diff --git a/Buildings/Fluid/SolarCollectors/ASHRAE93.mo b/Buildings/Fluid/SolarCollectors/ASHRAE93.mo
index 3ddad27c314..3767686244c 100644
--- a/Buildings/Fluid/SolarCollectors/ASHRAE93.mo
+++ b/Buildings/Fluid/SolarCollectors/ASHRAE93.mo
@@ -26,7 +26,7 @@ model ASHRAE93 "Model of a flat plate solar thermal collector"
     final G_nominal=per.G_nominal,
     dT_nominal=per.dT_nominal,
     final A_c=TotalArea_internal,
-    m_flow_nominal=per.mperA_flow_nominal*per.A,
+    m_flow_nominal=per.mperA_flow_nominal*per.A*nPanels_internal,
     final cp_default=cp_default)
     "Calculates the heat lost to the surroundings using the ASHRAE93 standard calculations"
         annotation (Placement(transformation(extent={{-20,6},{0,26}})));
@@ -176,6 +176,12 @@ equation
  </html>", revisions="<html>
  <ul>
  <li>
+ November 21, 2017, by Michael Wetter:<br/>
+ Corrected error in heat loss calculations that did not scale correctly with <code>nPanels</code>.<br/>
+ This is for
+ <a href=\"https://github.com/lbl-srg/modelica-buildings/issues/1073\">issue 1073</a>.
+ </li>
+ <li>
  October 18, 2013, by Michael Wetter:<br/>
  Removed duplicate connection.
  </li>
diff --git a/Buildings/Fluid/SolarCollectors/BaseClasses/ASHRAEHeatLoss.mo b/Buildings/Fluid/SolarCollectors/BaseClasses/ASHRAEHeatLoss.mo
index 92afc03d89c..0e2ff735a36 100644
--- a/Buildings/Fluid/SolarCollectors/BaseClasses/ASHRAEHeatLoss.mo
+++ b/Buildings/Fluid/SolarCollectors/BaseClasses/ASHRAEHeatLoss.mo
@@ -14,13 +14,13 @@ protected
     "Coefficient describing heat loss to ambient conditions";
 initial equation
    //Identifies useful heat gain at nominal conditions
-   QUse_nominal = G_nominal * A_c * y_intercept + slope * A_c * (dT_nominal);
+   QUse_nominal = G_nominal * A_c * y_intercept + slope * A_c * dT_nominal;
    //Identifies TFlu[nSeg] at nominal conditions
    m_flow_nominal * cp_default * (dT_nominal_fluid[nSeg]) = QUse_nominal;
    //Identifies heat lost to environment at nominal conditions
-   QLos_nominal = -slope * A_c * (dT_nominal);
+   QLos_nominal = -slope * A_c * dT_nominal;
    //Governing equation for the first segment (i=1)
-   G_nominal * y_intercept * A_c/nSeg - UA/nSeg * (dT_nominal) = m_flow_nominal * cp_default
+   G_nominal * y_intercept * A_c/nSeg - UA/nSeg * dT_nominal = m_flow_nominal * cp_default
    * (dT_nominal_fluid[1]);
    //Loop with the governing equations for segments 2:nSeg-1
    for i in 2:nSeg-1 loop
diff --git a/Buildings/Fluid/SolarCollectors/BaseClasses/EN12975HeatLoss.mo b/Buildings/Fluid/SolarCollectors/BaseClasses/EN12975HeatLoss.mo
index c0e677bcc78..2691558e5c8 100644
--- a/Buildings/Fluid/SolarCollectors/BaseClasses/EN12975HeatLoss.mo
+++ b/Buildings/Fluid/SolarCollectors/BaseClasses/EN12975HeatLoss.mo
@@ -12,18 +12,18 @@ block EN12975HeatLoss
 protected
   final parameter Modelica.SIunits.ThermalConductance UA(
      fixed = false,
-     start=QLos_nominal/(dT_nominal))
+     start=QLos_nominal/dT_nominal)
     "Coefficient describing heat loss to ambient conditions";
 initial equation
    //Identifies useful heat gain at nominal conditions
    QUse_nominal = G_nominal * A_c * y_intercept -C1 * A_c *
-      (dT_nominal) - C2 * A_c * (dT_nominal)^2;
+      dT_nominal - C2 * A_c * dT_nominal^2;
    //Identifies TFlu[nSeg] at nominal conditions
    m_flow_nominal * cp_default * (dT_nominal_fluid[nSeg]) = QUse_nominal;
    //Identifies heat lost to environment at nominal conditions
-   QLos_nominal = -C1 * A_c * (dT_nominal)-C2 * A_c * (dT_nominal)^2;
+   QLos_nominal = -C1 * A_c * dT_nominal-C2 * A_c * dT_nominal^2;
    //Governing equation for the first segment (i=1)
-   G_nominal * y_intercept * A_c/nSeg - UA/nSeg * (dT_nominal)
