Project Economics & Financial Modelling

Model purpose and decision boundaries

A model exists to support a decision—FIDs, refinancing, tariff negotiation, funding applications or option selection. TDTEC defines purpose, material outputs and what the model will not claim before structure is built.

Important: TDTEC provides technical-commercial modelling support. It does not provide regulated financial advice, act as a financial adviser, or hold itself out as a CFA or accounting firm. Tax, legal, market forecasting and formal valuation work remain with appropriately qualified specialists. Clients retain responsibility for investment decisions.

Experience includes PPAs, investment gate analysis and project economics on major energy developments in prior roles. That depth informs modelling discipline; it is not a promise of outcomes for a new engagement.

Technical inputs and operating assumptions

Generation, availability, degradation, curtailment, auxiliary load and major maintenance should trace to engineering evidence—not spreadsheet defaults. TDTEC builds or audits the bridge between technical studies and model inputs.

• Energy yield and storage performance linked to study status
• Operating and availability assumptions with stated basis
• Capital and operating cost interfaces to procurement scope
• Documented input hierarchy for later audit or diligence

Scenarios and sensitivity analysis

Decision-makers need to see which assumptions move outcomes. TDTEC prioritises sensitivities that reflect real project risks: connection timing, capex escalation, offtake shape, performance shortfall and funding cost—not exhaustive trivial toggles.

• Scenario sets aligned to board or funder questions
• Tornado or sensitivity charts with interpretive narrative
• Break-even and hurdle interactions where useful
• Clear separation of deterministic inputs versus distributions

Funding and commercial interfaces

Models interact with debt sizing, grant timing, contract structures and merchant exposure. TDTEC coordinates assumptions with commercial advisers so the engineering story and the funding story match.

Where a project may seek public funding, economics outputs should align with grant and funding advisory evidence requirements without overstating certainty.

Reviewable model outputs

Deliverables include a reviewable workbook or model, an assumptions book, and a concise narrative for non-modellers. Version control and change logs support later diligence or board refresh.

• Transparent calculation paths for critical metrics
• Checks for circular references and unit consistency
• Handover session with client team or external modellers
• Scope for independent review or audit support