale residential/C&I rather than ASG's utility-scale focus.
• Encavis AG: Encavis is a German-listed independent power producer operating a large portfolio of solar and wind parks across Europe with in-house technical operations management. Comparable to the operating-asset and Betriebsführung side of ASG Engineering, but at much larger scale and with public-market capital access.
• BayWa r.e. BayWa r.e. is a large German-headquartered renewable energy developer, EPC, and IPP active in solar, wind, and storage globally. Overlaps with ASG Engineering on utility-scale PV project development, EPC, and O&M, but operates as a much broader, international incumbent rather than a regional specialist.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/asg-engineering-gmbh

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 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 ASG Engineering