OneSolar

OneSolar International GmbH

Eching, Germany

SolarPrivate company

Founded 200811-50 employees300 MW installed

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Profile last updated: September 16, 2026

About

Founded in 2008, OneSolar is a private company headquartered in Eching, Germany with approximately 11-50 employees specializing in Solar.

OneSolar is a German solar energy company founded in 2008 and based in Eching, Bavaria. Specialized in the development, planning, financing, and operation of ground-mounted photovoltaic systems. The company has completed over 100 solar parks across Germany with total installed capacity exceeding 300 MW. OneSolar develops complete infrastructure solutions, including cable trasses and electrical substations, to connect solar parks to the grid. The company operates as an Independent Power Producer with a strategic vision to achieve 1 GW of owned capacity by 2030. OneSolar works with landowners, municipalities, and investors, offering long-term park operation (30 years) with guaranteed decommissioning, habitat restoration measures, and agrivoltaic solutions combining solar generation with agricultural use.

Headquarters

Eching, Germany

Founded

2008

Employees

11-50

Company type

Private company

Focus areas

solar energyphotovoltaicground-mounted solarsolar parksindependent power producerrenewable energy developeragrivoltaicGermanyinfrastructuretransmission

Products & services

Business models

B2BIPP

Value chain

DevelopmentEngineeringConstructionO&MAsset Management

Service areas (2)

Solar park development and operation
Development, planning, financing, and operation of ground-mounted photovoltaic systems across Germany
Infrastructure development
Design and construction of transmission cable trasses and electrical substations to support solar park grid connection

Locations

Headquarters

Am Moos 9, 84174, Eching, Germany

Operating locations (2)

Dircksenstr. 49, Berlin, Germany
Berlin, Germany

Service regions

Germany

Projects

Solarpark Binsham

OperationalGround-mounted solar farm

Large-scale solar park featuring over 70,000 solar modules with a 10 km cable trasse installed via directional drilling beneath the Isar river. Includes insect hotel for biodiversity.

Germany

Solarpark Ahornstraße

OperationalAgrivoltaic solar farm

Agrivoltaic solar park where cattle and sheep graze beneath the solar modules, which are mounted at 2.20m height to allow livestock passage.

Germany

Solarpark Ödgarten

OperationalGround-mounted solar farm

Solar park constructed between forest and railway tracks with cable trasse through nearby residential area, presenting significant logistical challenges.

Germany

Solarpark Tegernbach

OperationalGround-mounted solar farm

Solar park constructed simultaneously with Airischwand and Ammersberg parks, reducing construction time through coordinated multi-project approach.

Germany

Solarpark Margarethenried

OperationalGround-mounted solar farm

Solar park built with Flickendorf and Tondorf parks, featuring extensive compensation areas for protected Eurasian skylark habitat.

Germany

Solarpark Viecht

OperationalGround-mounted solar farm

Solar park featuring experimental north-facing module row to analyze and evaluate yield impacts for future projects.

Germany

Solarpark PLF

OperationalGround-mounted solar farm

6.7 MWp solar park successfully connected to grid.

6.7 MW capacityGermany

Solarpark HOE

OperationalGround-mounted solar farm

1.8 MWp solar park subject to repowering with technical modernization and proper recycling of old modules.

1.8 MW capacityGermany

Cluster-Projekt KOP

OperationalGround-mounted solar farm

Nearly 25 MWp cluster project across six construction fields connected via dedicated substation to high-voltage grid.

25 MW capacityGermany

Altdorf Infrastructure Project

OperationalTransmission infrastructure

Infrastructure project involving 105 km of cable transmission connecting five solar parks with combined capacity over 35 MW to Bayernwerke switching station via dual parallel cable systems.

35 MW capacityAltdorf, Germany