+   G_nominal * y_intercept * A_c/nSeg - UA/nSeg * dT_nominal
      = m_flow_nominal * cp_default * (dT_nominal_fluid[1]);
    //Loop with the governing equations for segments 2:nSeg-1
    for i in 2:nSeg-1 loop
diff --git a/Buildings/Fluid/SolarCollectors/EN12975.mo b/Buildings/Fluid/SolarCollectors/EN12975.mo
index 0af2723f8d7..e605a9ccb2a 100644
--- a/Buildings/Fluid/SolarCollectors/EN12975.mo
+++ b/Buildings/Fluid/SolarCollectors/EN12975.mo
@@ -26,7 +26,7 @@ extends Buildings.Fluid.SolarCollectors.BaseClasses.PartialSolarCollector(final
     redeclare package Medium = Medium,
     final G_nominal=per.G_nominal,
     final dT_nominal=per.dT_nominal,
-    final m_flow_nominal=per.mperA_flow_nominal*per.A,
+    final m_flow_nominal=per.mperA_flow_nominal*per.A*nPanels_internal,
     final cp_default=cp_default)
     "Calculates the heat lost to the surroundings using the EN12975 standard calculations"
            annotation (Placement(transformation(extent={{-20,6},{0,26}})));
@@ -102,7 +102,13 @@ equation
           <a href=\"http://www.energyplus.gov\">EnergyPlus 7.0.0 Engineering Reference</a>, October 13, 2011.<br/>
         </p>
     </html>", revisions="<html>
-      <ul>
+    <ul>
+        <li>
+        November 21, 2017, by Michael Wetter:<br/>
+        Corrected error in heat loss calculations that did not scale correctly with <code>nPanels</code>.<br/>
+        This is for
+        <a href=\"https://github.com/lbl-srg/modelica-buildings/issues/1073\">issue 1073</a>.
+        </li>
         <li>
           January 4, 2013, by Peter Grant:<br/>
           First implementation.
diff --git a/Buildings/Fluid/SolarCollectors/Validation/EN12975NPanels.mo b/Buildings/Fluid/SolarCollectors/Validation/EN12975NPanels.mo
new file mode 100644
index 00000000000..12055def006
--- /dev/null
+++ b/Buildings/Fluid/SolarCollectors/Validation/EN12975NPanels.mo
@@ -0,0 +1,138 @@
+within Buildings.Fluid.SolarCollectors.Validation;
+model EN12975NPanels
+  "Validation model for collector according to EN12975 with different settings for nPanel"
+  extends Modelica.Icons.Example;
+  replaceable package Medium = Buildings.Media.Water "Medium in the system";
+
+  parameter Integer nPanels=10 "Number of panels";
+
+  Buildings.Fluid.SolarCollectors.EN12975 solCol(
+    redeclare package Medium = Medium,
+    per=datSolCol,
+    shaCoe=0,
+    azi=0,
+    energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial,
+    rho=0.2,
+    nColType=Buildings.Fluid.SolarCollectors.Types.NumberSelection.Number,
+    nPanels=1,
+    nSeg=30,
+    lat=0.6457718232379,
+    til=0.78539816339745)
+    "Flat plate solar collector model, has been modified for validation purposes"
+    annotation (Placement(transformation(extent={{20,20},{40,40}})));
+
+  Buildings.BoundaryConditions.WeatherData.ReaderTMY3 weaDat(filNam=
+        "modelica://Buildings/Resources/weatherdata/USA_CA_San.Francisco.Intl.AP.724940_TMY3.mos")
+    "Weather data file reader"
+    annotation (Placement(transformation(extent={{-40,60},{-20,80}})));
+  Buildings.Fluid.Sources.Boundary_pT sou(
+    redeclare package Medium = Medium,
+    use_p_in=false,
+    p(displayUnit="Pa") = 101325,
+    nPorts=1) "Outlet for water flow"
+    annotation (Placement(transformation(extent={{80,20},{60,40}})));
+  Buildings.Fluid.Sources.MassFlowSource_T bou(
+    nPorts=1,
+    redeclare package Medium = Medium,
+    use_m_flow_in=true,
+    use_T_in=false,
+    T=303.15) "Inlet for water flow, at a prescribed flow rate and temperature"
+    annotation (Placement(transformation(extent={{-12,20},{8,40}})));
+
+  Buildings.Fluid.SolarCollectors.EN12975 solCol1(
+    redeclare package Medium = Medium,
