From da2b1de497d5b00781b60a78ffbae563e9ce37e2 Mon Sep 17 00:00:00 2001
From: aspeake <andrew.speake@nrel.gov>
Date: Wed, 8 Jan 2025 18:01:25 -0700
Subject: [PATCH] New parameter to scale EV efficiency

---
 measures/ResStockArguments/measure.rb             | 11 +++++++++++
 measures/ResStockArguments/resources/constants.rb |  2 --
 resources/options_lookup.tsv                      |  1 +
 3 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/measures/ResStockArguments/measure.rb b/measures/ResStockArguments/measure.rb
index c9e1a57260..ee1f8d08a0 100644
--- a/measures/ResStockArguments/measure.rb
+++ b/measures/ResStockArguments/measure.rb
@@ -404,6 +404,12 @@ def arguments(model)
     arg.setUnits('hours')
     args << arg
 
+    arg = OpenStudio::Measure::OSArgument::makeDoubleArgument('ev_efficiency_percent_increase', false)
+    arg.setDisplayName('Electric Vehicle: Efficiency Improvement')
+    arg.setDescription('The increase (%) in efficiency of the electric vehicle.')
+    arg.setUnits('hours')
+    args << arg
+
     return args
   end
 
@@ -857,6 +863,11 @@ def run(model, runner, user_arguments)
       args[:ev_hours_per_week] = (hours_per_year / UnitConversions.convert(1, 'yr', 'day')) * 7
     end
 
+    if not args[:ev_efficiency_percent_increase].nil?
+      # Adjust efficiency (in kWh/mile) to reflect a percentage improvement in efficiency.
+      args[:ev_energy_efficiency] = args[:ev_energy_efficiency] / (1 + args[:ev_efficiency_percent_increase])
+    end
+
     args.each do |arg_name, arg_value|
       if args_to_delete.include?(arg_name) || (arg_value == Constants::Auto)
         arg_value = '' # don't assign these to BuildResidentialHPXML or BuildResidentialScheduleFile
diff --git a/measures/ResStockArguments/resources/constants.rb b/measures/ResStockArguments/resources/constants.rb
index 9086264607..ad0db16943 100644
--- a/measures/ResStockArguments/resources/constants.rb
+++ b/measures/ResStockArguments/resources/constants.rb
@@ -57,8 +57,6 @@ module Constants
                                    'emissions_wood_values',
                                    'emissions_coal_values',
                                    'emissions_wood_pellets_values',
-                                   'ev_battery_capacity',
-                                   'ev_battery_discharge_power',
                                    'ev_hours_per_week',
                                    'misc_plug_loads_vehicle_2_usage_multiplier',
                                    'misc_plug_loads_vehicle_annual_kwh',
diff --git a/resources/options_lookup.tsv b/resources/options_lookup.tsv
index eaa05cc42d..1ac21608da 100644
--- a/resources/options_lookup.tsv
+++ b/resources/options_lookup.tsv
@@ -9287,6 +9287,7 @@ Electric Vehicle Outlet Access	Yes
 Electric Vehicle Ownership	No	ResStockArguments	ev_battery_present=false
 Electric Vehicle Ownership	Void
 Electric Vehicle Ownership	Yes	ResStockArguments	ev_battery_present=true
+Electric Vehicle Efficiency Increase	15%	ResStockArguments	ev_efficiency_percent_increase=0.15
 Energystar Climate Zone 2023	North-Central
 Energystar Climate Zone 2023	Northern
 Energystar Climate Zone 2023	South-Central