What Renergo Gmbh does

Renergo GmbH is a German project developer for renewable energy infrastructure, founded in 2021 (formal incorporation 2022) and headquartered in Heidenheim an der Brenz. The company's core activity is the greenfield-to-construction-ready development of ground-mounted solar parks, wind parks, and large-scale battery storage projects across Germany, organized around its proprietary STOLAR (STOrage + SoLAR) framework that combines PV generation with battery storage to optimize yields and avoid curtailment losses during negative-price hours. Site origination is driven by an in-house Geoinformationssystem (GIS) that screens topography, exclusion zones, EEG-compliant land designations, and grid-injection capacity; an internal energy-economics management function handles grid operator dialogue, regulatory compliance, and project economics from earliest stages.

The business is run as a hybrid B2B/B2C operation. Historically, Renergo sold development-ready projects to institutional investors at a premium (projects can appreciate up to ~200% from greenfield to commissioning), generating episodic project-realization revenues. The company is now transitioning to longer-term project ownership and operation, supplemented by a 2024 joint venture — strrom GmbH with ROM Technik/Zech Group — that targets commercial and industrial rooftop PV using 27 ROM Technik service locations nationwide. Renergo additionally raises retail capital via the WIWIN and Inyova crowdinvesting platforms (€1M+ raised in 2024-2025; €250 minimum ticket). With roughly 12-17 employees, offices in four to six German states, and a pipeline of more than 25 projects totaling approximately 300 MW, Renergo operates as a small, geography-focused specialist serving three end-segments: institutional renewable-energy investors, agricultural land owners, and C&I electricity customers.

Name

Renergo Gmbh

Legal name

Renergo GmbH

Website

https://renergo.de

Company type

Private

Founded year

2022

Operating status

Operating

Headcount range

11–50 employees

Short description

Renergo GmbH is a German renewable energy project developer (founded 2022, Heidenheim an der Brenz) that develops ground-mounted solar parks, wind parks, and battery storage projects nationwide, applying its proprietary STOLAR methodology and GIS-based site screening to serve institutional investors, agricultural land owners, and C&I customers via the strrom GmbH joint venture.

Ownership category

akta.pro rank

Product category

Renewable Energy Project Development

NAICS

Solar Electric Power Generation (221114)

SIC

Electric, Gas & Sanitary Services (4900), Electrical Work (1731)

akta.pro primary industry

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

akta.pro secondary industry

Land Acquisition, Site Preparation & Civil Works (Geotech, Grading, Roads, Drainage) (EUACAGAL)

Keywords

• Renewable energy development
• Solar park development
• Wind energy projects
• Battery storage solutions
• Agri-photovoltaic systems

Headquarters

HQ city

Heidenheim An Der Brenz

HQ country

Germany

HQ region

Europe

Offices7 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Project Development & Sales: Renergo develops solar parks, wind farms, and battery storage projects from greenfield through planning, permitting, and construction-ready stages, selling completed projects to institutional investors at a premium. The value of a project can increase by up to 200% from initial development to commissioning. This was the primary revenue model through 2024, but the company is transitioning to longer-term ownership.
2. Long-term Ownership & Operation: Renergo is shifting from early-stage project sales to retaining projects in its portfolio longer, self-constructing and operating solar parks and storage assets. This long-term model generates recurring revenues from electricity generation, ancillary services, and capacity payments, enabled by the crowdinvesting financing round.
3. Joint Venture — strrom GmbH (Commercial & Industrial PV): Renergo co-owns strrom GmbH (Joint Venture with ROM Technik / Zech Group) which plans and installs large PV and battery storage systems for commercial and industrial customers across Germany, generating revenue from project fees and long-term customer relationships.
4. Crowdinvesting Capital Raise: Renergo raised a low single-digit million euro amount via WIWIN crowdinvesting platform (November 2024 – June 2025 campaign), offering digital securities (term to 31 December 2029) with a maximum expected return of 9.24%, to fund project development costs and expansion into wind energy.