+    per=datSolCol,
+    shaCoe=0,
+    azi=0,
+    energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial,
+    rho=0.2,
+    nColType=Buildings.Fluid.SolarCollectors.Types.NumberSelection.Number,
+    nSeg=30,
+    lat=0.6457718232379,
+    til=0.78539816339745,
+    nPanels=nPanels)
+    "Flat plate solar collector model, has been modified for validation purposes"
+    annotation (Placement(transformation(extent={{20,-40},{40,-20}})));
+  Buildings.Fluid.Sources.Boundary_pT sou1(
+    redeclare package Medium = Medium,
+    use_p_in=false,
+    p(displayUnit="Pa") = 101325,
+    nPorts=1) "Outlet for water flow"
+    annotation (Placement(transformation(extent={{80,-40},{60,-20}})));
+  Buildings.Fluid.Sources.MassFlowSource_T bou1(
+    nPorts=1,
+    redeclare package Medium = Medium,
+    use_m_flow_in=true,
+    use_T_in=false,
+    T=303.15) "Inlet for water flow, at a prescribed flow rate and temperature"
+    annotation (Placement(transformation(extent={{-12,-40},{8,-20}})));
+  Modelica.Blocks.Math.Gain gaiNPan(k=nPanels) "Gain for number of panels"
+    annotation (Placement(transformation(extent={{-52,-32},{-32,-12}})));
+  Modelica.Blocks.Sources.RealExpression difHeaGai(y=solCol.heaGai[30].Q_flow
+         - solCol1.heaGai[30].Q_flow/nPanels)
+    "Difference in heat gain at last panel between model with 1 and with 30 panels"
+    annotation (Placement(transformation(extent={{-68,-72},{-48,-52}})));
+  Modelica.Blocks.Sources.RealExpression difHeaLos(y=solCol.QLos[30].Q_flow -
+        solCol1.QLos[30].Q_flow/nPanels)
+    "Difference in heat loss at last panel between model with 1 and with 30 panels"
+    annotation (Placement(transformation(extent={{-68,-92},{-48,-72}})));
+  Modelica.Blocks.Sources.Constant m_flow_nominal(k=datSolCol.A*datSolCol.mperA_flow_nominal)
+    "Nominal flow rate for one panel"
+    annotation (Placement(transformation(extent={{-88,30},{-68,50}})));
+  parameter Data.Concentrating.C_VerificationModel datSolCol
+    annotation (Placement(transformation(extent={{60,60},{80,80}})));
+equation
+  connect(weaDat.weaBus, solCol1.weaBus) annotation (Line(
+      points={{-20,70},{14,70},{14,-20},{20,-20},{20,-20.4}},
+      color={255,204,51},
+      thickness=0.5,
+      smooth=Smooth.None));
+  connect(bou1.ports[1], solCol1.port_a) annotation (Line(
+      points={{8,-30},{20,-30}},
+      color={0,127,255},
+      smooth=Smooth.None));
+  connect(sou1.ports[1], solCol1.port_b) annotation (Line(
+      points={{60,-30},{40,-30}},
+      color={0,127,255},
+      smooth=Smooth.None));
+  connect(gaiNPan.y, bou1.m_flow_in)
+    annotation (Line(points={{-31,-22},{-12,-22}}, color={0,0,127}));
+  connect(solCol.port_a, bou.ports[1])
+    annotation (Line(points={{20,30},{8,30}}, color={0,127,255}));
+  connect(solCol.port_b, sou.ports[1])
+    annotation (Line(points={{40,30},{60,30}}, color={0,127,255}));
+  connect(solCol.weaBus, weaDat.weaBus) annotation (Line(
+      points={{20,39.6},{18,39.6},{18,40},{14,40},{14,70},{-20,70}},
+      color={255,204,51},
+      thickness=0.5));
+  connect(m_flow_nominal.y, bou.m_flow_in) annotation (Line(points={{-67,40},{-22,
+          40},{-22,38},{-12,38}}, color={0,0,127}));
+  connect(gaiNPan.u, m_flow_nominal.y) annotation (Line(points={{-54,-22},{-60,
+          -22},{-60,40},{-67,40}}, color={0,0,127}));
+  annotation (
+    Documentation(info="<html>
+<p>
+This model validates the solar collector model
+<a href=\"modelica://Buildings.Fluid.SolarCollectors.EN12975\">
+Buildings.Fluid.SolarCollectors.EN12975</a>
+for the case
+where the number of panels is <i>1</i> for the instance <code>solCol</code>
+and <i>10</i> for the instance <code>solCol1</code>.
