Wattner
Wattner is a Cologne-based developer and operator of ground-mounted solar parks in Germany, managing 110+ parks (~800 MW), and offering EEG-guaranteed feed-in assets, SunAsset subordinated-loan investment products, and corporate PPA and green-electricity services to landowners, municipalities, private investors, and corporate buyers.
- Company typePrivate
- Founded2004
- HeadquartersKöln, Germany
- Headcount11–50
- GTM typeB2B
- OfferingServices
What Wattner does
Wattner Aktiengesellschaft is a Cologne-based developer, builder, and operator of ground-mounted solar parks (Freiflächen-Photovoltaikanlagen) in Germany, operating under the brand "Die Energiedesigner." The company has realized more than 110 solar parks with approximately 800 MW of installed capacity and 1.7 million solar modules, and operates roughly 378 MW of third-party capacity under management. Its core product set is the "Energiedesign" stack: solar parks, battery storage, infrastructure (grid connections, cable routes, access roads), and long-term land management delivered as an integrated package.
The business operates three monetisation tracks. First, revenue from EEG-guaranteed feed-in tariffs on its own portfolio, fixed for 20 years from commissioning. Second, a public investment-product franchise under the SunAsset brand (SunAsset 1 through 10), structured as qualified subordinated loans (Nachrangdarlehen / Vermögensanlagen) that place private-investor capital into operating solar parks, with SunAsset 9 (2019) raising €35.3M and SunAsset 10 (2020) raising €41.3M; more recent park-level offerings such as Bergzow (17 MWp, operational September 2025) are distributed through crowdfunding partner Grüne Sachwerte. Third, a corporate "Energielösungen" line covering Power Purchase Agreements, green electricity certificates (Grünstromzertifikate), and electricity trading (Stromhandel), sold directly to corporate buyers. The customer base spans landowners, farmers, municipalities, project developers, private investors, and corporate offtakers, with go-to-market executed through direct B2B sales for project development and channel partners for retail investment distribution. Founding managing directors Ulrich Uhlenhut and Guido Ingwer have led the company since 2004, supported by a team of approximately 70 employees.
Wattner firmographics
Firmographics- Name
- Wattner
- Legal name
- Wattner Aktiengesellschaft
- Website
- https://wattner.de
- Company type
- Private
- Founded year
- 2004
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Wattner is a Cologne-based developer and operator of ground-mounted solar parks in Germany, managing 110+ parks (~800 MW), and offering EEG-guaranteed feed-in assets, SunAsset subordinated-loan investment products, and corporate PPA and green-electricity services to landowners, municipalities, private investors, and corporate buyers.
- Ownership category
- akta.pro rank
Wattner industry classification
Industry- Product category
- Solar Energy Development
- NAICS
- Solar Electric Power Generation (221114), Electric Power Generation (22111)
- SIC
- Electric Services (4911), Electric & Other Services Combined (4931)
- akta.pro primary industry
- PV Balance of System (BOS) & Electrical Infrastructure (Inverters, Transformers, Cabling, Substations) (EUACAGAC)
- akta.pro secondary industries
- Solar Financing, Leasing & Ownership Platforms (Tax Equity, PPA, Securitization) (EUAMABAJ), Solar EPC & Construction (Utility-Scale, Rooftop, Balance of System) (EUAMABAB)
Keywords
Where Wattner is headquartered
LocationHeadquarters
- HQ city
- Köln
- HQ country
- Germany
- HQ region
- Europe
Offices1 record
Markets served
Wattner business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Infrastructure, Marketing or Sales, Supply Chain, Technology or R&D
Revenue model
- EEG Feed-in Tariffs: Revenue from legally guaranteed feed-in tariffs under the German Renewable Energy Sources Act (EEG) for electricity produced by solar parks. Tariffs are fixed for 20 years from commissioning.
- Investment Products (Vermögensanlagen): Public investment offerings (Nachrangdarlehen/subordinated loans) for private investors. SunAsset 1-10 have been successfully placed. Revenue from capital raised minus distributions to investors.
- Power Purchase Agreements (PPA): Long-term electricity supply contracts with businesses at fixed prices, creating predictable revenue streams.
- Green Electricity Certificates: Herkunftsnachweise (origin guarantees) for sustainability strategies, flexibly combinable with direct supply, grid power, and PPA.
