Solarcomplex

What Solarcomplex does

Solarcomplex AG is a citizen-owned, non-listed German stock corporation (AG) founded in 2000 and headquartered in Singen, Baden-Württemberg, that develops, builds, and operates renewable energy infrastructure across the Lake Constance region. Its portfolio spans rooftop and ground-mounted photovoltaic systems (single projects up to 16 MW at Döggingen and 6.2 MW rooftop at Zollern), wind parks (notably Windpark Länge at 34.2 MW under construction), and a network of district heating systems incorporating solar thermal, wood chips, biogas, and lake thermal energy (Seethermie), with the DiWa network (Dingelsdorf/Wallhausen, 16 km, 370 connections, 22 million EUR investment) being the largest. Technical differentiators include the proprietary 'Solarstrom Direkt' direct-PPA model delivering solar electricity to industrial rooftops below grid fee cost, absorption heat pumps recovering wood-chip boiler exhaust, and the company's first solar-plus-storage park combining 3.3 MW PV with 2.5 MW / 11 MWh battery near Rottweil.

The company operates a hybrid business model: (1) project development and EPC services for municipalities and utilities such as Elektrizitätswerke Schönau (EWS) where solarcomplex builds but does not own the asset, (2) long-term ownership and operation of its own plant portfolio generating recurring revenue from EEG feed-in tariffs, direct marketing, and corporate PPAs (e.g., 10-year PPA with Rolls-Royce Power Systems), and (3) capital participation products including shares (Aktien), profit participation certificates (Genussscheine at 2.5% fixed interest), and bearer debentures offered to a community of over 1,000 shareholders. Headcount stands at approximately 50 employees, the 2025 balance sheet total reached 128.3 million EUR (up from 104.6 million EUR in 2024), and pre-tax profit grew to 2.8 million EUR.

Solarcomplex serves four primary customer segments: commercial and industrial enterprises (Rolls-Royce, Constellium, Zollern) for direct PPA and rooftop PV; municipalities (Gottmadingen, Gailingen, Stadtwerke Konstanz) for public renewable energy infrastructure; energy companies (EWS Schönau) for EPC contracting; and citizens/retail investors for ecological investment products. Sales cycles are relationship-driven and regional, with project tendering, feasibility studies, and multi-year contracts. The company explicitly targets 100% renewable energy supply for the Lake Constance region by 2030 and has realized approximately 200 million EUR of cumulative project investment since 2000.

Name

Solarcomplex

Legal name

solarcomplex AG

Website

https://solarcomplex.de

Company type

Private

Founded year

2000

Operating status

Operating

Headcount range

11–50 employees

Short description

Solarcomplex AG is a citizen-owned German renewable energy company founded in 2000 that develops, builds, and operates solar parks, wind parks, and district heating networks across the Lake Constance region for municipalities, industrial enterprises, and energy utilities, while offering ecological investment products to over 1,000 shareholders.

Ownership category

akta.pro rank

Product category

Renewable Energy Project Development & Operation

NAICS

Solar Electric Power Generation (221114), Biomass Electric Power Generation (221117), Wind Electric Power Generation (221115)

SIC

Cogeneration Services & Small Power Producers (4991), Electric, Gas & Sanitary Services (4900)

akta.pro primary industry

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

akta.pro secondary industries

Renewable Distributed Generation (Rooftop/Onsite Solar, Small Wind, Small Hydro) (EUACALAJ), Distributed Generation (DG) Solar & Small Wind (EUAMAJAD), Solar Balance-of-Plant EPC (Piles/Foundations, Trenching, Combiner Networks) (EUAEADAJ)

Keywords

• Renewable energy development
• Solar park construction
• District heating networks
• Wind power projects
• Citizen energy investment

Headquarters

HQ city

Singen

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Energy Plant Operation: Solarcomplex operates its own portfolio of solar parks, wind parks, and district heating networks. Revenue is generated from selling electricity (via EEG feed-in tariffs, direct marketing, or corporate PPAs) and heat to end customers. Long-term plant ownership creates recurring revenue streams.
2. EPC / Project Development: Solarcomplex develops, plans, and builds solar parks and heating networks on behalf of municipalities, industrial companies, and energy companies (e.g., EWS Schönau, Gottmadingen municipality, Gailingen municipality). Revenue is earned as project fees or EPC contracts.
3. Capital Participation Products: Solarcomplex raises equity capital by issuing new shares, profit participation certificates (Genussscheine), and bearer bonds to citizens and investors. Proceeds fund the growing plant portfolio. Revenue is capital raised, not recurring, but repeated as growth financing rounds.

Pricing tiers

Go-to-market motion3 records

Distribution channels3 records

Marketing channels6 records

Core offering

Solarcomplex AG plans, builds, and operates renewable energy plants for electricity and heat generation, including rooftop and ground-mounted photovoltaic systems, wind parks, biogas facilities, and district heating networks. It also offers direct solar power supply (Solarstrom Direkt) to industrial customers via on-site PPAs, and enables citizen participation through shares, profit participation certificates (Genussscheine), and bearer debentures. The company serves as both project developer/EPC contractor and long-term plant operator in the Lake Constance region of Germany.

