Our due diligence services for companies and assets in the energy sector are primarily designed for banks and investment funds, as well as energy and industrial groups pursuing external growth.
Zelya Energy has built a strong reputation in both financial markets and the energy industry for its customized services and deep expertise in gas and electricity markets. The firm supports clients in valuing target assets and conducting technical, strategic, and regulatory due diligence.
We support clients:
Due diligence refers to validating regulatory and technical assumptions within a company’s or project’s financial model: What are the reserves and production forecasts of a plant? What is the availability rate of a wind farm? Is the grid connection of a gas-fired power station optimal? Is the expansion or renovation plan of a hydroelectric facility appropriate for its design and site conditions?
Our experts can model resource potential and projected output, estimate past and future investment requirements, and quantify assumptions on availability rates or equipment replacement, compliance, and upgrade scenarios underpinning the business to be acquired.
Our consultants’ technical expertise enables them to critically review business plans, conduct detailed audits of facilities, and assess the quality of operations and maintenance practices.
This expertise is essential to rigorously assess the technical risks of an acquisition, protect clients by recommending investment conditions, and provide relevant inputs into the financial models on which valuations are based.
Considering an acquisition, refinancing or vendor due diligence?
Zelya Energy delivers independent technical, financial and regulatory due diligence on energy and renewable assets across Europe — wind, solar, hydro, gas and electricity.
Request a proposal → +33 4 93 71 33 11 See selected case studies
Selected Due Diligence Engagements
Gas CCGT. Due diligence of a 430 MW combined-cycle gas plant in France: risk analysis of supply and resale; advisory support to the legal and financial teams of the mandated investment bank for the takeover.
Infrastructure. Technical and regulatory due diligence of the assets and activities of the GRT gas transmission operator in the context of its capital opening.
Hydropower. Due diligence of a portfolio of four hydroelectric plants, two under concession, totaling 50 MW: assessment of land rights, easements, concession decrees, infrastructure and grid connections; evaluation of return assets; drafting investment conditionalities.
Solar. Comprehensive financial, legal, and technical due diligence of a 39 MW ground-mounted solar farm in France; support for acquisition negotiations.
Wind. Due diligence and risk analysis of a portfolio of wind projects in Europe: permit and land rights compliance review; development of a financial valuation model; economic and business plan analysis; recommendations on investment suspension clauses.
Gas Storage. Due diligence of a natural gas storage company.
Information:
Call us at +33.4.93.71.33.11 or contact by Form
A senior team built on 20+ years of energy transactions
90+
Due diligence engagements completed across Europe
5+ GW
Of renewable and conventional assets reviewed
6
Active European markets: FR, IT, ES, UK, BE, DE
20+
Years of senior expertise in gas, power and renewables markets
Trusted by leading energy stakeholders
Selected references from our consulting engagements:
Who we work with
Lenders & banks
Independent technical and financial reports for project finance, refinancing and senior debt structuring. We deliver lender's due diligence and lender's technical advisor (LTA) roles for renewable and conventional asset financing.
Private equity & infrastructure funds
Buy-side commercial, technical and regulatory due diligence on platforms, portfolios and single-asset deals. We act fast on competitive auctions and provide red flags reports calibrated to investment committee timelines.
Corporate development & utilities
Strategic and cross-sector due diligence for utilities, IPPs and industrial groups pursuing external growth. We support market entry, geographic expansion and bolt-on acquisitions across European energy markets.
Sellers & developers preparing exit
Vendor due diligence (VDD) on operating assets and development pipelines. We anticipate buyer questions, structure the data room, and prepare bidders for accelerated sale processes — including reliance for shortlisted parties.
Featured engagement
Case study · Wind portfolio
Due diligence and evaluation of a 47 MW wind portfolio
Carried out for a Western European energy utility, this engagement covered the full integrated due diligence on a 47 MW operating wind portfolio: technical performance, regulatory compliance, financial modelling, and investment conditionalities — supporting the acquirer through to deal closing.
More engagements available on our Projects & Accomplishments page.
Where we add the difference
Structurally independent. Zelya Energy is not part of an M&A bank or transaction advisory group. We do not collect transaction success fees and never run buy-side and sell-side mandates on the same target. Our remuneration is decoupled from deal closing — a critical safeguard our clients value when stakes are high and timelines compressed.
Senior consultants on every engagement. Our teams are composed of energy industry veterans (former directors of European utilities, plant developers, network managers) — not junior analysts running screens. The same senior who scopes your engagement signs the final report.
WindDeep — proprietary monitoring platform. For wind asset reviews, we run our own SaaS application WindDeep to analyse SCADA data, availability and turbine-level performance. Few competitors bring this depth of data-driven assessment on top of regulatory and financial reviews.
Where we are particularly strong. Hydropower concession renewals in France, mid-cap renewable portfolios (10–500 MW), gas infrastructure in Southern Europe, electricity network unbundling, and emerging-market financing (World Bank, UNDP, AfDB).