- Electricity Trading: Market-oriented trading of electricity with individual strategies for maximum impact.
- Solar Park Operation and Management: Technical operation and management services for solar parks, including approximately 378 MW of installed capacity under management.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| One time/ perpetual license | Pay-as-you-go | Wattner Solarkraftwerk Bergzow crowdfunding - minimum 500 EUR |
| Subscription | Annual | Wattner SunAsset 9 - minimum 5,000 EUR |
| Subscription | Annual | Wattner SunAsset 10 - minimum 5,000 EUR |
| Subscription | Annual | Upcoming: Wattner Solarkraftwerk Zahna |
Go-to-market motion2 records
Distribution channels5 records
Marketing channels5 records
Wattner product offering
Product offeringCore offering
Wattner develops, builds, and operates ground-mounted solar parks (Freiflächen-Solarparks) across Germany under its "Energiedesign" approach, bundling solar generation, battery storage, infrastructure, and long-term land management into an integrated offering. The company has realized over 110 solar parks with approximately 800 MW of installed capacity and 1.7 million solar modules, generating revenue primarily through EEG-guaranteed 20-year fixed feed-in tariffs. It complements this core with structured subordinated loan investment products (SunAsset 1-10 and crowdfunding offerings) for private investors, and corporate energy solutions including Power Purchase Agreements (PPAs), green electricity certificates, and electricity trading.
Product overview
Wattner is an 'Energiedesigner' (energy designer) company based in Cologne, Germany, offering a comprehensive portfolio of solar energy products and investment solutions. The core offering consists of developing, building, and operating ground-mounted solar parks (Solarparks/Freiflächen-Photovoltaikanlagen) across Germany, with over 110 projects realized and approximately 800 MW installed capacity. Complementing the core solar infrastructure business, Wattner provides battery storage solutions (Batteriespeicher), infrastructure services, and long-term land management. For investors, Wattner offers structured investment products under the SunAsset brand (SunAsset 1-10), which are qualified subordinated loan offerings (Vermögensanlagen) enabling participation in revenues from operational German solar parks with EEG-guaranteed feed-in tariffs. The company also provides energy solutions including Power Purchase Agreements (PPAs), green electricity certificates (Grünstromzertifikate), and electricity trading (Stromhandel) services. Recent crowdfunding offerings through platforms like Grüne Sachwerte have provided additional investment access to specific solar park projects such as Bergzow and Zahna.
Differentiator
Problem solved
Functional benefit
Brands
- SunAsset: Series of investment products (SunAsset 1-10) offering subordinated loans for investment in operating German solar parks with guaranteed EEG feed-in tariffs.
- Wattner Solarkraftwerk
Products and services
- Solarparks (Ground-Mounted Solar Parks) Ground-mounted solar parks (Freiflächen-Photovoltaikanlagen) developed, built, and operated by Wattner across Germany under EEG-guaranteed 20-year fixed feed-in tariffs. Wattner has realized over 110 solar parks with approximately 800 MW of installed capacity and 1.7 million solar modules, sold to landowners, municipalities, project developers, and the broader energy market via EEG feed-in tariffs.
- Battery Storage Systems (Batteriespeicher) Battery storage solutions integrated with Wattner's solar parks, making green electricity available when needed, contributing to grid stability, supply security, and storage linked to where the energy is generated. Targeted at grid operators and energy market participants.
- Solar Park Infrastructure Services Infrastructure services for solar parks including access roads, cable routes, and grid connections, planned from the outset and implemented with experience and regulatory approval, sold alongside solar park development.
- Long-Term Land Management (Flächenverwaltung) Long-term land management services for solar parks from initial concept to end of operational life, providing fair, transparent, and reliable partnership for property owners and municipalities throughout the 20–30 year lease period.
- Power Purchase Agreements (PPA) Long-term electricity supply contracts with fixed prices that connect companies directly and predictably with clean energy, with customizable terms and conditions for long-term planning and investments; sold to corporate energy buyers seeking renewable energy supply.
- Green Electricity Certificates (Grünstromzertifikate / Herkunftsnachweise) Green electricity certificates (Herkunftsnachweise / origin guarantees) for sustainability strategies, flexibly combinable with direct supply, grid power, and PPAs, with efficient and targeted marketing of certificates; sold to corporate customers for ESG and sustainability reporting.
