01
Fast route
Professional Check
Five model tests, one debt-service calculation and a hard check on base-case dependency.
- Five focused lessons
- 10 scored questions
- Answer rationales after submission
About 15 minutes
Vitreous Learning 09
Professional BESS course · Great Britain
The model is a chain of physical and commercial claims
Link dispatchable capability, evidence-based revenue, operating costs, augmentation, finance and downside cases without hiding uncertainty in one headline IRR.
2 learning routes80% pass standard30 assessment questions
Choose your route
Evidence ledDOEOfgemDESNZTechnical cut-off · 24 August 2026
One subject · two depths
Choose your route
This course focuses on model architecture and investment-grade reasoning. It is educational and does not provide valuation or investment advice.
02
Full route · recommended
Detailed Course
From assumptions and physical dispatch through revenue, CAPEX, OPEX, financing, sensitivities and a complete investment-committee case.
- Nine detailed modules
- High Fell worked case
- 20 scored questions
75 to 90 minutes
Scores and progress remain on this device. No account or sign-up is required.
Professional Check · About 15 minutes
Can you trace the output back to physical and contractual evidence?
Build an assumption chain that can be challenged line by line, with uncertainty visible in scenarios.
Lesson 1 of 5
Control the assumptions
Every input needs unit, basis, date, source, owner, scenario and review status.
Separate hard-coded inputs, calculations and outputs. Use a change log and flag stale or circular assumptions. Preserve nominal or real currency, inflation and tax treatment.
Link each high-impact assumption to evidence and a downside case.
Hostile check
A professionally formatted model can still be unauditable when inputs are scattered through formulas.
Lesson 2 of 5
Build the physical engine first
Revenue cannot exceed the energy, power, availability and connection envelope.
Model net import and export limits, usable energy, efficiency, auxiliaries, degradation, outages and service reserves. Reconcile annual throughput with warranty limits.
Augmentation should change physical capability, cashflow and downtime in the correct periods.
Hostile check
A revenue line that does not consume energy, headroom or availability can create impossible stacking.
Lesson 3 of 5
Separate revenue cases from evidence classes
Contracted, observable, modelled and speculative value deserve different confidence and scenario treatment.
Use market-specific drivers and avoid applying one flat £/MW/year growth rate. Model saturation, eligibility, fees, cannibalisation and route-to-market terms.
Perfect foresight is an upper bound. Contract floors require credit and exclusion analysis.
Hostile check
Blending contracted and merchant revenue into one weighted average can hide which downside actually breaks the project.
Lesson 4 of 5
Include the full cost and working-capital bridge
CAPEX, OPEX, charging energy, augmentation, network costs, tax and settlement timing all affect cash.
Separate construction spend, contingency, development, connection, equipment, financing fees and reserves. In operations, include fixed and variable costs plus collateral and delayed settlements.
A positive accounting margin can coexist with a cash shortfall.
Hostile check
Using a percentage-of-CAPEX OPEX shortcut without checking actual contracts can omit major step costs.
Lesson 5 of 5
Test debt and equity separately
Debt service cares about timely cash and covenants. Equity return also reflects leverage, distributions and terminal assumptions.
Calculate cash available for debt service, debt service coverage, reserve requirements and distribution locks. Run downside and delay cases.
Check whether the project depends on refinancing, residual value or warranty recovery to meet target returns.
Hostile check
A high equity IRR created by aggressive leverage can coexist with weak debt resilience.
Primary and standards sources used in this course
Professional Check assessment
Answer every question before submitting. Correct answers and rationales appear only after the complete attempt.
Professional CheckQuestion 1 of 10
Detailed Course · 75 to 90 minutes
Construct a model that survives hostile review
Integrate technical performance, market evidence, costs, financing and downside resilience within one controlled architecture.
Module 1 of 9
Design an auditable architecture
Inputs, physical calculations, market modules, financial statements, financing and outputs should reconcile without hidden plugs.
Use consistent time resolution and aggregate only after physical dispatch. Add checks for energy balance, source and use of funds, balance sheet and cash roll-forward.
Separate scenario selection from formulas. Lock units and signs.