+The instances <code>difHeaGai</code> and <code>difHeaLos</code>
+compare the heat gain and heat loss between the two models.
+The output of these blocks should be zero, except for rounding errors.
+</p>
+</html>", revisions="<html>
+<ul>
+<li>
+November 21, 2017, by Michael Wetter:<br/>
+First implementation to validate
+<a href=\"https://github.com/lbl-srg/modelica-buildings/issues/1073\">#1073</a>.
+</li>
+</ul>
+</html>"),
+    __Dymola_Commands(file=
+          "modelica://Buildings/Resources/Scripts/Dymola/Fluid/SolarCollectors/Validation/EN12975NPanels.mos"
+        "Simulate and plot"),
+    experiment(Tolerance=1e-6, StopTime=86400));
+end EN12975NPanels;
diff --git a/Buildings/Fluid/SolarCollectors/Validation/FlatPlate.mo b/Buildings/Fluid/SolarCollectors/Validation/FlatPlate.mo
index 68b791ed61a..f201c3f995f 100644
--- a/Buildings/Fluid/SolarCollectors/Validation/FlatPlate.mo
+++ b/Buildings/Fluid/SolarCollectors/Validation/FlatPlate.mo
@@ -16,25 +16,25 @@ model FlatPlate "Validation model for FlatPlate"
     lat=0.6457718232379,
     til=0.78539816339745)
     "Flat plate solar collector model, has been modified for validation purposes"
-    annotation (Placement(transformation(extent={{20,-20},{40,0}})));
+    annotation (Placement(transformation(extent={{20,20},{40,40}})));
 
   Buildings.BoundaryConditions.WeatherData.ReaderTMY3 weaDat(filNam=
     "modelica://Buildings/Resources/weatherdata/USA_CA_San.Francisco.Intl.AP.724940_TMY3.mos")
     "Weather data file reader"
-    annotation (Placement(transformation(extent={{-40,20},{-20,40}})));
+    annotation (Placement(transformation(extent={{-40,60},{-20,80}})));
   Buildings.Fluid.Sources.Boundary_pT sou(
     redeclare package Medium = Medium,
     use_p_in=false,
     p(displayUnit="Pa") = 101325,
     nPorts=1) "Outlet for water flow"
-    annotation (Placement(transformation(extent={{80,-20},{60,0}})));
+    annotation (Placement(transformation(extent={{80,20},{60,40}})));
   Buildings.Fluid.Sources.MassFlowSource_T bou(
     nPorts=1,
     redeclare package Medium = Medium,
     use_m_flow_in=true,
     use_T_in=true)
     "Inlet for water flow, at a prescribed flow rate and temperature"
-    annotation (Placement(transformation(extent={{-12,-20},{8,0}})));
+    annotation (Placement(transformation(extent={{-12,20},{8,40}})));
   Modelica.Blocks.Sources.CombiTimeTable datRea(
     tableOnFile=true,
     tableName="TRNSYS",
@@ -43,43 +43,43 @@ model FlatPlate "Validation model for FlatPlate"
        "modelica://Buildings/Fluid/SolarCollectors/Examples/ValidationData/TRNSYSAnnualData.txt"),
     smoothness=Modelica.Blocks.Types.Smoothness.ConstantSegments)
     "Data reader with inlet conditions from TRNSYS"
-    annotation (Placement(transformation(extent={{-90,-12},{-70,8}})));
+    annotation (Placement(transformation(extent={{-90,28},{-70,48}})));
 
   Modelica.Blocks.Math.Add add
     "Converts TRNSYS data from degree Celsius to Kelving"