- Electricity Trading (Stromhandel) Electricity trading services with optimization strategies, market-oriented action, transparent pricing models, real-time data, and long-term partnerships for sustainable success; sold to corporate energy buyers and market participants.
- Wattner SunAsset 9 (Subordinated Loan Investment Product) An 11-year qualified subordinated loan investment product (Vermögensanlage) with minimum €5,000 entry, paying 4.0–4.5% fixed annual interest, backed by revenues from already operational German solar parks with EEG-guaranteed 20-year feed-in tariffs. Final subscription volume was €35,337,000. Targeted at private investors seeking stable, ESG-aligned returns.
- Wattner SunAsset 10 (Subordinated Loan Investment Product) A 12-year qualified subordinated loan investment product (Vermögensanlage) with minimum €5,000 entry, paying 3.4% p.a. for the first decade then 4.8% p.a. for the last two years (total projected return of 47%), backed by already operational German solar parks with EEG-guaranteed feed-in tariffs. Final subscription volume was €41,318,000. Targeted at private investors.
- Wattner Solarkraftwerk Bergzow (Crowdfunding Solar Park Investment) A crowdfunding subordinated loan (Nachrangdarlehen) investment product offering 5.0% annual interest over approximately 10.5 years with a minimum entry of €500, giving retail investors exposure to the already operational 17 MWp Solar Park Bergzow in Saxony-Anhalt (no construction risk). Distributed via channel partner Grüne Sachwerte. Targeted at private retail investors, including those with smaller ticket sizes than standard SunAsset placements.
Quantifiable outcome
- 86.1% surplus in 5 years for SunAsset 1 investors (first German solar fund)
- +4 more outcomes
Companies that use Wattner
Customer profileNamed customers3 records
Segments6 records
Ideal customer profiles5 records
Wattner technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
Wattner partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Grüne Sachwerte – Gesellschaft für ökologisches Investment mbHcoreGrüne Sachwerte serves as the sales/distribution partner for Wattner's crowdfunding offerings. They mediate investment products like Wattner Solarkraftwerk Bergzow to retail investors through their platform. The partnership enables access to a broader investor base for solar energy investments.
Scale indicators7 records
Recent moves6 records
Expansion highlights5 records
Wattner competitors and assessment
Company assessmentMarket position
Competitive moat4 records
Key risks6 records
Key highlights7 records
Customer concentration
Wattner social profiles
Digital presenceWattner financial estimates
Financial estimateRevenue estimate
Valuation estimate
Wattner leadership team
Management profileNumber of profiles
Profiles4 records
Wattner funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Wattner M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Wattner
What does Wattner do?
Wattner develops, builds, and operates ground-mounted solar parks (Freiflächen-Solarparks) across Germany under its "Energiedesign" approach, bundling solar generation, battery storage, infrastructure, and long-term land management into an integrated offering. The company has realized over 110 solar parks with approximately 800 MW of installed capacity and 1.7 million solar modules, generating revenue primarily through EEG-guaranteed 20-year fixed feed-in tariffs. It complements this core with structured subordinated loan investment products (SunAsset 1-10 and crowdfunding offerings) for private investors, and corporate energy solutions including Power Purchase Agreements (PPAs), green electricity certificates, and electricity trading.
Is Wattner a public or private company?
Wattner is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Wattner founded?
Wattner was founded in 2004. It employs 11 to 50 people.
Where is Wattner based?
Wattner is headquartered in Köln, Germany, in the Europe region.
How does Wattner make money?
Six revenue lines are on record. EEG Feed-in Tariffs are the primary driver. The others are investment Products (Vermögensanlagen), power Purchase Agreements (PPA), green Electricity Certificates, electricity Trading and solar Park Operation and Management.
Does Wattner have an API?
No public API is recorded for Wattner.
What industry is Wattner in?
Wattner's product category is Solar Energy Development. Its primary akta.pro industry code is EUACAGAC, PV Balance of System (BOS) & Electrical Infrastructure (Inverters, Transformers, Cabling, Substations), with a secondary code of EUAMABAJ, Solar Financing, Leasing & Ownership Platforms (Tax Equity, PPA, Securitization). Its NAICS code is 221114 and its SIC code is 4911.