Hi Soheb,
SAM has a separate battery life model that calculates the degradation in battery capacity over time that accounts for number of charge/discharge cycles, depth of discharge, battery temperature, and battery age, so you do not need to specify a degradation rate input to account for the battery.
The "Battery relative capacity to nameplate" (batt_capacity_percent) variable indicates the battery degradation over time. Note that this is a time series variable with a value for each time step. If you include battery replacements in your analysis, the battery capacity is restored to its nameplate value when the battery is replaced.
The time series "Electricity to grid" and "Electricity to grid from battery" outputs are (year1_hourly_e_togrid and batt_to_grid, respectively).
One way to find the names of SSC variables is to first find them on the Data Tables tab in SAM, and then open a script editor and use the script editor's variable browser to match the SAM variable name to the SSC name:
- Start SAM and open a file or create a new one.
- On the File menu, click New script to open the script editor.
- Click Variables in the menu bar at the top of the script editor.
- In the Search box, type the name of the variable label as you see it in SAM (for example "Electricity to grid from battery").
- Find the variable in the list -- variables are sorted by inputs and outputs and by type, and get the equivalent SSC Variable name (for example batt_to_grid).
Best regards,
Paul.