How is energy storage capacity calculated?

The energy storage capacity, E, is calculated using the efficiency calculated above to represent energy losses in the BESS itself. This is an approximation since actual battery efficiency will depend on operating parameters such as charge/discharge rate (Amps) and temperature.

Can a financial analysis undervalue an electric-generating asset?

Alan Kwan was supported in part by an appointment to the Research Participation Program at EERE, administered by the Oak Ridge Institute for Science and Education. Financial analyses that do not capture the full value across the entire lifetime of an electric-generating asset may undervalue the asset.

Should a thermal or hydroelectric generation asset be extended?

Extending the life of thermal or hydroelectric generation assets typically requires minor or major upgrades, but the cost of such extensions—which may include increased nameplate capacity—has often been more attractive on a present-value basis than the alternative of complete replacement with the same technology or a different technology.

Are pumped hydro energy storage projects repowering?

Deane et al. (2010) also note that “trends for new PHES [pumped hydro energy storage] development generally show that developers operating in liberalized markets are tending to repower, enhance projects or build ‘pump-back’ PHES rather than traditional ‘pure pumped storage.’” Nuclear plant uprated.

How do you evaluate efficiency and demonstrated capacity of a Bess sub-system?

Evaluate Efficiency and Demonstrated Capacity of the BESS sub-system using the new method of this report. Compare actual realized Utility Energy Consumption (kWh/year) and Cost ($/year) with Utility Consumption and Cost as estimated using NREL’s REopt or System Advisor Model (SAM) computer programs.

Are electric generation assets undervalued?

Financial analyses that do not capture the full value across the entire lifetime of an electric-generating asset may undervalue the asset. When the asset is new, its electric generation is often contracted to be sold for a specified period at a predetermined rate.