Clarify SAM-EM Add-ons limitations. Deeplink to add-ons section of documentation from example_SAM-single-owner-PPA-3 description.

Author: softwareengineerprogrammer

docs/SAM-Economic-Models.md

@@ -51,7 +51,7 @@ The following table describes how GEOPHIRES parameters are transformed into SAM
 1. Only Electricity end-use is supported
 2. Only 1 construction year is supported. Note that the `Inflation Rate During Construction` parameter can be used to
    partially account for longer construction periods.
-3. Add-ons electricity and heat are not currently supported. (Add-ons CAPEX, OPEX, and profit are supported.)
+3. Add-ons with electricity and heat are not currently supported. (Add-ons CAPEX, OPEX, and profit are supported.)
 
 ## Using SAM Economic Models with Existing GEOPHIRES Inputs
 
@@ -146,6 +146,9 @@ Total Add-on CAPEX is added to Total CAPEX.
 Total Add-on OPEX is added to Total operating and maintenance costs.
 Total AddOn Profit Gained per year is treated as fixed amount Capacity payment revenue.
 
+Add-ons CAPEX, OPEX, and profit are supported.
+Add-ons with electricity and heat are not currently supported, but may be supported in the future.
+
 ## Examples
 
 ### SAM Single Owner PPA: 50 MWe

tests/examples/example_SAM-single-owner-PPA-3.txt

@@ -1,6 +1,6 @@
 # Example: SAM Single Owner PPA Economic Model: 50 MWe with Add-Ons
 # This example models example_SAM-single-owner with a Waste Heat Absorption Chiller Add-on
-# See "SAM Economic Models" in GEOPHIRES documentation: https://nrel.github.io/GEOPHIRES-X/SAM-Economic-Models.html
+# See "SAM Economic Models" in GEOPHIRES documentation: https://nrel.github.io/GEOPHIRES-X/SAM-Economic-Models.html#add-ons
 
 # *** ADD-ONS ***
 # ***************