The peak shaving dispatch options attempt to discharge the battery during times of peak demand over a forecast period. Peak shaving dispatch considers the load, and either the available solar resource for PV systems, or the AC output for other systems over the forecast period and calculates a grid power target for each time step in that period. It then charges or discharges the battery as possible given the battery's capacity and state of charge to meet the target. Use this option to reduce monthly demand charges when the rates on the Electricity Rates page include demand rates.

Peak shaving discharges the battery each day to reduce that day's peak load. This results in more battery cycling than would result from a dispatch strategy that discharges the battery once a month to reduce the peak load.

For a detailed description of the behind-the-meter peak shaving dispatch algorithm, see DiOrio, N. (2017). An Overview of the Automated Dispatch Controller Algorithms in SAM. NREL/TP-6A20-68614. (PDF 770 KB)

Peak Shaving Option

One day look ahead (perfect)

For each day, dispatch the battery based on the solar resource over the next 24 hours and the load over the forecast horizon specified below. The look-ahead option is a perfect prediction of the load and solar resource because the battery dispatch coincides with the solar resource and load.

One day look behind

Similar to the one-day look ahead option, but based on the previous 24 hours of solar resource for the prediction. The look-behind option adds some uncertainty to the dispatch because the battery dispatch coincides with solar resource for the previous day, so the battery dispatch for each day may not exactly match the solar resource.

Note. SAM allows you to use a different forecast period for the solar resource and the load. Choose both a peak shaving option and a load forecast horizon option as appropriate for your analysis.

Custom forecast

Combines one day look ahead dispatch with a different weather file than the one used for the photovoltaic system simulation. This makes the dispatch more realistic because the battery dispatch does not exactly match the the photovoltaic system output.

For the custom forecast option, click Browse to choose the a weather file to use for battery dispatch.

Load Forecast Horizon

Perfect look ahead

For each day, dispatch the battery based on the load specified on the Electric Load page over the next 24 hours and the solar resource over the period specified above.

One day look behind

Similar to perfect look ahead, but based on the previous 24 hours of load data.

Look ahead to custom load

Similar to perfect look ahead, but dispatches the battery based on different load data than the data on the Electric Load page.

Custom load profile

For the Look Ahead to Custom Load Forecast option, the load data to use for the dispatch forecast instead of the data on the Electric Load page.

Click Edit array to import or paste custom load data for the dispatch forecast.

Match load growth

For the Look Ahead to Custom Load Forecast option, use the same load growth rate for the forecast load as the load data on the Electric Load page.

Enter custom growth

For the Look ahead to Custom Load Forecast option, use a different load growth rate than the load data on the Electric Load page.

Load forecast growth rate

For the Look Ahead to Custom Load forecast option with Enter Custom Growth, the annual growth rate for the custom load profile.

The input grid power target option is similar to the peak shaving option, except that it attempts to operate the battery in response to grid power targets that you specify instead of automatically calculating the targets to reduce peak demand. In each time step, SAM compares the electric load to the power target, charges the battery when the load is less than the target, and discharges when the load is greater than the target. You can specify either twelve constant monthly targets, or a target for each time step.

Note. The system may not always be able to meet the grid power targets, for example, if the battery is discharged when the photovoltaic array or other power source is not generating power.

Choose Input grid power targets, and then choose either Monthly power targets or Time series power targets:

Monthly power targets

Choose this option to specify a either a single grid power target for the entire year by setting the grid power target for all months to the same value, or a different grid power target for each month.

For Monthly grid power targets, Click Edit values to specify the targets. To apply a single target to the entire year, enter the target as a single value in the Edit Values window and click Apply.

Time series power targets

Choose this option to enter a grid power target for each time step in the simulation. For Time series grid power targets, click Edit array to specify the targets.

The input battery power targets option operates the battery in response to battery power targets you specify. In each time step, the controller attempts to charge to the negative power value you enter, or discharge to the positive power value you enter.

Choose Input battery power targets, and then enter the battery power target data.

Time series battery power targets

Click Edit array and import or copy and paste an array of battery power values in kW, where discharge power is positive, charge power is negative. The array must have the same number of rows as simulation time steps: For hourly simulations, 8,760 rows, for for 15-minute simulations 35,040 rows, etc.

Note. For standalone batteries, the time step for time series power targets must be the same as the simulation time step, which you can set on the Battery Time Step page.

