diff --git a/IBPSA/Electrical/PVSystem/PVSystemSingleDiode.mo b/IBPSA/Electrical/PVSystem/PVSystemSingleDiode.mo
index 496d3e0fab..6f4871a30d 100644
--- a/IBPSA/Electrical/PVSystem/PVSystemSingleDiode.mo
+++ b/IBPSA/Electrical/PVSystem/PVSystemSingleDiode.mo
@@ -1,6 +1,53 @@
 within IBPSA.Electrical.PVSystem;
 model PVSystemSingleDiode "Photovoltaic module model based on single diode approach"
-  extends IBPSA.Electrical.BaseClasses.PVSystem.PartialPVSystem;
+  extends IBPSA.Electrical.BaseClasses.PVSystem.PartialPVSystem(
+    final ageing=ageing,
+  redeclare IBPSA.Electrical.BaseClasses.PVSystem.PVOpticalHorFixedAziTil partialPVOptical(
+      final lat=lat,
+      final lon=lon,
+      final alt=alt,
+      final til=til,
+      final azi=azi,
+      final timZon=timZon,
+      final groRef=groRef,
+      final radTil0=radTil0,
+      final glaExtCoe=glaExtCoe,
+      final glaThi=glaThi,
+      final refInd=refInd,
+      final tau_0=tau_0),
+  final use_MPP_in=false,
+  final use_Til_in=false,
+  final til=til,
+  final use_Azi_in=false,
+  final azi=azi,
+  final use_Sha_in=false,
+  final use_age_in=false,
+  final use_heat_port=false);
+
+  parameter Modelica.Units.SI.Angle til "Fixed tilt angle of the PV module" annotation(Dialog(tab="Module mounting and specifications"));
+  parameter Modelica.Units.SI.Angle azi "Fixed azimuth angle of the PV module" annotation(Dialog(tab="Module mounting and specifications"));
+
+
+  parameter Real groRef "Ground refelctance" annotation(Dialog(tab="Module mounting and specifications"));
+  parameter Real glaExtCoe=4 "Glazing extinction coefficient for glass" annotation(Dialog(tab="Module mounting and specifications"));
+  parameter Real glaThi=0.002
+    "Glazing thickness for most PV cell panels it is 0.002 m" annotation(Dialog(tab="Module mounting and specifications"));
+  parameter Real refInd=1.526
+    "Effective index of refraction of the cell cover (glass)" annotation(Dialog(tab="Module mounting and specifications"));
+  parameter Real lat "Latitude" annotation(Dialog(tab="Site specifications"));
+  parameter Real lon "Longitude" annotation(Dialog(tab="Site specifications"));
+  parameter Real alt "Site altitude in Meters, default= 1" annotation(Dialog(tab="Site specifications"));
+  parameter Real timZon "Time zone in seconds relative to GMT" annotation(Dialog(tab="Site specifications"));
+  parameter Real radTil0=1000 "Total solar radiation on the horizontal surface 
+  under standard conditions" annotation(Dialog(tab="Site specifications"));
+
+protected
+  parameter Real tau_0=exp(-(partialPVOptical.glaExtCoe*partialPVOptical.glaThi))
+      *(1 - ((partialPVOptical.refInd - 1)/(partialPVOptical.refInd + 1))^2)
+    "Transmittance at standard conditions (incAng=refAng=0)";
+equation
+  connect(HGloHor, partialPVOptical.HGloHor) annotation (Line(points={{-99,91},{
+          -42,91},{-42,70},{-36.36,70}}, color={0,0,127}));
   annotation (Icon(coordinateSystem(preserveAspectRatio=false)), Diagram(
         coordinateSystem(preserveAspectRatio=false)));
 end PVSystemSingleDiode;