Reliably connecting energy systems to the grid

rensys supports project developers and power plant operators as a technical partner – from initial planning and approval through to secure grid connection. With transformer stations, transformers and switchgear, we offer a complete service package that ensures safety.

Generating electricity is one thing – cleverly integrating it into the grid is another.

Years of experience in the energy industry, with project management for more than 8 GW of installed capacity
27
international offices with the ability to manage projects in 16 languages - always in line with local network requirements and operator specifications
6
Cost savings per megawatt of substation connection capacity in the last 18 months, with simultaneous expansion of total output
13%
Shorter project lead times thanks to integrated EPC management, which speeds up delivery and increases customer benefits
23%

News on international projects

Conversion of the 110 kV outdoor facility in Heusenstamm

9 months
Project duration
15 years
Experience
Read case study

Our solutions for plant operators and developers

System connection to high and medium voltage

We handle grid connection planning for storage and hybrid power plants – fully compliant with regulations, site-specific, and thoroughly documented.

Component technology for feed-in

Transformers, switchgear, and transformer stations – tailored to power rating and feed-in point, tested and certified.

Retrofit for existing systems

We upgrade existing feed-in infrastructure – ensuring standard-compliant, stable, and future-proof reintegration.

Producers and project developers

Benefit from our 360° expertise

Grid connection and planning

The connection is tailored to the output, grid load and all regulatory requirements, and implemented transparently, on schedule and in compliance with regulations.

Project management and integration

We manage projects on a technically sound basis, ensuring reliability and adherence to schedules, while component selection and integration are carried out independently of manufacturers and thoroughly tested.

Operation and safety

We rely on tested, durable components to guarantee high system availability as well as long-term stability and safety.

Ready for your new energy project?

  • Reliable network solutions from over 27 years of experience
  • Everything from a single source: planning, procurement and implementation
  • Customised network solutions - flexible and independent.

1000+ successfully implemented energy projects since 1993

A network that drives energy

The world is on the move — we see global networking and technological dynamism as an opportunity for strong, future-oriented solutions.

Trusted by these customers

Frequently asked questions about connecting energy producers to the grid

Answers to key questions on grid connection, implementation and technology – especially for project developers.

Your networks are our responsibility.

Ready to rethink energy together?