For the manual dispatch option, you specify the timing of battery charges and discharges using up to six dispatch periods and a set of weekday and weekend hourly profiles by month under Manual Dispatch.

Charge from system

For each period that you want to allow the battery to be charged by power from the system, check the box in the Charge from system column.

Charge from grid

For each period that you want to allow the battery to be charged by power from the grid, check the box in the Allow column, and specify the percentage of the battery's state of charge that can be charged from the grid over the time step in the Rate column.

For example, for hourly simulations, a charge rate of 25% would allow the battery to charge from the grid at 25% of its state of charge at the beginning of the time step over the time step. The purpose of this rate is to avoid damaging the battery by charging it too quickly.

Note. For subhourly simulations, the charge and discharge percentages apply to the subhourly time step even though the periods are defined in hours.

For a behind-the-meter application, if Charge from grid and Charge from system are both checked for a given period, and if in a time step in that period the system power is greater than the load, power from the grid supplements the system power to meet the battery charge requirement.

If Charge from grid and one or both of the discharge options is also checked for a given period, and if in that period the battery state of charge is above the minimum state of charge, the battery discharges until it reaches the minimum state of charge, at which point it starts charging from the grid, either until it reaches the maximum state of charge, or until the time period changes to one that does not allow charging from the grid.

Discharge to load

For each period that you want to allow the battery to discharge to the load, check the box in the Allow column, and specify the percentage of the battery's available charge that can be discharged to the load over the time step in the Rate column.

For example, let's assume that Period 3 is the four consecutive hours between 3 pm and 6 pm, the discharge rate is 25%, and the minimum and maximum state of charge limits under Charge Limits and Priority are 30% and 96%, respectively. For an hourly simulation, that would allow up to 25% of the battery state of charge at the beginning of the 3 pm hour to be discharged over the hour. For the 4 pm hour, 25% of the charge at the end of the 3 pm hour would be available, and so on until the end of Period 3. The 25% discharge rate would result in the battery being fully discharged over the four-hour period. (A 20% value would have the same effect for a 5-hour period, i.e., if Period 3 were between 3 pm and 7 pm.)

For a one-minute simulation, a discharge rate of 25% would allow up to 25% of the available charge to be dispatched every minute over Period 3, so a smaller percentage would be required to allow the battery to discharge over the full four-hour period.

Discharge to grid

The battery can only discharge to the grid during time steps that it is allowed to discharge to the load. For each period that you want to allow the battery to discharge to the grid, check the box in the Allow column. SAM uses the same discharge rate for discharges to the load and the grid.

System power priority

Use this option to determine how to prioritize electricity from the power generating system (PV array or custom generation profile). This option is not available with the Charge from system only when system output exceeds load option.

Choose Meet load to prioritize using system power to meet the load over charging the battery.

Choose Charge battery to prioritize using system power to charge the battery over meeting the load.

Weekday and Weekend Schedules

The weekday and weekend schedules determine the hour of day and month of year for each of the up to six dispatch periods. SAM ignores the charge and discharge options for any periods that you do not assign to the weekday or weekend schedules.

To define the hour of day and month of year that each period applies, use your mouse to select a rectangle in the schedule matrix, and use your keyboard to type the period number (1-6). The number you type should appear in the rectangle.

See Weekday Weekend Schedules for a step-by-step description of how to use the schedule matrices.

Copy Schedules from TOU/TOD Schedules

Use this button to copy the the weekday and weekend schedules from the energy charge time-of-use schedule on the Electricity Rates page.

The retail rate dispatch option operates the battery to minimize the electricity bill based on an estimate of retail electricity price that represents the cost to the system owner of purchasing electricity from the grid in each time step. For this option, battery dispatch depends on:

•A rolling 24-hour forecast of system power generation and load as defined under Generation Forecast Horizon.

•Energy and demand rates (flat, time-of-use, and/or tiered)

•Battery state of charge and available capacity

•Battery degradation

•Cost of future battery replacements

The original implementation of the retail rate dispatch option is described (as "price signal forecast") in Mirletz, B.; Guittet, D. (2021). Heuristic Dispatch Based on Price Signals for Behind-the-Meter PV-Battery Systems in the System Advisor Model. NREL/CP-7A40-79575. (PDF 2.2 MB)

Generation Forecast Horizon

The generation forecast horizon determines whether the battery dispatch responds to a perfect forecast of the system's output, or to a forecast that is different from the system's output over the forecast period.

