Reliable Partner for Photovoltaics

More than just a subcontractor. Your reliable partner for photovoltaic projects. We don't just deliver installation. We create space for your business to grow.

50+
4.9 (Reviews from EPC and construction companies)
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About Us /

We Take On
Responsibility

WIDU is a specialized company in the renewable energy sector, supporting EPC companies, general contractors, and installation companies in the professional execution of photovoltaic projects. We see ourselves as a partner who relieves your company of organizational and operational burdens – while you focus on acquiring new projects and growing your business, we take responsibility for the implementation on site.

Our Projects
Services /

Execution
from DC to AC

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Design Service Custom Icon
DC Components
Mounting and Modules
Mounting systems, photovoltaic modules, and cabling – complete execution of the DC scope according to project documentation.
Solar Panel Custom Icon
AC Components
and Electrical Work
Inverters, grid connection, storage solutions, and electrical work – we handle the entire AC scope.
Battery Custom icon
Coordination
and Documentation
Close contact between our project office and installation teams throughout the entire construction phase, plus complete project documentation.
Collaboration /

How Our
Collaboration Works

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01.
Consultation and Planning
We get to know the scope of your project and define clear responsibilities. Reliable scheduling from the start avoids ambiguities that later cost time and money.
02.
Project Coordination
Our project office ensures structured coordination and complete documentation, so you always know the current project status.
03.
Execution on Site
Our installation teams handle DC and AC work with full responsibility. We identify and resolve challenges directly on site before they become bigger problems.
04.
Close Contact and Transparency
We stay in close contact with you throughout the entire construction phase, offering fast decision-making and proactive problem-solving – with no surprises.
Advantages /

Why
‍ WIDU?

We believe a professional partner must deliver more than just a clean installation.
Transparency Instead of Surprises
Transparent communication, fast decision-making, and structured project coordination at every stage.
Full Responsibility
We take responsibility for the execution on site – not just for individual tasks, but for the entire process, from the first to the last day of construction.
Long-term Partnership
We don't want to be just another subcontractor – we strive to be a long-term partner for companies that value quality and reliability.
Projects /

Our
Projects

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Reviews /

What Our Clients
‍ Say About Us

EPC companies, general contractors, and installation companies who trust WIDU with the execution of their projects.

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Testimonial Quote Icon

Working with WIDU allowed us to focus on acquiring new projects while they took full responsibility for the execution on site. Communication was exemplary throughout the entire project.

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Matthias Müller
Google Review

Instead of unanswered calls and missing documentation, we received transparent coordination and close contact with WIDU's project office. Problems were solved on site before they grew bigger.

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Jonas Schneider
Google Review

WIDU handles both the DC and AC scope for us – from mounting systems to grid connection. This allows us to focus on our clients and the growth of our business.

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Daniel Fischer
Google Review

From consultation to final acceptance – everything went professionally. We appreciate WIDU's transparency and always knowing what phase the project was in.

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Laura Becker
Google Review
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FAQ /

Frequently Asked
‍ Questions

Which companies does WIDU work with?

We work with EPC companies, general contractors, and installation companies, supporting them in the professional execution of photovoltaic projects.

What scope of work does WIDU handle?

We handle both DC components (mounting systems, modules, cabling) and AC systems (inverters, grid connection, storage solutions, and electrical work).

How does communication work during project execution?

Our project office maintains close contact with the installation teams throughout the entire construction phase. You always know the current project status.

Who is responsible for project documentation?

We ensure complete project documentation, so you avoid missing paperwork and unclear responsibilities on site.

How does WIDU respond to issues during the construction phase?

Challenges are identified, assessed, and – whenever possible – resolved directly on site before they become bigger problems.

We build photovoltaics. You build your business.

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Contact Details

kontakt@widu.de +49 000 000 000
Heerstraße 372, 13593 Berlin, Germany
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