Professional tool for calculating levelised cost of energy (LCOE) for renewable energy projects. Used for investment appraisal and policy analysis.
Calculate levelised cost of renewable energy generation
LCOE calculation uses standard NPV methodology. Excludes transmission, balancing, and grid integration costs.
LCOE (Levelised Cost of Energy) is the average cost per unit of electricity generated over a project's lifetime, accounting for upfront capital costs, operating expenses, and the time value of money.
LCOE answers the question: "What is the average cost to produce one megawatt-hour (MWh) of electricity from this renewable energy project over its lifetime?" It combines two types of costs: upfront capital (building the plant) and ongoing operations (maintenance, land lease, staff). LCOE factors in the time value of money—a pound spent today counts more than a pound spent in 20 years—using a discount rate (usually 7% for renewable energy projects).
LCOE is NOT the cost to consumers; transmission, storage, and grid balancing costs are added on top. It's used by investors, governments, and policy-makers to compare different technologies and decide where to invest. Lower LCOE technologies are more competitive in markets with subsidies or price guarantees (like the UK's Contracts for Difference).
Why Has Wind LCOE Fallen So Much? Offshore wind LCOE fell 70% between 2012 and 2024 because: (1) Turbine costs fell 50% (larger, more efficient turbines). (2) Installation costs fell (experience, competition, specialised vessels). (3) Operations improved (fewer breakdowns, predictive maintenance). (4) Financing costs fell (lower interest rates, more risk capital). Modern offshore turbines are 12+ MW per unit versus 2–3 MW in 2012, increasing efficiency per turbine by 6x. The UK now has world-leading offshore wind LCOE at £60–90/MWh.
What's Not Included in LCOE? LCOE excludes: transmission and distribution network costs to get electricity to consumers, balancing services (keeping grid frequency steady), backup capacity (what to do when the wind isn't blowing), and social/environmental costs or benefits. LCOS (Levelised Cost of Storage) is a related metric for battery projects.
LCOE Formula: LCOE = Σ(Capex_t + Opex_t) / (1+r)^t ÷ Σ(Energy_t) / (1+r)^t, where t is year, r is discount rate, Capex and Opex are in year t, Energy is generation in year t. Simplified: LCOE = (Total PV of costs) / (Total PV of generation). Units: £/MWh.
Capital Recovery Factor (CRF): For projects with uniform annual costs, CRF = r(1+r)^n / [(1+r)^n - 1], where r is discount rate and n is project life. CRF converts upfront CapEx into equivalent annual costs. Example: £1,500/kW at 7% discount, 25-year life, CRF ≈ 0.091, = £136.5/kW/yr equivalent annual capital cost. CapEx is typically 60–80% of total levelised cost; OpEx is 20–40%.
Real vs Nominal LCOE: Real LCOE adjusts for inflation; nominal LCOE does not. Most UK renewable analyses use real (2012 money) LCOE for consistency. If using nominal discount rates (6–8%), use nominal LCOE. If using real discount rates (3–5%), use real LCOE. CfD strike prices are in 2012 real terms for consistency with government projections.
Capacity Factor (CF) Sensitivity: CF is the most sensitive variable in LCOE. CF = Annual generation / (Capacity × 8,760 hours). Offshore wind 42–52%, onshore 25–35%, utility solar 10–12% in UK. A 5% change in CF changes LCOE by ~10%. P50 yield (50% probability of achieving or exceeding) is used for conservative estimates; P90 (90% confidence) for optimistic cases. Variance driven by wind resource (Weibull distribution), shading (solar), availability, and system losses.
Technology Benchmarks (2024, 2012 real £): Offshore wind: £60–90/MWh (was £160 in 2012). Onshore wind: £45–65/MWh (was £85). Utility solar: £40–65/MWh (was £280). Nuclear (new build): £100–150/MWh. Gas CCGT (without carbon cost): £60–80/MWh. Onshore wind and solar have achieved grid parity (LCOE below wholesale market prices) in most markets.
System LCOE vs Plant LCOE: Plant-level LCOE (above) excludes grid integration costs. System LCOE adds transmission, balancing, and backup. At high penetrations of variable renewables (>50% wind+solar), system LCOE increases by 20–50% due to the need for storage and network investment. The UK CCC estimates system LCOE for 80% renewables scenarios at £80–120/MWh including flexibility costs.