Perfect look ahead

For each day, dispatch the battery based on the system's output over the next 24 hours.

One day look behind

Similar to perfect look ahead, but based on the system's output over the previous 24 hours. This adds some uncertainty to the dispatch because yesterday's generation profile is likely to be different from today's.

Look ahead to custom weather file

For the PV Battery configuration, use a different weather file for the generation forecast than for simulating the system's power output. Use this option when you want the battery dispatch to be more realistic by not responding exactly to the system's output.

Weather file for retail rate dispatch

The weather file to use for the Look Ahead to Custom Weather File option. Click Browse to choose a weather file in the SAM CSV format.

Load Forecast Horizon

The generation forecast horizon determines whether the battery dispatch responds to a perfect forecast of the building or facility's electric load, or to a forecast that is different from the load over the forecast period.

Perfect look ahead

For each day, dispatch the battery based on the load specified on the Electric Load page over the next 24 hours.

One day look behind

Similar to perfect look ahead, but based on the previous 24 hours of load data.

Look ahead to custom load

Similar to perfect look ahead, but dispatches the battery based on different load data than the data on the Electric Load page.

Custom load profile

For the Look Ahead to Custom Load Forecast option, the load data to use for the dispatch forecast instead of the data on the Electric Load page.

Click Edit array to import or paste custom load data for the dispatch forecast.

Match load growth

For the Look Ahead to Custom Load Forecast option, use the same load growth rate for the forecast load as the load data on the Electric Load page.

Enter custom growth

For the Look ahead to Custom Load Forecast option, use a different load growth rate than the load data on the Electric Load page.

Load forecast growth rate

For the Look Ahead to Custom Load forecast option with Enter Custom Growth, the annual growth rate for the custom load profile.

Cycle Degradation Penalty

The cycle degradation penalty is an estimate of the cost of charge-discharge cycles that makes it possible to account for the effect of cycling the battery on the cost of battery replacements. More frequent charge-discharge cycles can result in faster degradation of the battery and more replacements over the analysis period. Increasing the cycle degradation penalty causes the price signal forecast dispatch algorithm to attempt to reduce the frequency of battery charge-discharge cycles.

Note. Battery degradation and replacement parameters are on the Battery Life page.

Cycle degradation penalty method

Choose a method for estimating the cost of cycling the battery:

•Choose Calculate automatically if you want SAM to calculate the cost.

•Choose Enter penalty to enter a cost per cycle-kWh value.

If you choose the Calculate Automatically option, SAM reports the calculated penalty as Computed cycle degradation penalty in the battery time series results.

Cycle degradation penalty

The penalty in $/cycle-kWh of battery total capacity for cycling the battery. You can either enter a single value, or click to enter a different penalty for each year of the analysis period as an annual schedule.

The self-consumption dispatch option dispatches the battery to minimize power to and from the grid.

This dispatch option is equivalent to the input grid power targets dispatch option with the grid power target set to zero for all time steps.

SAM's front-of-meter automated dispatch algorithm attempts to charge and discharge the battery to maximize revenue from power sales to the grid. It calculates a battery power target for each time step, and charges or discharges the battery to attempt to meet the target, given any constraints on battery capacity and battery state of charge, and accounting for power conversion losses. Note that in some time steps, depending on the battery's state of charge and other constraints, the battery discharge power may be less than the target.

You can explore the results of the automated dispatch by comparing the output variables Electricity battery power target for automated dispatch to Electricity to/from battery. Other useful output variables include Market sell rate (year 1) representing the power prices used for battery dispatch calculations, Battery state of charge, Electricity to grid from battery,and Electricity to grid from system (for PV Battery and Custom Generation Profile - Battery configurations).

Automated battery dispatch responds to power prices that vary over time, which can be defined as a PPA price with time-of-delivery multipliers for PPA projects, or market prices for Merchant Plant projects. For batteries connected to a power system (PV Battery and Custom Generation Profile - Battery configurations), battery dispatch also responds to the availability of power from the system. Battery dispatch also accounts for the cost of cycling the battery based on a prediction of how battery cycling will affect battery degradation and replacements.

