Hélène Gelas advises on public law, environmental law, urban planning law and energy law, in the field of energy and real estate.
She holds a doctorate in law and assists her clients, from large listed groups and investment funds to small and medium-sized French and international companies, with advice and litigation before the administrative courts and in all stages of projects, whether for major real estate development projects or for renewable energy projects (wind, photovoltaic, hydraulic, methanization, hydrogen or storage…).
She assists clients in all matters relating to the obtaining of authorizations (development strategies for complex projects, implementation of construction under appeal, etc.), and also, for energy projects, connection or even power purchase contracts.
Skills
Lawyer since : 2006
Bar. : Paris
Language(s) : French - English
Training :
- Doctorate, Université Paris II – Panthéon Assas – 2004
- DEA Public International Law, Université Paris II – Panthéon Assas
Member of :
- Syndicat d’énergies renouvelables (SER)
- France Energie Eolienne (FEE)
- Association Technique Energie Environnement (ATEE)
- Syndicat des professionnels de l’énergie solaire – ENERPLAN
Publications
- “Gre a gre contracts for biogas will be able to develop in the same way as for electricity” – Actu-Environnement, 07/27/2023
- The European Union’s climate measures are “an opportunity that must be transformed” – Le Monde de l’Energie, 02/06/2023
- In France, “the RE projects exist, the waiting lines are full” – Le Monde de l’énergie, 30/01/2023
- The State Council revives the case of pre-2011 solar tariffs – Green Univers, 31/01/2023, quote from Hélène Gelas
Jeantet advises BPIFRANCE on the financing of the development and construction of a wind fram owned by the WYSERNERGY group
Paris, June 24, 2025 – Jeantet advised BPIFRANCE on the implementation of financing in the principal amount of approximately €17 million to fund the development and construction of a wind farm located in the municipality of Faux-Fresnay, led by the WYSENERGY group.
Paris | BANK-FINANCE-REGULATORY
Jeantet assists Melvan in its €25 million fundraising to accelerate its development in France
Paris, June 26, 2025 – Jeantet assisted Melvan, a multi-technology renewable energy producer and developer, in opening its capital to a consortium of investors composed of Bpifrance, through its France Investissement Énergie Environnement 2 fund, IDIA Capital Investissement, through its Crédit Agricole Energie & Economie Bas Carbone I fund, and a pool of investors from […]
Paris | CORPORATE – M&A – PRIVATE EQUITY | PUBLIC LAW – PUBLIC CONTRACTS | ENERGY AND NATURAL RESOURCES LAW | BANKING AND FINANCE LAW | EMPLOYMENT
Jeantet advises KEON on a €40 million bond financing arranged by SIENNA INVESTMENT MANAGERS
Paris, June 2, 2025 – Jeantet advised KEON Group, a leading French player in the biogas sector, on a €40 million bond financing arranged by Sienna Investment Managers. This strategic transaction marks a new milestone in KEON’s development and consolidates its position as a leader in the green gas sector. KEON operates across the entire […]
Paris | BANK-FINANCE-REGULATORY
Jeantet advised the LOOPING GROUP in its acquisition of PARC SAINT-PAUL
Paris, 24 March 2025 – Jeantet advised the Looping Group, the leading European operator of regional leisure parks, announced the acquisition of Parc Saint-Paul, one of the most iconic theme parks of the region of Oise in France and ranking amongst the 10 most important theme parcs in France. Created in 2011, the Looping Group […]
Paris | CORPORATE – M&A – PRIVATE EQUITY
Jeantet advised IST on the sale of three wind farm projects in France
Paris, 9 July, 2024 – Jeantet advised IST, a Swiss independent investment foundation, on the sale of three wind farm projects to Volta group. Jeantet assisted IST in the sale to the French Volta group (an independent developer and producer of renewable energy) of three wind farms in France with a combined total capacity of […]
Paris | CORPORATE – M&A – PRIVATE EQUITY
Jeantet advised PLENIUM PARTNERS and SWEN CAPITAL PARTNERS in the fundraising of €87 million of SMART ENERGIES to accelerate its development
Paris, 7 June, 2024 – Jeantet advised Plenium Partners’ and SWEN Capital Partners’ funds in their investment in Smart Energies, a French leading solar IPP, alongside the long-standing historical shareholders of Smart Energies, and RGREEN INVEST, which has supported the group since 2022. The capital increase amounts to €87 million and will accelerate the deployment […]
Paris | CORPORATE – M&A – PRIVATE EQUITY
Jeantet advises banking pool in connection with a new financing transaction for a portfolio of 331 photovoltaic power plants
Paris, April 3, 2024 – Jeantet assisted the banking pool, made up of BPIFrance, CIC and Unifergie, with a new project financing package developed by Tenergie. The transaction, valued at over one hundred million euros, involves the financing of a portfolio of 331 photovoltaic power plants located in France, installed on building roofs, on the […]
Paris | FINANCING
Jeantet advised EB-SIM in the context of the acquisition of three wind parks from Volkswind, a subsidiary of the Swiss energy company Axpo
Paris, 3 January 2024 – Jeantet advised EB Sustainable Investment Management GmbH on the acquisition of a portfolio of three operating wind farms with a total nominal capacity of 72 MW from Volkswind GmbH, a subsidiary of the Swiss energy company Axpo. On December 15, 2023, Volkswind GmbH, German subsidiary of the Swiss energy company […]
Paris | CORPORATE – M&A – PRIVATE EQUITY | ENERGY
Jeantet advised Equinox Industries in the acquisition of Clear Channel France
Paris, 7 November 2023 – Jeantet advised Equinox Industries, industrial French holding, in the acquisition of Clear Channel France, the second largest advertising operator in France. After several months of exclusive negotiations and an information and consultation process that culminated in a positive opinion from the works council of Clear Channel France (CCF), Equinox Industries, […]
| CORPORATE – M&A – PRIVATE EQUITY
Jeantet assists the banking pool in connection with the financing of the Tenergie project
Paris, July 28, 2023 – Jeantet has advised the banking pool (CIC, BPCE Energéco and BPI France) in connection with the project financing transaction for Tenergie, a French developer and producer of renewable energies. The €78 million global financing transaction covers the funding of a varied portfolio of photovoltaic power plants: roofs on existing buildings, […]
Paris | BANK-FINANCE-REGULATORY
“Gre a gre contracts for biogas will be able to develop in the same way as for electricity” – Actu-Environnement, 07/27/2023
The acquisition of biomethane to decarbonize gas use is set to evolve in a similar way to the acquisition of green electricity, according to Hélène Gelas, a partner at Jeantet. Over-the-counter contracts such as the Biogas Purchase Agreement have a role to play. Website link
Paris | ENERGY AND NATURAL RESOURCES LAW
Jeantet advises Susi Partners in the acquisition of a majority stake in french renewable energy developer Apal MW
Paris, on July 18, 2023, Jeantet advises SUSI Partners in the acquisition, through the SUSI Energy Transition Fund, of a majority stake in newly formed APAL MW (APAL), a French clean energy development company born out of the merger of French wind and solar developers 3N Développement and L’Agence de Développement des ENR (ADE). By […]
Paris | CORPORATE – M&A – PRIVATE EQUITY