A WindAdvice and Volksbank Mittelhessen company.


Wind Power



Solar Energy


Our service includes the entire value chain for projects across Europe. From the assessment, acquisition of project rights/user agreements, ready-to-build projects to turnkey or existing assets, we make long-term investments in renewable energies. The team has a high level of competence for financial, commercial, legal and technical project management tasks and has many years of experience in setting up, developing and operating complex project structures.

Acquisition/ Purchase of Projects/ Project Rights

Due Diligence

Financing/ Investment for own Operation

Projec Management

Contract Negotiation & Design

Asset Management

With a balance sheet total of €10.1 billion, Volksbank Mittelhessen is one of the largest cooperative banks in Germany. As of December 31, 2021, the customer loan volume was €6.3 billion, with commercial lending accounting for around 63%. Volksbank Mittelhessen is committed to a sustainable future and the conscious use of natural resources. It is one of the drivers of the regional energy transition and supports numerous projects that serve to protect the environment and the climate.
WindAdvice (WA) acquires projects in the field of renewable energies for customers in a targeted manner, carries out the legal, economic and technical assessment of the projects, accompanies the project development, construction and commissioning process or manages the assets. Repowering in Germany is one of the focal points of WA, as is the development of new European markets in the renewable energy sector or optimizing the profitability of projects with a focus on renewable energies such as wind, solar, water and hydrogen.

Our Team

Kathleen Zander

Managing Director

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More than 13 years in the field of wind turbine production and project development make the qualified industrial engineer an all-rounder for all questions of a complex transaction / business idea or the development of economically interesting wind energy projects. As the perfect organiser, she energetically steers your customers, your contacts and the course of a well-structured transaction. With innovative ideas and solutions to commercial issues and with a lot of enthusiasm, the native of Anhalt always works on a good understanding of both sides. After more than 100 transactions in the purchase and sale of projects in Germany, France, Poland and Sweden as well as numerous due diligence reviews, WindAdvice has a well-developed network that WindAdvice can draw on. For every problem, the 35-year-old helps bring about a solution for her customers. Within the framework of financing at the equity, mezzanine or senior level, K.Zander can point to the success of more than EUR 400 million in alternative financing. From Rostock, the shareholder and managing director of WindAdvice will also shape your pipeline in the future or guide you through future transactions.

Holger Happel

Managing Director

Martina Köhn

Managing Director

Accordion Content
Martina Köhn is a shareholder and managing director of WindAdvice GmbH and has been the owner and managing director of WindAdvice Denmark since 2016. She is a licensed attorney in Germany with a focus on legal and commercial advice to clients in the field of renewable energies. In addition to more than 20 years of international experience in the areas of project development, purchase and sale of renewable energy projects, contract negotiations, due diligence as well as financing, asset management and business development, she has held numerous management positions in Denmark and Sweden in the areas of investment and wind turbine production clothed and is very well connected in Germany, Scandinavia and Poland. She was also a member of the supervisory board of Norddeutsche Energien AG (fund structure).

Dr. Georg Renner

Board Member

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Dr. Georg Renner advises both buyers and sellers on domestic and cross-border real estate and corporate transactions, both in the form of asset and share deals. He covers the entire tax spectrum of the transaction, from coordinating letters of intent and tax due diligence to drafting and negotiating contracts. He also advises on restructuring, joint ventures and conversions. In addition to transaction tax law, Dr. Renner in all aspects of current tax law, especially in the area of loss utilization, group taxation, holding structures, withholding tax exemptions and license taxation. Dr. Renner represents his clients in external audits, out-of-court appeals and in tax court proceedings.

Niklas Henkel

Board Member

Sebastian Adler

Board Member

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Sebastian Adler worked in various banks from 2006 to 2013. Among other things, in risk management at Unicredit in the area of special financing (aircraft, ships, special systems, etc.). He then worked as a management consultant for several years. There he advised companies in various sectors (hotel and gastronomy, Anklam Extract, Taraxa Gum, agriculture and trade) and also got to know the wind industry. From 2017 he then switched to the wind industry at eno energy GmbH, where he was responsible for controlling until he was appointed to the board of NEAG Norddeutsche Energie AG at the end of 2017. Until April 2020, he was responsible for setting up this AG, which grew from a balance sheet total of EUR 100,000 to over EUR 400 million during this time. Under his responsibility, bonds (mezzanine) of over EUR 100 million were issued and subscribed to by various investment funds. More than 40 wind farms were purchased and refinanced. At the end of his term of office, the entire portfolio amounted to over 360 MW of nominal output and over EUR 400 million in assets under management.

Sascha Rexin

Board Member