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Substations for investors & tenders: Your partner for bankable grid connections

Whether you’re a fund, a project developer, an energy supplier or an institutional investor: anyone investing in renewable energy today stands or falls on the grid connection. The substation is the critical interface between your generation plant and the public grid – and thus the point at which your project’s return on investment, adherence to deadlines and bankability are determined. WT Energiesysteme GmbH plans, builds and manages turnkey substations ranging from 10 to 380 kV, all under one roof, providing you, the investor, with the planning and cost certainty you need for financing and successful tendering processes.

Aerial view of a substation with two power transformers surrounded by a large-scale solar farm, with wind turbines visible in the background.

Everything from a single partner

Why investors should opt for a main contractor for the substation

For investors, one thing matters above all else: a project with predictable costs and minimal interface risk. At WT Energiesysteme, you receive the full range of services – from the feasibility study through to planning permission applications, design and construction, right through to commissioning – and we have been doing so for over 20 years. Instead of having to coordinate multiple trades, you have a single point of contact from the ground-breaking ceremony right through to the plant being ready for operation. This reduces delays, avoids costly coordination issues and makes your project easier for banks and investors to assess.

Predictable and reliable

Planning and investment certainty for your energy project

Reliable cost estimates and realistic timetables form the basis of any sound investment decision. Because WT Energiesysteme manufactures the key components – including switchgear, protection, control and telecontrol cabinets – in-house and is approved by all German grid operators, you remain independent of unpredictable supply chains. More than 250 substations that have been commissioned prove that, for us, deadlines and budgets are not mere declarations of intent, but firm commitments. For you, this means a solid foundation for business cases, due diligence and financing discussions.

References

Certification speaks for itself

How to win tenders: the benefits of working with a certified partner

In public and private tenders, evidence, references and certificates are decisive in determining which bid is awarded the contract. WT Energiesysteme possesses all the relevant qualifications: certified quality management to ISO 9001, environmental management to ISO 14001, occupational health and safety to ISO 45001, and SCC certification for safety, health and environmental protection. With a robust list of references, clear processes and comprehensive, verifiable documentation, we support you in preparing competitive and legally compliant tenders – and in winning contracts.

Full life cycle

From the feasibility study to commissioning – all handled by a single team

Our range of services covers the entire life cycle of your substation – from planning right through to day-to-day operation.

01

Planning

Design and detailed planning in structural, primary and secondary engineering.

02

Project organisation

Coordination of all parties involved throughout the entire course of the project.

03

Procurement and assembly

Procurement and installation of all components of the substation.

04

In-house production

Manufacture of the secondary plant components in our in-house production facility.

05

Inspection and handover

Comprehensive testing and commissioning of a fully operational system.

06

Maintenance and modernisation

After-sales support throughout the entire service life – to ensure availability and, consequently, your profitability.

A proven track record of success

Experience that wins over investors

Trust is built on a track record of proven results. WT Energiesysteme is a financially stable, fast-growing company based in Riesa and Dresden, and has been named ‘Saxony’s Entrepreneur of the Year 2025’. With an annual turnover of over 190 million euros, more than 250 completed substation projects and a well-coordinated team, we are one of the leading providers of grid connections in the renewable energy sector. This track record gives investors and clients the assurance that they are working with a partner capable of delivering even the most challenging large-scale projects to a successful conclusion, reliably and over the long term.

A brief explanation

Frequently asked questions from investors and tendering organisations

We design and construct substations and grid connections across the entire range from 10 to 380 kV – from medium voltage to extra-high voltage. In this way, we provide grid connections for wind and solar farms, hydrogen projects and industrial applications. In addition, we develop and build large-scale battery storage systems from 5 MW upwards, with a focus on 20 to 100 MW/2h, including the grid connection point. This enables us to find the right solution for projects of almost any scale.

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Enquire about your substation project now

Are you planning to invest in renewable energy or preparing a tender? Talk to us about your project and secure a partner who will carry out the planning, construction and operation of your substation reliably and in a manner that meets banking requirements.

Robert Stefaniak

Sales Manager

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