Hostile check
A balancing plug can make statements reconcile while concealing a real modelling error.
Module 2 of 9
Build the technical state
Track capacity, state of charge, power, efficiency, availability, degradation and augmentation over time.
Use a dispatch representation appropriate to the decision. Hourly or sub-hourly operation may feed monthly financial statements. Enforce import, export, energy and concurrent-service constraints.
Reconcile duty to warranty usage and maintenance.
Hostile check
Monthly average prices cannot reproduce intraday cycling value without a separately justified shape model.
Module 3 of 9
Construct market-specific revenue
Each revenue source needs its own volume, price, eligibility, availability and settlement logic.
Model wholesale, BM, balancing services and Capacity Market separately before stacking. Include opportunity cost and compatible commitments. Apply route-to-market terms at the correct layer.
Use historical back-tests, forecasts and contracts for different purposes, with common asset constraints.
Hostile check
Adding independent market maxima produces a revenue stack that no physical dispatch can achieve.
Module 4 of 9
Model OPEX and lifecycle costs
Use contract schedules, escalation, variable use and step changes rather than one unexplained percentage.
Include O&M, LTSA, insurance, leases, business rates where applicable, metering, telecoms, optimiser fees, network charges, compliance, spares and decommissioning provision.
Model augmentation and major replacements with downtime and residual value.
Hostile check
A low early-year OPEX average can hide expensive later augmentation and inverter replacement.
Module 5 of 9
Control CAPEX and schedule
Spend timing, contingency, connection scope and delay affect funding need and return.
Build a uses schedule by package and milestone. Include development, land, planning, network, EPC, owner costs, taxes and financing fees. Link delay to revenue start and liquidated damages.
Separate contingency from known omissions.
Hostile check
A contingency percentage cannot responsibly cover a missing transformer or connection scope.
Module 6 of 9
Build financial statements and tax
Project cashflow should reconcile revenue and costs through profit, tax, balance sheet and cash.
Model working capital, VAT timing where relevant, depreciation, interest and tax losses using professional advice and stated jurisdictional assumptions. Distinguish distributable cash from EBITDA.
Use nominal cashflows with nominal discount rates, or real with real, consistently.
Hostile check
Discounting nominal cashflows at a real rate overstates value.
Module 7 of 9
Size debt to downside cash
Debt capacity follows contracted or resilient cash, covenants, tenor and lender assumptions.
Calculate cash available for debt service and DSCR by period. Add debt-service reserve, cash sweeps, distribution locks and refinancing assumptions.
Test delay, revenue downside, degradation, outage and interest-rate cases.
Hostile check
Sizing debt to the base-case IRR ignores the lender's concern with low-cash periods.
Module 8 of 9
Use sensitivities that expose decisions
Prioritise variables that change the investment conclusion and show interactions.
Run revenue level and shape, saturation, CAPEX, delay, degradation, augmentation, availability, efficiency, inflation and financing cases. Use break-even analysis for critical inputs.
Document correlations and avoid presenting a probability distribution without evidence for its inputs.
Hostile check
A tornado chart can look comprehensive while omitting the correlated downside that matters most.
Module 9 of 9
High Fell investment-committee case
The committee needs drivers, downside resilience and evidence gaps rather than one return number.
High Fell costs £52 million. Base-case annual EBITDA begins at £7.2 million and debt service is £4.8 million, giving 1.50x DSCR. A revenue downside reduces EBITDA to £5.4 million and DSCR to 1.13x, below the 1.20x distribution threshold.
A six-month delay adds £1.3 million of interest and owner cost and removes £2.7 million of first-year EBITDA. The model's 13.0 percent equity IRR falls to 8.1 percent. The decision requires more first-year revenue evidence or less leverage.
Base DSCR1.50x
Downside DSCR1.13x
Delay IRR8.1%
Hostile check
Reporting only the 13.0 percent base case would hide the distribution lock and concentration in early merchant cashflow.
Primary and standards sources used in this course
Detailed Course assessment
Answer every question before submitting. Correct answers and rationales appear only after the complete attempt.
Detailed CourseQuestion 1 of 20