What GERES Group does

GERES Group (legal entity: GERES Umwelt Management GmbH) is a family-owned German renewable energy project developer and Independent Power Producer (IPP) founded in 1995 by Norbert Wiemann and Carmen Wiemann in Frankfurt am Main. The company's core business is the full-lifecycle development of onshore wind farms in Germany — from site evaluation, feasibility studies, environmental impact assessments, and permitting through construction and long-term operation — supplemented by international solar/PV project development. As an IPP, GERES retains developed wind parks in its own portfolio for ongoing electricity generation, while international solar projects are typically developed and sold to third parties. The company currently operates 143 MW of wind capacity, has 200+ MW of projects planned and approved in Germany, and has realized 50+ MW of photovoltaic capacity internationally, including an 8.7 MW flagship project in Spain. It supports its generation assets with four proprietary substations for grid feed-in and maintains a long-standing exclusive turbine supply partnership with Enercon (Aurich, Germany).

The business model is multi-stream: (1) long-term electricity feed-in revenue from owned wind assets under the German EEG framework, (2) one-time project sale revenue from international solar developments, and (3) land lease payments and community participation income flowing to municipalities and landowners. GERES serves local communities and landowners as its primary stakeholders, structuring participation models that deliver lease and tax revenue to rural municipalities — a model recognized by the 'Faire Windenergie' seal awarded in 2020. The go-to-market is enterprise field sales and direct community engagement, with no digital marketing or self-service channels. The corporate structure comprises approximately 20 wholly-owned subsidiaries organized by function (Power, Energiesysteme, Wind Power, Project Management) and geography, including four US entities (GERES Energy Inc, Alpha Energy LLC, Zeta Energy LLC, Zeta Assets LLC) operating in Delaware, Kansas, and Wyoming, indicating an active — though not yet large-scale — US market presence.

Name

GERES Group

Legal name

GERES Umwelt Management GmbH

Website

https://geres-group.com

Company type

Private

Founded year

1995

Operating status

Operating

Headcount range

1–10 employees

Short description

Family-owned German renewable energy developer and Independent Power Producer operating 143+ MW of onshore wind capacity domestically and developing solar/PV projects internationally, including in Spain and the United States.

Ownership category

akta.pro rank

Product category

Renewable Energy Project Development

NAICS

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

SIC

Electric Services (4911)

akta.pro primary industry

Wind Farm Ownership & Operations (IPP/Utility-Owned Asset Operations) (EUACAFAF)

akta.pro secondary industries

Wind Farm Development & Permitting (Greenfield/Brownfield) (EUACAFAE), Development-Stage M&A & Portfolio Acquisition (Early-Stage/Ready-to-Build) (EUAMAAAF), Wind Power Plant EPC (Onshore/Offshore) (EUAEAAAF), Wind Operations, Maintenance & Asset Management (Scheduled/Unscheduled) (EUAMACAH), Solar Project Development & IPP (Utility-Scale & Rooftop) (EUAMABAA), Greenfield Site Origination & Land Acquisition (Leases, Easements, Title) (EUAMAAAA), Development Management & Owner’s Engineering (Design Basis, Yield, Technical Due Diligence) (EUAMAAAG)

Keywords

• Onshore wind development
• Solar project development
• Renewable energy projects
• Wind farm operations
• Photovoltaic installations

Headquarters

HQ city

Frankfurt am Main

HQ country

Germany

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Marketing or Sales, Technology or R&D, Others

Revenue model

1. Wind Energy Project Development and Operation: GERES develops, constructs, and operates onshore wind farms as an Independent Power Producer (IPP). The company retains ownership of wind parks in their portfolio for long-term electricity generation and feed-in revenue.
2. Solar/PV Project Development: International solar farm development including site evaluation, feasibility studies, permitting, and grid connection. Projects are planned and sold to third parties, including the 8.7 MW flagship project in Spain.
3. Land Lease and Community Participation: Revenue generation through land lease payments and community participation models, providing long-term income from lease and tax revenues to local municipalities and communities.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

GERES Group develops, constructs, and operates onshore wind farms in Germany as an Independent Power Producer (IPP), currently running over 143 MW of wind capacity and owning more than 150 MW of wind assets. The company also plans, develops, and sells large-scale open-air photovoltaic (solar) installations internationally, having realized over 50 MW of PV capacity. Services span the full project lifecycle: site evaluation, feasibility studies, environmental assessments, permitting, grid connection, construction, and ongoing operation, with revenue from electricity feed-in, project sales, and land lease/community participation arrangements.