The automated dispatch options determine the time horizon over which the algorithm maximizes revenue

The automated dispatch algorithms are described in DiOrio, N.; Denholm, P.; Hobbs, W. (2020). A Model for Evaluating the Configuration and Dispatch of PV Plus Battery Power Plants. Applied Energy Vol 262 March 2020, also listed on the SAM website at https://sam.nrel.gov/battery-storage/battery-publications.html.

Notes.
 
The automated dispatch options require that you choose Specify PPA Price on the Revenue page (Financial Parameters page for Partnership Flip and Sale Leaseback financial models) because the dispatch algorithm needs to know the power price as the simulation runs. For the Specify IRR Target option, SAM does now know the PPA price until the end of the simulation.
 
Automated dispatch is designed to respond to power prices that change over time. For the power purchase agreement (PPA) financial models, you can specify power price multipliers either using weekday and weekend schedules, or by time step. (Set the PPA price to $1/kWh if you want to use $/kWh price data instead of multipliers, or set it to $0.001/kWh for $/MWh price data.)
 
The merchant plant financial model may not work well with battery storage systems because of the cleared capacity requirement.

Perfect look ahead

For each day, charge and discharge the battery based on the available power from the photovoltaic or other power source and power price to maximize revenue. For standalone batteries with no power system, charge and discharge the battery based on the power price.

The look-ahead option is a perfect prediction of available power and prices because the battery dispatch coincides with the actual power generation and prices.

One day look behind

Similar to perfect look ahead, but based on the available power and power prices in the previous 24 hours. The look-behind option adds some uncertainty to the dispatch because the battery dispatch coincides with power generation and prices for the previous day. The following illustration is for behind-the-meter storage with an electric load, but the concept is the same for a front-of-meter battery.

Custom forecast

Similar to the look ahead automated dispatch option, except use different time series data for the forecast of power available to charge the battery than that used to model the system's power output:

•For the PV Battery configuration, use a different weather file than the one on the Location and Resource page.

•For the Custom Generation Profile - Battery configuration, use a different generation profile for the forecast than the generation profile on the Power Plant page.

Note. The custom forecast option is not available for standalone batteries, which do not dispatch in response to a generation profile of a photovoltaic array or other power generating equipment.

Frequency to update dispatch

For any of the three automated dispatch options, determines how often a new dispatch decision is made.

Look ahead period

For the Perfect Look Ahead and Look Ahead to Custom Weather file options, the number of hours ahead of the current time step to use for the dispatch decision in the current time step.

Weather file for automated dispatch

For the PV Battery configuration, the weather file to use for the custom forecast option. Click Browse to choose a weather file in the SAM CSV format.

Generation profile for automated dispatch

For the Custom Generation Profile - Battery configuration, a time series generation profile (hourly or subhourly) to use for the custom forecast option. Click Edit array to import or paste a generation profile.

Cycle Degradation Penalty

The cycle degradation penalty represents the future cost of replacing the battery. It allows SAM to account for the battery replacement cost in the battery dispatch decision. For any of the automated dispatch options, choose a method for estimating the cost of cycling the battery:

•Calculate automatically if you want SAM to calculate the cost.

•Enter penalty to enter a cost per cycle-kWh value.

If you choose the Calculate Automatically option, SAM reports the calculated penalty as Computed cycle degradation penalty in the battery time series results.

Cycle degradation penalty

When you choose the "enter penalty" option for the cycle degradation penalty option, this is the penalty in $/cycle-kWh of battery total capacity for cycling the battery. You can either enter a single value, or click the button to enter a different penalty for each year of the analysis period.

The PV smoothing algorithm dispatches the battery to reduce rapid fluctuations in a photovoltaic-battery system's output that can occur on partly cloudy days.

Notes.
 
The PV smoothing algorithms requires a simulation time step of 15 minutes or smaller. For SAM's photovoltaic models, the simulation time step is determined by the temporal resolution of the weather file. You can download 15-minute and 5-minute weather data from the NREL National Solar Radiation Database by choosing the Advanced download option on the Location and Resource page, or you can convert data from an hourly weather file to subhourly time steps using the "Solar Resource Interpolation" macro.
 
When you choose the PV smoothing dispatch option, be sure to check the charge options to allow the battery to charge from the system, grid or both.
 
Simulations with PV smoothing can take several minutes to run, depending on your computer and the weather file time step.

