Storage System 🔋

The Storage Systems page lists all storage systems that can be chosen for a simulation. Any simulation 🎛️ can work with one storage system 🔋.

The Storage Systems page lists all storage systems created by the user.

Storage Systems Page

Each storage system is modeled under seven main categories of parameters:

Description 📝

Scenario Name: The name you want to display for the storage system in the storage system list. This name must be unique. Description: A text box where you can enter a description for the storage system. It can hold up to 140 characters.

Financial Metrics 💵

Duration of Pre-Operational Phase: Indicates the number of years the storage system is under construction and not operational. It represents the time before the storage system becomes productive. Operational Lifespan of Balance of System: The period after which the Balance of System is no longer functional and must be decommissioned. Depreciation Years for Energy Storage Components: The number of years over which CAPEX for Energy Storage Components will be amortized in the P&L statement. Depreciation Years for Storage Balance System: The number of years over which the CAPEX for the storage balance system will be amortized in the P&L statement. Full Equity : The project is entirely funded by the owner's capital without any loans. This method avoids interest expenses but requires a higher initial investment. Loan Financing : The project is partially funded through loans, with the remainder covered by equity. This method leverages borrowing to reduce upfront costs but incurs interest expenses over the repayment period. a. Loan-to-CAPEX Ratio (%) : The percentage of the total capital expenditure (CAPEX) financed through a loan. This determines how much of the project’s cost is covered by borrowing rather than equity. b. Loan Repayment Period (Year) :The duration, in years, over which the loan will be repaid. A longer period results in smaller annual payments but higher total interest. c. Annual Interest Expense ($) :The yearly cost of interest paid on the borrowed loan amount. This value does not include the principal repayment but represents the additional interest accrued for each year of the loan repayment period. Energy Storage Components: The initial investment cost of the Energy Storage Components in $/MW or $. Power Conversion Components: The initial investment cost of the power conversion components, measured in $/MW or $. Balance of System: The initial investment cost of the balance of system, measured in $/MW or $. OPEX per Year: The annual operating expense (OPEX) of the storage system, measured in $.

Battery Capability 🔋

Rated Power: The maximum amount of power the battery can continuously provide over a specified period, measured in MW. Minimum Allowed State of Health: The lowest state of health percentage the model will accept before deciding to replace the storage modules. Rated Capacity: The total Amp-hours available when the battery is discharged at a specific discharge current (C-rate) from 100% state-of-charge to the cut-off voltage. Internal Battery Voltage: The nominal voltage value of the battery, measured in V. Rated Energy: The total Watt-hours available when the battery is discharged at a specific discharge current (C-rate) from 100% state-of-charge to the cut-off voltage. Min Allowed State of Charge (SoC): The minimum allowable state of charge for the battery, expressed as a percentage. Max Allowed State of Charge (SoC): The maximum allowable state of charge for the battery, expressed as a percentage. Battery Round Trip Efficiency: The efficiency rate indicating the amount of energy lost during the charging and subsequent discharging of the battery, expressed as a percentage. Power Conversion Unit Efficiency: The efficiency of the conversion unit that conditions energy for battery use, expressed as a percentage. Inverter Efficiency: The efficiency of the inverter that converts DC energy to AC energy, expressed as a percentage. Net Overall Round-Trip Efficiency: The overall efficiency of the energy storage system, including essential elements like temperature control systems, cables, and connectors, expressed as a percentage.

Rate Capability ⚡

Min Allowed C-Rate: The minimum C-rate allowed for charging/discharging the battery. Max Allowed C-Rate: The maximum C-rate allowed for charging/discharging the battery. Type: The usage type of the specific C-rate. C-Rate: The rate at which the battery is charged or discharged over an hour. Cycle Time: The number of cycles the battery can perform at a specific C-rate over its lifetime. Round-Trip Efficiency: The efficiency rate indicating how much energy is recovered when the battery is charged and then discharged. Add C Rate: Click this button to add a new C-rate.

Cycle Life 🔄

Calendar Aging: Recommended when expected cycle depths and current rates are low or operational periods are shorter than idle periods. DoD: Depth of Discharge (DoD) parameters for battery life management. Cycle Number: The number of cycles the battery can undergo before replacement is needed. Add Cycle: Click this button to add a new cycle.

Grid Actions 🔌

Grid Power Outflow Constraint: The limit for power export to the grid, measured in MW. Energy Distribution Fee of Sold Energy: The cost charged for injecting electricity into the grid, measured in $/MWh. Grid Power Inflow Constraint: The limit for power import from the grid, measured in MW. Energy Distribution Fee of Purchased Energy: The cost charged for withdrawing electricity from the grid, measured in $/MWh.

Ancillary Services ⚙️

Capacity Reserved for PFC: The percentage of battery capacity reserved for PFC during the specified block hours. Capacity Reserved for SFC: The percentage of battery capacity reserved for SFC during the specified block hours.