Product overview

GERES Group is a family-owned renewable energy project developer offering integrated services for onshore wind farms and photovoltaic/solar installations. The company operates a unified service model covering the entire project lifecycle from site evaluation and feasibility studies through permitting, construction, and long-term operation. As an Independent Power Producer (IPP), GERES retains wind farms in its own portfolio after construction. The Wind Energy Projects and Photovoltaic Projects form the two core product lines, supported by proprietary substations (Umspannwerke) that enable optimal grid integration. The company partners exclusively with Enercon for wind turbine technology and serves markets in Germany and internationally.

Differentiator

Problem solved

Functional benefit

Products and services

• Onshore Wind Energy Projects End-to-end development, construction, and operation of onshore wind farms in Germany as an Independent Power Producer (IPP). Includes site evaluation, feasibility studies, environmental impact assessments, land lease agreements, permitting, construction, and long-term operation with grid feed-in. Currently operates over 143 MW of installed wind capacity across multiple wind parks.
• Photovoltaic / Solar Energy Projects

Quantifiable outcome

• Over 200 MW of wind projects planned and approved in Germany
• +3 more outcomes

Segments2 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

One partnership is on record.

• EnerconcoreTechnology or IntegrationLongstanding strategic partnership with Enercon, the wind turbine manufacturer based in Aurich, Germany. Enercon supplies wind energy systems for GERES wind farms, ensuring maximum quality, reliability, and profitability. This partnership enables GERES to achieve high efficiency with low emissions and minimal wear on their wind energy installations.

Scale indicators9 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• wpd AG: wpd is a German-headquartered onshore and offshore wind developer and IPP with international operations. Its project development-to-IPP model in onshore wind directly mirrors GERES's business, including pipeline-to-asset conversion and European geographic focus.
• ENERTRAG: ENERTRAG is a German renewable energy company that develops, builds, and operates onshore wind farms as an IPP, with a similar integrated project-to-asset model. It is one of the closest direct comparables to GERES in terms of geography (DACH), product (onshore wind IPP), and lifecycle coverage.
• juwi AG: juwi is a German renewable energy project developer focusing on wind and solar PV project development, including own-operation. Its full-lifecycle renewable development model and DACH roots are directly comparable to GERES's positioning.
• ABO Wind AG: ABO Wind is a German-based renewable energy project developer with strong onshore wind and solar PV development operations in Germany and international markets. Like GERES, it runs a full-lifecycle development model and increasingly retains assets for own-operation, making it a direct peer.
• PNE AG: PNE AG is a German wind and solar project developer with operations across Europe, South Africa, and the US. Its onshore wind and PV development pipeline, plus IPP-style asset ownership, makes it a close comparable in scale and business model to GERES.

Broad incumbents

• Encavis AG: Encavis is a publicly listed German IPP and operator of solar and wind parks across Europe. As a larger-scale incumbent IPP in the same renewable segment, it competes with GERES for institutional capital and asset acquisitions, even though its portfolio is more solar-heavy.
• EDF Renewables: EDF Renewables is a global developer and IPP of wind and solar projects with significant operations in Europe and the US. It overlaps with GERES in both German onshore wind and US wind development, but at much larger scale and as part of the broader EDF group.
• NextEra Energy Resources: NextEra Energy Resources is the world's largest generator of wind and solar energy, with dominant US onshore wind operations. It represents the scale benchmark that GERES's US subsidiary ambitions would be measured against, though it operates at vastly greater scale and capital base.
• RWE Renewables: RWE Renewables is the green-power arm of RWE AG, one of Europe's largest renewable energy developers and IPPs in onshore and offshore wind. It is a broad incumbent competitor with far greater capital resources than GERES but overlapping German onshore wind exposure.

Others

• Enercon: Enercon is GERES's exclusive wind turbine supplier and a leading German direct-drive turbine OEM. Although not a direct competitor, Enercon is a critical ecosystem partner, and a deeper understanding of its product roadmap directly informs GERES's pipeline economics.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/geres-group

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries20 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 GERES Group