After running a simulation, you can find results of the PV smoothing algorithm on the Results page Data Tables, Time Series, and other tabs by searching for "pv smoothing." The relevant results all start with PV smoothing.... PV smoothing outpower is the battery target power for PV smoothing algorithm: It attempts to dispatch the battery to meet the target, but constraints such as battery state of charge may prevent the target from being met in some time steps. Electricity to grid is power delivered by the PV system and/or battery to the grid, which may be subject to grid constraints or AC losses specified on the Battery Cell and System, Grid and Losses pages.

For more information about the algorithm, see:

•For an introduction to the PV Smoothing algorithm, see the "Battery Updates for Fall 2021" webinar recording available on the SAM website at https://sam.nrel.gov/battery-storage/battery-videos.html.

•The model is based on the EPRI open source project PV Ramp Rate Smoothing available on GitHub.com at https://github.com/epri-dev/PV-Ramp-Rate-Smoothing.

•For a description of the model, see Fregosi, D.; Bolen, M.; Hobbs, W. (2023) "An analysis of storage requirements and benefits of short-term forecasting for PV ramp rate mitigation" available from https://sam.nrel.gov/battery-storage/battery-publications.html.

Weather file time stamp, minutes

The temporal resolution of the currently selected weather file on the Location and Resource page. The PV smoothing algorithm requires a weather file with a time step of 15 minutes or smaller.

Ramp timestep multiplier

The ramp interval is a multiple of the simulation time step determined by the ramp timestep multiplier. For example, if the simulation time step is 5 minutes, for a ramp interval of 15 minutes, you would enter a ramp timestep multiplier value of 3.

Ramp interval, minutes

The interval used to calculate the ramp rate. The ramp rate is a change in power from one interval to the next.

Ramp Interval (minutes) = Weather File Times Step (minutes) × Ramp Timestep Multiplier

Maximum ramp rate, % of nameplate per ramp interval

The maximum change in power allowed from one ramp interval to the next as a percentage of the Nameplate for PV smoothing, or the interconnection limit from the Grid page, whichever is less.

Note. SAM uses the interconnection limit value to calculate the PV smoothing maximum ramp rate even when the interconnection limit on the Grid page is disabled. If you do not want the interconnection limit to affect PV smoothing, enable it and set it to a value much higher than the PV array nameplate capacity, and then disable it.

Battery resting SOC, %

The battery resting state of charge as a percent of its nameplate capacity.

Battery energy, kWhac

The battery's nominal capacity expressed in AC kilowatt-hours, from the Battery Cell and System page.

Battery power, kWac

The battery's nominal maximum discharge rate expressed in AC kilowatt-hours, from the Battery Cell and System page.

Battery round trip efficiency, %

An estimate of the battery's nominal round-trip efficiency, calculated from Power Converters parameters on the Battery Cell and System page. Note that SAM calculates the battery's actual round-trip efficiency during simulations and reports it in the Summary tab of the Results page.

For a DC-connected battery:

Battery Round Trip Efficiency (%) = ( DC to DC Conversion Efficiency (%) × Inverter Efficiency Cutoff (%) ) ÷ 100%

For an AC-connected battery:

Battery Round Trip Efficiency (%) = ( AC to DC Conversion Efficiency (%) × DC to AC Conversion Efficiency (%) ) ÷ 100%

Nameplate for PV smoothing, kWac

The PV array's nameplate capacity in AC kilowatts, from the System Design page.

Interconnection limit, kWac

The grid interconnection limit from the Grid page. Used to calculate the maximum ramp rate. See description above.

Enable AC upper bound

This constraint prevents the output power after PV smoothing from exceeding the AC upper bound that you specify.

AC upper bound, fraction of nameplate

When you enable AC upper bound, the system's output is limited to this fraction of Nameplate for PV smoothing.

Enable AC lower bound

This constraint prevents the system's output power after PV smoothing from falling below the AC lower bound that you specify.

AC lower bound, fraction of nameplate

When you enable AC lower bound, the system's output is

Correct up-ramp violations

Use PV smoothing to correct ramp violations when power increases from one interval to the next.

Curtail violations

Curtail up-ramp violations rather than sending excess power to the grid.

Enable short-term power forecast

Consider future power output in battery dispatch decision.

Forecasting window, periods of ramp rate intervals

The forecast period when you enable short-term power forecasts.