-    annotation (Placement(transformation(extent={{-50,-40},{-30,-20}})));
+    annotation (Placement(transformation(extent={{-50,0},{-30,20}})));
   Modelica.Blocks.Sources.Constant const(k=273.15)
     "Used to convert TRNSYS data from degree Celsius to Kelving"
-    annotation (Placement(transformation(extent={{-90,-46},{-70,-26}})));
+    annotation (Placement(transformation(extent={{-90,-6},{-70,14}})));
 
 equation
   connect(weaDat.weaBus, solCol.weaBus) annotation (Line(
-      points={{-20,30},{20,30},{20,-0.4}},
+      points={{-20,70},{20,70},{20,39.6}},
       color={255,204,51},
       thickness=0.5,
       smooth=Smooth.None));
   connect(bou.ports[1], solCol.port_a)      annotation (Line(
-      points={{8,-10},{20,-10}},
+      points={{8,30},{20,30}},
       color={0,127,255},
       smooth=Smooth.None));
   connect(const.y, add.u2) annotation (Line(
-      points={{-69,-36},{-52,-36}},
+      points={{-69,4},{-52,4}},
       color={0,0,127},
       smooth=Smooth.None));
   connect(add.y, bou.T_in)      annotation (Line(
-      points={{-29,-30},{-24,-30},{-24,-6},{-14,-6}},
+      points={{-29,10},{-24,10},{-24,34},{-14,34}},
       color={0,0,127},
       smooth=Smooth.None));
   connect(datRea.y[1], add.u1)        annotation (Line(
-      points={{-69,-2},{-60,-2},{-60,-24},{-52,-24}},
+      points={{-69,38},{-60,38},{-60,16},{-52,16}},
       color={0,0,127},
       smooth=Smooth.None));
   connect(datRea.y[4], bou.m_flow_in)             annotation (Line(
-      points={{-69,-2},{-12,-2}},
+      points={{-69,38},{-12,38}},
       color={0,0,127},
       smooth=Smooth.None));
   connect(sou.ports[1], solCol.port_b) annotation (Line(
-      points={{60,-10},{40,-10}},
+      points={{60,30},{40,30}},
       color={0,127,255},
       smooth=Smooth.None));
   annotation (
diff --git a/Buildings/Fluid/SolarCollectors/Validation/FlatPlateNPanels.mo b/Buildings/Fluid/SolarCollectors/Validation/FlatPlateNPanels.mo
new file mode 100644
index 00000000000..1001002bd40
--- /dev/null
+++ b/Buildings/Fluid/SolarCollectors/Validation/FlatPlateNPanels.mo
@@ -0,0 +1,92 @@
+within Buildings.Fluid.SolarCollectors.Validation;
+model FlatPlateNPanels
+  "Validation model for flat plate collector with different settings for nPanel"
+  extends Buildings.Fluid.SolarCollectors.Validation.FlatPlate;
+  parameter Integer nPanels = 10 "Number of panels";
+  Buildings.Fluid.SolarCollectors.ASHRAE93
+   solCol1(
+    redeclare package Medium = Medium,
+    shaCoe=0,
+    azi=0,
+    per=Buildings.Fluid.SolarCollectors.Data.GlazedFlatPlate.FP_TRNSYSValidation(),
+    energyDynamics=Modelica.Fluid.Types.Dynamics.FixedInitial,
+    rho=0.2,
+    nColType=Buildings.Fluid.SolarCollectors.Types.NumberSelection.Number,
+    nSeg=30,
+    lat=0.6457718232379,
+    til=0.78539816339745,
+    nPanels=nPanels)
+    "Flat plate solar collector model, has been modified for validation purposes"
