Claire Dietz-Polte

Dr. Claire Dietz-Polte LL.M.

Baker McKenzie Rechtsanwaltsgesellschaft mbH von Rechtsanwälten und Steuerberatern


Dr. Claire Dietz-Polte is a Partner in Baker McKenzie's Public Law Practice and co-heads the German Energy & Infrastructure team. Claire started her career in the energy team of a leading law firm in 2011 and worked in the M&A/Energy & Infrastructure practice group of another major law firm from 2013 to 2016.

Practice Focus

Claire advises domestic and foreign enterprises, sponsors, banks and financial investors on M&A, joint ventures, projects and related financings in the energy and infrastructure sector. She has extensive expertise and experience advising on generation assets (renewables, gas, coal, nuclear), storages (battery, gas, oil) as well as networks (fibre, transmission and distribution).

Claire also advises on all stages of project development (particularly for renewable energy facilities, battery storage and data centers) from early-stage structuring to financing, and share or asset deal transactions to (Corporate) PPAs. Furthermore, Claire focuses on the implementation of projects and services agreements in the future mobility sector (e-mobility, micro-mobility). She is part of the Firm's Future Mobility Group. Claire's practice also covers commercial advice (e.g. energy and media supply agreements, infrastructure usage agreements) and regulatory advice (e.g. unbundling, third party access regimes, EEG surcharge reduction) in the energy & infrastructure sector.

Representative Legal Matters

  • Advised infrastructure funds managed by B Capitals Partners in connection with the establishment of BCP Battery Holding (BCP), a platform to acquire a pipeline of German battery assets exceeding 300 MW. As the first asset in this pipeline, the platform has acquired a 60 MW battery project in Eisenach, Thuringia which is currently under construction and will be the largest industrial battery in the German battery storage market once completed.
  • Advised EP Power Europe, a.s. (EPPE), a subsidiary of Czech energy supply company Energetický a pr┼»myslový holding, a.s. (EPH) in connection with the acquisition of STEAG Power Minerals Group. 
  • Advised a consortium of German banks, led by Bayerische Landesbank, and DTEK Renewables with respect to the ECA-backed financing of the construction of Primorska wind farm (200MW) in Zaporizhzhya region in Ukraine.
  • Advising automobile manufacturers and e-mobility services providers with respect to the worldwide implementation of their charging infrastructure and e-mobility services projects.
  • Advised Shell on the staggered acquisition of all shares in Sonnen Holding GmbH, Europe's largest manufacturer and distributor of rechargeable energy storage devices, and a leader in decentralized intelligent energy storage systems and services for households from venture capital investors and GE.
  • Advised the shareholders of Infrareal with respect to energy and infrastructure issues in connection with the sale of all shares in the company to Swiss Life Asset Managers and Gelsenwasser. Infrareal is the owner and operator of two prime life science-focused industrial parks in Marburg and Jena, Germany.
  • Advised Evonik with respect to energy and infrastructure issues in connection with the sale of its methacrylate business to the financial investor Advent International.
  • Advised Bayer with respect to energy law and infrastructure issues in connection with the sale of the industry park operator Currenta to Macquarie Infrastructure and Real Assets (MIRA).
  • Advised Kansai Electric Power on the participation in the NeuConnect consortium which will build, finance and operate the first interconnector between Germany and the UK, i.e. two submarine 500 kV HVDC-cables.
  • Advised DNS:Net Internet Service GmbH (DNS:Net) and its shareholders, DBAG Expansion Capital Fund and founder and majority shareholder Alexander Lucke, on the sale of a majority stake in DNS:NET to UK-based 3i Infrastructure plc.
  • Advised Vestas Group on the acquisition of a 25.1% minority stake in SOWITEC group GmbH.
  • Advised Infracapital, the infrastructure equity investment arm of M&G Prudential, on its investment in the CCNST Group (including the telecommunications network operator amplus AG), a leading provider of broadband services in Germany.
  • Advised investors on the proposed acquisition of shareholdings in the offshore wind farms Gode Wind I and Arkona.
  • Advised an international mineral oil company with respect to the draft of a template Corporate PPA to be used in the German market.
  • Advising an European energy supply company with respect to the further growth of its onshore renewables business in Germany, including advising on all issues related to the planning, implementation and operation of renewables projects and related offtake agreements (focus on wind onshore, PV).
  • Advised infrastructure funds on the acquisition of a large-scale battery storage project in Germany. The storage system is to be operated as part of an innovative marketing model that combines the marketing of flexibility on the primary control market and the intraday market.

Professional Associations and Memberships

  • German-American Lawyers' Association - Member


  • Germany (2011)


  • Fordham University School of Law (LL.M.) (2011)
  • State of Berlin (Second State Exam) (2010)
  • Humboldt University of Berlin (Doctor Iuris) (2009)
  • Free University of Berlin (First State Exam) (2006)


  • English
  • German
  • Co-author (with Holger Lutz), "Öffentliche Ladestationen - Wer sind die Aktuere und Zeitschrift für das Recht der Digitalen Wirtschaft," 2nd edition, Heft 1, January 2022

  • Co-author, "Unbundling of Grids," Electricity Grids: Legal and Economic Aspects, 2014

Firm Committee Memberships

  • EMEA Projects Steering Committee - Member
  • EMEA EMI Steering Committee - Member
  • Global Renewables Subcommittee - Member