From c5d318d978da65e72914686b3facfd1d19a0af64 Mon Sep 17 00:00:00 2001
From: adfarth <adfarthing1@gmail.com>
Date: Thu, 1 Oct 2026 15:32:25 -0600
Subject: [PATCH] add outage_production_fraction

---
 CHANGELOG.md                                  |  5 ++++
 ...uts_outage_production_fraction_and_more.py | 24 +++++++++++++++++++
 reoptjl/models.py                             | 19 +++++++++++++++
 reoptjl/test/posts/all_inputs_test.json       |  6 +++--
 4 files changed, 52 insertions(+), 2 deletions(-)
 create mode 100644 reoptjl/migrations/0126_pvinputs_outage_production_fraction_and_more.py

diff --git a/CHANGELOG.md b/CHANGELOG.md
index fb9f0135e..3c4610eae 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -26,6 +26,11 @@ Classify the change according to the following categories:
     ##### Removed
     ### Patches
 
+## add-outage-prod-option
+### Minor Updates
+#### Added
+- Inputs **PV.outage_production_fraction** and **Wind.outage_production_fraction** to optionally reduce production during modeled outages. Only applies with multiple outage modeling using inputs outage_start_time_steps and outage_durations.
+
 ## v3.23.0
 ### Minor Updates
 ##### Changed
diff --git a/reoptjl/migrations/0126_pvinputs_outage_production_fraction_and_more.py b/reoptjl/migrations/0126_pvinputs_outage_production_fraction_and_more.py
new file mode 100644
index 000000000..e2245c4e3
--- /dev/null
+++ b/reoptjl/migrations/0126_pvinputs_outage_production_fraction_and_more.py
@@ -0,0 +1,24 @@
+# Generated by Django 4.2.26 on 2026-10-01 21:31
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('reoptjl', '0125_chpoutputs_annual_thermal_curtailed_mmbtu_and_more'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='pvinputs',
+            name='outage_production_fraction',
+            field=models.FloatField(blank=True, default=1.0, help_text='Fraction of production available during outages. Only applies with multiple outage modeling using inputs outage_start_time_steps and outage_durations.', validators=[django.core.validators.MinValueValidator(0), django.core.validators.MaxValueValidator(1.0)]),
+        ),
+        migrations.AddField(
+            model_name='windinputs',
+            name='outage_production_fraction',
+            field=models.FloatField(blank=True, default=1.0, help_text='Fraction of production available during outages. Only applies with multiple outage modeling using inputs outage_start_time_steps and outage_durations.', validators=[django.core.validators.MinValueValidator(0), django.core.validators.MaxValueValidator(1.0)]),
+        ),
+    ]
diff --git a/reoptjl/models.py b/reoptjl/models.py
index 32f69e66d..de54216c7 100644
--- a/reoptjl/models.py
+++ b/reoptjl/models.py
@@ -3284,6 +3284,16 @@ class PV_LOCATION_CHOICES(models.TextChoices):
                 "Required operating reserves applied to each timestep as a fraction of PV generation serving load in that timestep.")
     )
 
+    outage_production_fraction = models.FloatField(
+        validators=[
+            MinValueValidator(0),
+            MaxValueValidator(1.0)
+        ],
+        blank=True,
+        default=1.0,
+        help_text=("Fraction of production available during outages. Only applies with multiple outage modeling using inputs outage_start_time_steps and outage_durations.")
+    )
+
 
 class PVOutputs(BaseModel, models.Model):
     key = "PVOutputs"
@@ -3624,6 +3634,15 @@ class WIND_SIZE_CLASS_CHOICES(models.TextChoices):
         blank=True,
         help_text="Land area required per kW of wind capacity in acres/kW; only constrained by this for systems greater than 1500 kW"
     )
+    outage_production_fraction = models.FloatField(
+        validators=[
+            MinValueValidator(0),
+            MaxValueValidator(1.0)
+        ],
+        blank=True,
+        default=1.0,
+        help_text=("Fraction of production available during outages. Only applies with multiple outage modeling using inputs outage_start_time_steps and outage_durations.")
+    )
 
     def clean(self):
         if self.size_class != "" and self.installed_cost_per_kw is None:
diff --git a/reoptjl/test/posts/all_inputs_test.json b/reoptjl/test/posts/all_inputs_test.json
index e72fbdbc1..78447cda0 100644
--- a/reoptjl/test/posts/all_inputs_test.json
+++ b/reoptjl/test/posts/all_inputs_test.json
@@ -115,7 +115,8 @@
         "can_wholesale": true,
         "can_export_beyond_nem_limit": true,
         "can_curtail": true,
-        "operating_reserve_required_fraction": 0.0
+        "operating_reserve_required_fraction": 0.0,
+        "outage_production_fraction": 1.0
     },
     "Meta": {
         "description": "",
@@ -269,7 +270,8 @@
         "can_export_beyond_nem_limit": true,
         "can_curtail": true,
         "operating_reserve_required_fraction": 0.0,
-        "acres_per_kw": 0.03
+        "acres_per_kw": 0.03,
+        "outage_production_fraction": 1.0
     },
     "ExistingBoiler": {
         "production_type": "hot_water",