+    annotation (Placement(transformation(extent={{20,-40},{40,-20}})));
+  Buildings.Fluid.Sources.Boundary_pT sou1(
+    redeclare package Medium = Medium,
+    use_p_in=false,
+    p(displayUnit="Pa") = 101325,
+    nPorts=1) "Outlet for water flow"
+    annotation (Placement(transformation(extent={{80,-40},{60,-20}})));
+  Buildings.Fluid.Sources.MassFlowSource_T bou1(
+    nPorts=1,
+    redeclare package Medium = Medium,
+    use_m_flow_in=true,
+    use_T_in=true)
+    "Inlet for water flow, at a prescribed flow rate and temperature"
+    annotation (Placement(transformation(extent={{-12,-40},{8,-20}})));
+  Modelica.Blocks.Math.Gain gaiNPan(k=nPanels) "Gain for number of panels"
+    annotation (Placement(transformation(extent={{-52,-32},{-32,-12}})));
+  Modelica.Blocks.Sources.RealExpression difHeaGai(
+    y=solCol.heaGai[30].Q_flow - solCol1.heaGai[30].Q_flow/nPanels)
+    "Difference in heat gain at last panel between model with 1 and with 30 panels"
+    annotation (Placement(transformation(extent={{-68,-72},{-48,-52}})));
+  Modelica.Blocks.Sources.RealExpression difHeaLos(
+    y=solCol.QLos[30].Q_flow - solCol1.QLos[30].Q_flow/nPanels)
+    "Difference in heat loss at last panel between model with 1 and with 30 panels"
+    annotation (Placement(transformation(extent={{-68,-92},{-48,-72}})));
+equation
+  connect(weaDat.weaBus, solCol1.weaBus) annotation (Line(
+      points={{-20,70},{14,70},{14,-20},{20,-20},{20,-20.4}},
+      color={255,204,51},
+      thickness=0.5,
+      smooth=Smooth.None));
+  connect(bou1.ports[1], solCol1.port_a) annotation (Line(
+      points={{8,-30},{20,-30}},
+      color={0,127,255},
+      smooth=Smooth.None));
+  connect(add.y, bou1.T_in) annotation (Line(
+      points={{-29,10},{-24,10},{-24,-26},{-14,-26}},
+      color={0,0,127},
+      smooth=Smooth.None));
+  connect(sou1.ports[1], solCol1.port_b) annotation (Line(
+      points={{60,-30},{40,-30}},
+      color={0,127,255},
+      smooth=Smooth.None));
+  connect(gaiNPan.y, bou1.m_flow_in)
+    annotation (Line(points={{-31,-22},{-12,-22}}, color={0,0,127}));
+  connect(gaiNPan.u, datRea.y[4]) annotation (Line(points={{-54,-22},{-60,-22},{
+          -60,38},{-69,38}}, color={0,0,127}));
+  annotation (
+    Documentation(info="<html>
+<p>
+This model validates the solar collector model
+<a href=\"modelica://Buildings.Fluid.SolarCollectors.ASHRAE\">
+Buildings.Fluid.SolarCollectors.ASHRAE</a>
+for the case
+where the number of panels is <i>1</i> for the instance <code>solCol</code>
+and <i>10</i> for the instance <code>solCol1</code>.
+The instances <code>difHeaGai</code> and <code>difHeaLos</code>
+compare the heat gain and heat loss between the two models.
+The output of these blocks should be zero, except for rounding errors.
+</p>
+</html>",
+revisions="<html>
+<ul>
+<li>
+November 21, 2017, by Michael Wetter:<br/>
+First implementation to validate
+<a href=\"https://github.com/lbl-srg/modelica-buildings/issues/1073\">#1073</a>.