Pricing tiers

Go-to-market motion4 records

Distribution channels4 records

Marketing channels9 records

Core offering

Renergo GmbH develops large-scale ground-mounted solar parks, wind parks, and battery storage projects across Germany, handling the full project lifecycle from greenfield site identification through permitting and construction-ready handover. The company applies its proprietary STOLAR (STOrage + SoLAR) concept to combine PV generation with battery storage in a single project, and uses a proprietary Geoinformationssystem (GIS) to identify optimal sites. It also co-owns the strrom GmbH joint venture with ROM Technik (Zech Group) for commercial and industrial rooftop PV installations.

Product overview

Renergo GmbH is a German project development company for renewable energy, founded in 2021/2022 and headquartered in Heidenheim an der Brenz. The company operates as a unified project development service rather than a modular software platform. Its core offerings include the development of large-scale ground-mounted solar parks (Solarparks), wind parks (Windparks), and battery storage systems (Großspeicher/Batterie-Speicher) across Germany. Central to Renergo's approach is the STOLAR methodology — a proprietary concept combining Solar and Storage that integrates PV generation with battery storage to optimize energy yields, avoid negative electricity prices, and maximize revenue. The company also holds a 50% stake in strrom GmbH, a joint venture with ROM Technik (Zech Group) that focuses specifically on commercial and industrial rooftop solar installations, providing end-to-end solutions for businesses with roof spaces of at least 1,500 square meters. Additional services encompass land acquisition (Flächenakquise) using proprietary GIS tools, energy economics management for grid operator coordination, and project financing support. The company maintains offices in Baden-Württemberg, NRW, Brandenburg, and Bavaria, with a current pipeline of over 25 projects totaling approximately 300 MW.

Differentiator

Problem solved

Functional benefit

Brands

• STOLAR: Renergo's proprietary concept combining Solar and Storage (STOrage + SoLAR) for integrated PV and battery projects. STOLAR projects optimise energy yields by storing excess solar power and releasing it when demand or prices are high, stabilising returns and avoiding curtailment losses.

Products and services

• Solarpark-Projekte (Solar Park Development) Development and realization of large ground-mounted solar park projects across Germany. Covers site acquisition via proprietary GIS, permitting, financing structuring, and either project sale to institutional investors or long-term operation.
• Windpark-Projekte (Wind Park Development) Development and implementation of wind energy projects across Germany. Services include land lease negotiation, permitting, realization, operation of wind parks, investment opportunities, area leasing, and project transactions.
• Batterie-Speicher (Battery Storage Projects) Development of large-scale battery storage projects in combination with PV and wind installations or as standalone battery projects. Services include consulting, customized planning, area acquisition, project development, and optimization of existing systems.
• strrom GmbH (Commercial & Industrial PV) Joint venture with ROM Technik (Zech Group) specializing in rooftop solar installations for commercial and industrial customers. Provides tailored PV concepts for companies with high electricity consumption and roof space of at least 1,500 square meters, combined with intelligent energy storage for optimized self-consumption.
• Flächenakquise (Land Acquisition Services) Identification and acquisition of suitable land for solar, wind, and storage projects. Renergo uses a proprietary Geoinformationssystem (GIS) to analyze topography, exclusion zones, EEG-compliant area definitions, and grid capacity to identify optimal project sites and negotiate 30-year land leases.
• Energiewirtschaftsmanagement (Energy Economics Management) Consulting service that moderates processes with energy suppliers and grid operators to accelerate project timelines. Includes network dialogue, regulatory compliance management, grid and load analyses, robust economic and revenue models, and coordination of grid connection processes from early development onward.

Quantifiable outcome

• STOLAR projects yield ~20% higher revenues by avoiding losses from negative electricity prices (previously up to 20% of earnings were lost through curtailment at negative prices)
• +4 more outcomes

Named customers3 records

Segments4 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Two partnerships are on record, tiered core.

