From 709d4aa958cc0652b65b8874f455e527c886007a Mon Sep 17 00:00:00 2001
From: Khalim Conn-Kowlessar <kconnkowlessar@gmail.com>
Date: Mon, 12 Aug 2024 20:56:56 +0100
Subject: [PATCH] added costing method for solar thermal

---
 backend/ml_models/AnnualBillSavings.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/backend/ml_models/AnnualBillSavings.py b/backend/ml_models/AnnualBillSavings.py
index e41dd01c..3ee4b747 100644
--- a/backend/ml_models/AnnualBillSavings.py
+++ b/backend/ml_models/AnnualBillSavings.py
@@ -1,5 +1,6 @@
 import numpy as np
 import pandas as pd
+from backend.apis.GoogleSolarApi import GoogleSolarApi
 
 QUARTERLY_ENERGY_PRICES = [
     # 2024 Q1
@@ -282,4 +283,8 @@ class AnnualBillSavings:
 
             return (kwh / cop) * cost_per_kwh
 
+        if fuel == "Natural Gas + Solar Thermal":
+            # The solar thermal covers a % of the heating kwh, so we need to adjust the cost
+            return (kwh / cop) * GoogleSolarApi.SOLAR_CONSUMPTION_PROPORTION * cls.GAS_PRICE_CAP
+
         raise Exception("Fuel not recognised")