The Levelised Cost of Energy: A Comprehensive Benchmark for Sustainable Energy Planning

Strategic Insights -

The Levelised Cost of Energy (LCOE) serves as a crucial benchmark for evaluating the cost-effectiveness of various electricity generation technologies. Calculated by dividing the total lifetime costs of a power-generating facility by its total energy production, LCOE provides a standardized basis for comparing the costs of solar farms, wind turbines, battery storage facilities, gas-to-power plants, and nuclear reactors. Despite its widespread use, LCOE has limitations, particularly in the context of evolving energy systems and grid complexities.

Key Takeaways:

  • The LCOE for utility-scale solar PV in the US ranges from $37 to $44/MWh, while onshore wind spans $37 to $66/MWh, surpassing unsubsidized costs for gas combined-cycle plants ($48 to $109/MWh) and coal ($109 to $157/MWh).
  • Nuclear power remains the costliest option, ranging from $141 to $251/MWh.
  • When considering full tax incentives, such as the Investment Tax Credit (ITC) and Production Tax Credit (PTC), utility-scale solar can fall to just $15 to $24/MWh.
  • LCOE does not account for unplanned intermittency, the variability of renewable energy, or the cost of integrating renewables into the grid.
  • The Cost of Firming Intermittency is a critical addition to LCOE, highlighting the extra cost of ensuring reliability when using solar, wind, or hybrid systems.
  • Lazard's 2025 report reveals that a $40 to $60 per ton carbon price adds up to $60/MWh to coal and gas costs, further improving the competitiveness of zero-carbon technologies.
  • The Levelised Cost of Storage (LCOS) is crucial for understanding long-term grid economics, with costs declining across the board due to technological advancements and oversupply of battery cells.

Statistics:

  • The LCOE for utility-scale solar PV in the US: $37 to $44/MWh
  • The LCOE for onshore wind in the US: $37 to $66/MWh
  • The LCOE for gas combined-cycle plants in the US: $48 to $109/MWh
  • The LCOE for coal in the US: $109 to $157/MWh
  • The LCOE for nuclear power in the US: $141 to $251/MWh
  • Unsubsidized LCOS for a 100 MW, 4-hour battery system: $132/MWh
  • Tax-incentivized LCOS for a 100 MW, 4-hour battery system: $83/MWh
  • The carbon price adds up to $60/MWh to coal and gas costs

Sources:

  • Lazard's 2025 LCOE+ report
  • Lazard's Levelised Cost of Storage (LCOS) report
  • EE Business Intelligence (Pty) Ltd. (2025)
  • Full report (1.8 MB PDF): [https://www.eebusinessintelligence.com/2025-report/](https://www.eebusinessintelligence.com/2025-report/)