Technical Classification
Definition
Lazard Levelized Cost of Storage (LCOS) -- standardized calculation of storage electricity costs for various technologies and use cases. Compares Li-ion BESS with pumped hydro, compressed air and hydrogen for peaking, frequency response and transmission deferral.
Technical Background
LCOS is calculated from CAPEX, OPEX, degradation, financing costs and cycle utilization over the project lifetime. Li-ion BESS achieves 10-18 ct/kWh depending on use case. 4-hour systems for peaking: 12-15 ct/kWh. Short-duration storage for frequency regulation: 8-12 ct/kWh. The methodology normalizes different technologies to comparable metrics.
Risks
LCOS is theoretical -- actual revenues depend on market price volatility. Degradation assumptions may deviate from real-world operation (aggressive cycling vs. conservative). WACC sensitivity: 1% interest rate change = approx. 8-10% LCOS change. Augmentation costs often underestimated.
Standards & Regulations
No unified LCOS standard. Lazard methodology as industry standard. IEC TS 62933-4-1 (Environmental Issues). IRENA methodology for international comparisons. VDI 2067 (Cost-effectiveness of building services systems) as German reference.
Testing Methods
Discounted cash flow analysis over project lifetime (20-25 years). Degradation modeling (calendar + cyclic). Sensitivity analysis for WACC, CAPEX, cycle count. Scenario comparison of different use cases with varying cycling profiles.
Common Deficiencies
Lack of consideration of revenue stacking (LCOS examines only one use case). No representation of grid fees and regulatory costs in US-centric methodology. Degradation models often too optimistic. Residual value at end of life unclear.
Relevance for Investors, Insurers & Operators
Investors: economic comparison between storage technologies and use cases. Insurers: assessment of economic viability over project lifetime. Operators: optimization of operating strategy for LCOS-minimizing cycling.
Assessment by PV-BESS-Assessor
The Lazard LCOS study is, alongside NREL, the second key reference for the economic assessment of storage technologies. The comparison across different use cases (peaking, frequency response, transmission deferral) is unique.
Implications for Investors
Indispensable for evaluating revenue stacking strategies: Lazard shows in which use cases Li-ion BESS is competitive. LCOS ranges (10-18 ct/kWh) enable realistic revenue assessment.
Implications for Assessments
PV-BESS-Assessor uses the Lazard methodology as a reference for LCOS calculations in economic assessments. The use-case differentiation enables precise evaluation of specific revenue streams.
Technical Risks
LCOS is a theoretical concept -- actual revenues depend on market prices. Degradation and cycle utilization significantly affect real-world LCOS. Financing costs vary considerably.
Regulatory Significance
LCOS comparisons are used in policy discussions on competitiveness. Relevant for auction design and capacity remuneration.
Conclusion by PV-BESS-Assessor
PV-BESS-Assessor recommends Lazard as the standard reference for LCOS comparisons. For German projects, grid fees and regulatory requirements must be considered as additional LCOS components.
Last updated: 2026-06-16