Zelya Energy

Technical audits

Zelya, advisory in energy market operations, transition and regulation

Our technical audit services cover energy projects under development as well as existing infrastructure: hydropower plants, wind farms, solar facilities, LNG plants, combined-cycle gas plants, and gas and electricity networks.

Each client engagement is based on a detailed assessment of needs, tailored to specific objectives:

  • Support in preparing due diligence, business plans, or term sheets for acquisitions.
  • Assessment of structural reliability, including:
    • Evaluation of operating records for turbines or energy installations;
    • Review of maintenance history, covering all inspections and repairs.
  • On-site diagnostics in the context of insurance policy negotiations.
  • Design of decision-support tools for operations and maintenance reporting.

We mobilize our most experienced experts, engineers, and technicians to perform comprehensive diagnostics on the current and anticipated condition of energy assets.

The expertise and training of our teams ensure a strategic and operational deliverable that is concise, responsive, and tailored to each client’s needs.

For example, in electricity generation:

Our diagnostics include full assessments of power plants, covering availability, performance, and potential technical risks.

Technical due diligence of operating or developing plants: validation of a plant’s technical characteristics and assessment of risks and uncertainties linked to resource estimates and production. We collect and analyze historical availability, flow and production data, as well as maintenance records.

Assessment of grid connection conditions: validation and optimization of connection requirements with respect to losses, outages, and curtailments.

On-site audit: evaluation of mechanical, hydraulic, and electronic systems, with recommendations on asset condition and replacement needs.

Performance and failure risk analysis: identification of root causes of underperformance related to operations, maintenance, or resource variability. Findings are used to test the relevance of existing insurance coverage and recommend adjustments.

See our client references

Information:

Call us at +33.4.93.71.33.11 or contact by Form

In other energy sectors:

We regularly conduct audits and due diligence across electricity, renewables, gas, heat, and network assets. Each engagement begins with a detailed needs assessment—whether for insurance renegotiations, acquisition support, or O&M optimization—mobilizing the appropriate expertise and methodologies to address risks and deliver actionable insights.

Due diligence and strategic expertise in thermal power M&A

Thermal Power Plants

Technical and commercial due diligence of several CCGT plants totaling more than 4 GW across Europe.

M&A consultants, due diligence in the natural gas sector

Gas and Power Networks, Storage

Due diligence and audits of gas storage, LNG, and electricity and gas transmission networks, covering transactions worth several billion euros.

M&A consulting in the renewable energy sector

Photovoltaic

Technical due diligence and performance optimization on projects ranging from 3 MW to over 100 MW, for clients such as Satcon, First Solar, Lampiris, Alpiq, Eneco, Caisse des dépôts, and European Energy.

M&A consultants in digitalization and the energy transition

Wind Energy

Technical audits and implementation of optimization tools for nearly 100 wind farms and projects, for clients such as BKW, Eos, SNCF, Lampiris, Alpiq, Eneco, Enfinity, Proener, and Caisse des dépôts.

Consultants for due diligence and valuation of dams and hydro plants

Hydropower

Technical audits and monitoring of hydro concessions from 8 to 84 MW, as well as around 50 small hydro plants, for clients such as Alpiq, Eos, Statkraft, Eneco, Enfinity, CDC, and GEG.

Information:

Call us at +33.4.93.71.33.11 or contact by Form

Description & Summary

Technical Energy Audits - Experts

Our technical audit services may include various types of energy infrastructure such as gas storage, LNG terminals, gas and power transmission networks, distribution networks, electricity generating units (combined cycle gas, coal plants, renewable-based power plants such as wind farms, biomass-based powerplants, geothermal energy, hydropower plants, biogas, solar ...). They include the development of specific scenarios of investment, checking the conditions and age of facilities. Our experts also assess the appropriateness of investment plans and assumptions related to the opex, capex ... maintenance costs and compliance and safety of companies in the energy sector.

• Investment plans & services in technical diagnostics of energy assets

Technical audit and diagnostic of gas storage assets, LNG plants, electricity networks, power plants (coal-fired, gas-fired, wind farms, solar plants...)