Perfect look ahead

For the Enable Short-term Power Forecast option, use the system output in the forecast period for the power forecast.

Look ahead to custom weather file

For the Enable Short-term Power Forecast option, base the power forecast on a different weather file than the weather file from the Location and Resource page used to simulate the system's performance.

Weather file for PV smoothing forecast

For the Look Ahead to Custom Weather File option, the weather file to use for the smoothing forecast. Click Browse to choose a weather file in the SAM CSV format for the forecast. The weather file should have the same time step as the simulation weather file.

Multipliers

The multipliers are error terms for a PI (proportional plus integral) controller.

Track PV power multiplier (kp)

Determine how aggressively to PV power. Default is 1.2.

Return to rest SOC multiplier (ki)

Determine how aggressively to return the battery to its resting state of charge. Default is 1.8.

Forecast accumulation error multiplier (kf)

Applies to the difference between the power and forecast power for the ramp rate adjustment. Default is 0.3.

Reset to defaults

Resets the three multipliers kp, ki, and kf to their default values.

For the dispatch to custom time series option, provide a time series of battery power values. SAM attempts to charge and discharge the battery to meet the battery power target values.

Time series battery power targets

Click Edit array to enter time series battery power values. A negative power value for a time step indicates the battery controller should attempt to charge the battery at the given rate in that time step. A positive power value indicates the battery should discharge.

Note. For standalone batteries, the time step for time series power targets must be the same as the simulation time step, which you can set on the Battery Time Step page.

For the manual dispatch option, you specify the timing of battery charges and discharges using up to six dispatch periods and a set of weekday and weekend hourly profiles by month under Manual Dispatch.

Charge from system

For each period that you want to allow the battery to be charged by power from the system, check the box in the Charge from system column. Charge from system is disabled for standalone batteries.

Charge from grid

For each period that you want to allow the battery to be charged by power from the grid, check the box in the Allow column, and specify the percentage of the battery's state of charge that can be charged from the grid over the time step in the Rate column.

For example, for hourly simulations, a charge rate of 25% would allow the battery to charge from the grid at 25% of its state of charge at the beginning of the time step over the time step. The purpose of this rate is to avoid damaging the battery by charging it too quickly.

Note. For subhourly simulations, the charge and discharge rates apply to the subhourly time step even though the periods are defined in hours.

If Charge from grid and the discharge option is also checked for a given period, and if in that period the battery state of charge is above the minimum state of charge, the battery discharges until it reaches the minimum state of charge, at which point it starts charging from the grid, either until it reaches the maximum state of charge, or until the time period changes to one that does not allow charging from the grid.

Discharge to grid

For each period that you want to allow the battery to discharge to the grid, check the box in the Allow column, and specify the percentage of the battery's state of charge that can be discharged to the grid over the time step in the Rate column.

For example, if Period 3 is the four consecutive hours between 3 pm and 6 pm, the discharge rate is 25%, and the charge limits are 30% and 96%, for an hourly simulation, that would allow up to 25% of the battery state of charge at the beginning of the 3 pm hour to be discharged over the hour. For the 4 pm hour, 25% of the charge at the end of the 3 pm hour would be available, and so on until the end of Period 3. The 25% value would discharge the battery over the full four-hour period. (A 20% value would have the same effect for a 5-hour period, i.e., if Period 3 were between 3 pm and 7 pm.)

For a one-minute simulation, a discharge rate of 25% would allow up to 25% of the available charge to be dispatched every minute over Period 3, so a smaller percentage would be required to allow the battery to discharge over the full four-hour period.

Weekday and Weekend Schedules

The weekday and weekend schedules determine the hour of day and month of year for each of the up to six dispatch periods. SAM ignores the charge and discharge options for any periods that you do not assign to the weekday or weekend schedules.

To define the hour of day and month of year that each period applies, use your mouse to select a rectangle in the schedule matrix, and use your keyboard to type the period number (1-6). The number you type should appear in the rectangle.

See Weekday Weekend Schedules for a step-by-step description of how to use the schedule matrices.

Copy Schedules from TOU/TOD Schedules

Use this button to copy the the weekday and weekend schedules from the time-of-delivery (TOD) schedules on the Time of Delivery or Revenue page for front-of-meter (FOM) systems. This option is not available for the Merchant Plant financial model.