• ROM Technik (Rud. Otto Meyer Technik GmbH & Co. KG)coreStrategic or Co-development Partner · 1 May 2024ROM Technik, part of the Zech Group SE (a broadly diversified group focused on real estate development, planning, construction, and operations), co-founded strrom GmbH with Renergo in May 2024. ROM Technik contributes building and electrical engineering expertise and 27 German service locations, enabling strrom to offer nationwide commercial and industrial PV installation and service. Renergo contributes PV and storage project development expertise. The JV focuses on rooftop solar and storage for commercial and industrial customers.
• Zech Group SEcoreStrategic or Co-development PartnerZech Group SE is the parent company of ROM Technik. The group is broadly diversified around real estate development, planning, construction, and operations. Renergo's strrom GmbH joint venture operates as part of the Zech Group ecosystem, combining ROM Technik's building/electrical engineering capabilities with Renergo's renewable energy development expertise.

Scale indicators11 records

Recent moves8 records

Expansion highlights6 records

Broad incumbents

• 7C Solarparken AG: 7C Solarparken is a publicly listed solar park operator with a multi-hundred-MW portfolio of utility-scale PV plants across Germany and Europe. Comparable as a larger incumbent on the buyer/operator side of Renergo's utility-scale solar project pipeline.
• EnBW Energie Baden-Württemberg AG: EnBW is a major German utility with a rapidly expanding renewable energy generation business in solar, wind, and storage. It competes with Renergo for utility-scale renewable development sites in Baden-Württemberg and elsewhere in Germany.
• Encavis AG: Encavis is a publicly listed German operator/investor in solar parks and wind farms across Europe with a much larger portfolio than Renergo. It represents the institutional buyer side of Renergo's project sales and a broader incumbent competing for the same utility-scale asset opportunities.
• Q ENERGY Services SE (formerly Q CELLS Services): Q ENERGY is a major European renewable energy developer/operator with substantial utility-scale solar and wind project development in Germany. Like Renergo, it offers integrated solar and storage development at scale but across multiple European markets.

Direct peers

• juwi AG: juwi is one of Germany's largest dedicated renewable energy project developers, with utility-scale solar, wind, and hybrid (storage) projects nationwide. It is the closest functional peer to Renergo in terms of greenfield-to-construction-ready project development of solar parks, wind farms, and battery storage in Germany.
• GP JOULE Group: GP JOULE is a Schleswig-Holstein-based renewable energy developer covering wind, solar, biomass, and storage with full project lifecycle services. Like Renergo, it develops utility-scale renewable projects in Germany with an emphasis on integrated storage solutions.
• MaxSolar GmbH: MaxSolar is a German photovoltaic project developer specialising in large-scale rooftop and ground-mounted solar installations, frequently combined with battery storage. It is a comparable mid-sized German solar EPC and storage integrator competing for similar C&I and utility-scale customers as Renergo/strrom.
• IBC SOLAR AG: IBC SOLAR is a long-established German solar specialist covering PV system planning, components distribution, and large-scale project development including storage. Like Renergo, it develops utility-scale PV and storage projects and serves commercial customers with turnkey solutions.
• ENERTRAG AG: ENERTRAG is a German developer and operator of wind, solar, and hybrid storage projects with end-to-end project development, construction, and operations. Directly comparable to Renergo in combining wind/solar/ storage project development under a STOLAR-like hybrid model.

Emerging players

• Solar EGEN AG (Solar Millennium successors / project developers): Solar EGEN is a German solar project developer active in utility-scale solar and storage projects in Germany. Comparable as a smaller, focused developer of solar parks and battery storage in the same German market Renergo serves.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/RenergoSolar
• LinkedInlinkedin.com/company/renergo
• Instagraminstagram.com/renergosolar?utm_source=ig_web_button_share_sheet&igsh=ZDNlZDc0MzIxNw==

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 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 Renergo Gmbh