Fixes #880, #694

O&M Costs

For fuel cell model, disable battery O&M cost inputs when battery not enabled, and display a UI message if those inputs are set to non-zero by a script or opening an old file. This is not enforced in SSC, so SDK users could model battery O&M costs for a system with no batteries.

Set default fuel cell O&M cost by capacity and replacement cost to zero so that battery O&M cost is not included in operating expenses when battery is disabled. This changes the default LCOE for Fuel Cell configurations, so requires running test script.

Fix variable O&M for FOM and BTM with battery configurations.

Cash flow

Fix fuel cell fuel in cash flow: Export SAM cash flow instead of calculating in Excel from heat rate inputs, which works for CSP and other fuel techs, but not for fuel cell.

Show LCOS calculations in cash flow for all battery configs, not just "has_roe()" configs.

Remove has_roe flag from cash flow script because we removed ROE metric in #549

Fix LCOS cash flow equations in Excel.

Fix land lease send to excel for techs with no land area.

Add support for sculpted debt with debt size limit.

Energy Line Items

Add cf_energy_sales to outputs for all financial models.

Change labels on Results page Summary and Losses tab from "energy" to "electricity."

Other

Update urdb_view_rate URL to https://apps.openei.org/IURDB, also fixed in sam-private https://github.com/NREL/SAM-private/commit/af6e99209ef7877496c00a1a39cb786a752b5ab2

UI labels and group names for om_opt_fuel_xxx inputs on Biopower feedstock costs form.

UI group name for Fuel Cell Costs UI form.

Set total_land_area for CSP models for financial model inputs:

• Empirical Trough, replace ui_total_land_area with total_land_area

• Tower Solar Field, Linear Fresnel Solar Field, Generic CSP Solar Field, LF DSG Solar Field: Add total_land_area input and UI equation to store value of csp.pt.sf.total_land_area

• Add total_land_area default for MSPT, DSLF, Generic CSP System, DSGL IPH