Product overview

Solarcomplex AG operates as a regional renewable energy company offering a comprehensive portfolio of products and services focused on solar, wind, and heating energy. The core product offerings include rooftop and ground-mounted photovoltaic systems (Photovoltaik Dachanlagen and Freilandanlagen), wind power installations (Windkraftanlagen), district heating networks (Wärmenetze/Nahwärmenetze) incorporating innovative technologies like lake thermal energy (Seethermie), and biogas plants (Biogasanlagen). The company also offers an innovative direct solar power model (Solarstrom Direkt) delivering solar electricity directly to industrial customers. Additionally, solarcomplex provides financial products for capital participation including profit participation certificates (Genussscheine), bearer debentures (Inhaberschuldverschreibung), and shares (Aktien) traded on their proprietary platform. The company has recently expanded into battery storage integrated with solar parks. Services include emergency heating support, meter reading, and infrastructure mapping. With over 20 years of experience since founding in 2000, solarcomplex has developed approximately 50+ MW of solar installations, multiple wind farms, around 20 heating networks, and offers citizen investment opportunities in renewable energy projects.

Differentiator

Problem solved

Functional benefit

Products and services

• Photovoltaik Dachanlagen (Rooftop PV Systems)

Quantifiable outcome

• 2025 annual result after tax, interest, and depreciation: 2.8 million EUR (Vorjahr 2.4 million EUR)
• +5 more outcomes

Named customers8 records

Segments4 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

Five partnerships are on record, tiered core and minor.

• Elektrizitätswerke Schönau (EWS) - Additional ProjectscoreStrategic or Co-development Partner · 13 November 2024EWS commissioned two additional solar parks in Niedereschach (Schwarzwald-Baar district) and Trichtingen (Rottweil district) with combined capacity of ~11 MW. Part of ongoing strategic partnership.
• Hegauwind GroupminorStrategic or Co-development Partner · 1 October 2024Solarcomplex is commissioned by Hegauwind Group for project development of Windpark Brand (3 × Nordex N-163 turbines). Solarcomplex holds a 1/11 stake in Windpark Verenafohren which it developed for Hegauwind.
• Elektrizitätswerke Schönau (EWS)coreStrategic or Co-development Partner · 3 April 2023EWS Schönau commissioned solarcomplex for multiple solar park projects: ~4 MW at Döggingen (2023), ~16 MW at Döggingen (2025), and two parks in Niedereschach and Trichtingen (~11 MW). EWS is a key recurring client and strategic partner in solar park development.
• Bundeskartellamt / Bundesamt für Justiz (Federal Agencies)minorOthers · 21 November 2022As a heat network operator, solarcomplex participates in government relief programs (Soforthilfe, Wärmepreisbremse) mandated by the German government. Customer billing automatically includes government-mandated price caps and subsidies.
• Rolls-Royce Power Systems (RRPS)coreStrategic or Co-development Partner · 7 June 2022Solarcomplex and Rolls-Royce Power Systems signed a 10-year corporate PPA for the Solar park Berghof (3.7 MW, ~4 million kWh/year). Rolls-Royce uses the solar power for its Friedrichshafen facility as part of its path to climate-neutral operations. This is a flagship direct PPA deal with a major industrial company.

Scale indicators10 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Green Planet Energy eG: Cooperative-owned renewable energy supplier in Germany (formerly Greenpeace Energy). Comparable to solarcomplex as a values-driven renewable energy provider with deep citizen/community ownership and direct marketing of renewable electricity to end customers.
• JUWI GmbH: One of Germany's largest wind and solar project developers and EPCs. Directly comparable to solarcomplex as a renewable energy developer covering utility-scale solar parks, wind farms, and increasingly storage — competing for the same municipal and industrial customers in southern Germany.
• IBC Solar AG: German solar EPC and project developer active in utility-scale and commercial rooftop PV. Directly comparable on the photovoltaic side of solarcomplex's business, with similar target customers in commercial and industrial segments and project-development capabilities.
• GP Joule: German integrated renewable energy developer covering wind, solar, biomass, and sector coupling (including heat and e-mobility). Highly comparable to solarcomplex's multi-technology renewables-plus-heating platform and serves similar municipal and commercial customers across Germany.
• Elektrizitätswerke Schönau (EWS): Citizen-owned German renewable energy utility. Overlaps with solarcomplex as both customer (EWS commissions solarcomplex for EPC) and competitor (EWS develops its own renewable assets). Both are regional, citizen-anchored renewable energy companies in Baden-Württemberg with similar mission and customer segments.
• Naturstrom AG: German independent renewable energy supplier with a focus on citizen participation. Operates its own wind and solar portfolio, supplies green electricity to households and businesses, and competes for similar eco-conscious customer and investor segments as solarcomplex.

Broad incumbents

• EnBW Energie Baden-Württemberg AG: Dominant integrated utility in Baden-Württemberg and a major developer of wind, solar, and grid infrastructure. While much larger and broader in scope, it is the principal incumbent competitor for municipal energy-transition mandates and renewable project tenders in solarcomplex's home region.

Regional players

• badenova AG & Co. KG: Regional energy utility headquartered in Freiburg, serving Baden and the Upper Rhine region. Comparable as a regional renewable energy operator in southern Germany with overlapping municipal and commercial customer segments, though larger and more diversified.
• Stadtwerke Konstanz GmbH: Municipal utility of Konstanz and shareholder/strategic partner of solarcomplex. Operates as a regional energy supplier with growing renewable generation; partly a customer and partly a competitor for municipal renewable projects in the Lake Constance area.

Emerging players

• Lichtblick SE: Hamburg-based green electricity and flexible-energy supplier with a strong citizen-engagement narrative. Comparable in mission (decentralized, citizen-friendly renewables) and in selling renewable power and flexibility services, though operating from a different region and with a different scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• Xxing.com/pages/solarcomplex-ag
• Facebookfacebook.com/solarcomplex
• LinkedInlinkedin.com/company/solarcomplex-ag

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 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 Solarcomplex