+</li>
+</ul>
+</html>"),
+  __Dymola_Commands(file="modelica://Buildings/Resources/Scripts/Dymola/Fluid/SolarCollectors/Validation/FlatPlateNPanels.mos"
+    "Simulate and plot"),
+  experiment(Tolerance=1e-6, StopTime=86400));
+end FlatPlateNPanels;
diff --git a/Buildings/Fluid/SolarCollectors/Validation/package.order b/Buildings/Fluid/SolarCollectors/Validation/package.order
index 58f8a91afc5..6487f5215f2 100644
--- a/Buildings/Fluid/SolarCollectors/Validation/package.order
+++ b/Buildings/Fluid/SolarCollectors/Validation/package.order
@@ -1,2 +1,4 @@
+EN12975NPanels
 ExtremeAmbientConditions
 FlatPlate
+FlatPlateNPanels
diff --git a/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Examples_Concentrating.txt b/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Examples_Concentrating.txt
index b847f0bf4bf..65d5d9c6806 100644
--- a/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Examples_Concentrating.txt
+++ b/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Examples_Concentrating.txt
@@ -1,4 +1,4 @@
-last-generated=2017-05-31
+last-generated=2017-11-21
 statistics-initialization=
 {
   "numerical Jacobians": "0", 
@@ -11,8 +11,8 @@ statistics-simulation=
   "number of continuous time states": "11", 
   "linear": " "
 }
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 time=[0e+00, 8.64e+04]
 solCol.m_flow=[0e+00, -6.346957385540009e-02, -8.896103501319885e-02, -1.07328400015831e-01, -1.213120967149734e-01, -1.318807005882263e-01, -1.394714266061783e-01, -1.443015187978745e-01, -1.464783847332001e-01, -1.460438817739487e-01, -1.429899781942368e-01, -1.372557431459427e-01, -1.287041306495667e-01, -1.170621886849403e-01, -1.017688736319542e-01, -8.150675892829895e-02, -5.190815031528473e-02, 3.674087300896655e-02, 7.311921566724777e-02, 9.567417204380035e-02, 1.12411767244339e-01, 1.251863241195679e-01, 1.347280442714691e-01, 1.413812190294266e-01, 1.453187614679337e-01, 1.466231197118759e-01, 1.453187614679337e-01, 1.413812190294266e-01, 1.347280442714691e-01, 1.251863241195679e-01, 1.12411767244339e-01, 9.567417204380035e-02, 7.311921566724777e-02, 3.674087300896645e-02, -5.190815031528488e-02, -8.150675892829885e-02, -1.017688736319542e-01, -1.170621886849403e-01, -1.287041306495667e-01, -1.372557431459427e-01, -1.429899781942368e-01, -1.460438817739487e-01, -1.464783847332001e-01, -1.443015187978745e-01, -1.394714266061783e-01, -1.318807005882263e-01, -1.213120967149734e-01, -1.07328400015831e-01, -8.896103501319885e-02, -6.346957385540009e-02, 0e+00, 6.346957385540009e-02, 8.896103501319885e-02, 1.07328400015831e-01, 1.213120967149734e-01, 1.318807005882264e-01, 1.394714266061783e-01, 1.443015187978744e-01, 1.464783847332001e-01, 1.460438817739487e-01, 1.429899781942368e-01, 1.372557431459427e-01, 1.287041306495667e-01, 1.170621886849403e-01, 1.017688736319542e-01, 8.150675892829895e-02, 5.190815031528473e-02, -3.674087300896645e-02, -7.311921566724799e-02, -9.567417204380019e-02, -1.124117672443389e-01, -1.251863241195679e-01, -1.347280442714691e-01, -1.413812190294266e-01, -1.453187614679337e-01, -1.466231197118759e-01, -1.453187614679337e-01, -1.413812190294266e-01, -1.347280442714691e-01, -1.251863241195679e-01, -1.12411767244339e-01, -9.567417204380035e-02, -7.311921566724777e-02, -3.674087300896645e-02, 5.190815031528473e-02, 8.150675892829895e-02, 1.017688736319542e-01, 1.170621886849403e-01, 1.287041306495667e-01, 1.372557431459427e-01, 1.429899781942368e-01, 1.460438817739487e-01, 1.464783847332001e-01, 1.443015187978745e-01, 1.394714266061783e-01, 1.318807005882263e-01, 1.213120967149734e-01, 1.07328400015831e-01, 8.896103501319885e-02, 6.346957385540009e-02, 0e+00]
diff --git a/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Examples_FlatPlateShaCoeTrue.txt b/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Examples_FlatPlateShaCoeTrue.txt
index 5d906b35bff..d9cf40bbcdd 100644
--- a/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Examples_FlatPlateShaCoeTrue.txt
+++ b/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Examples_FlatPlateShaCoeTrue.txt
@@ -1,4 +1,4 @@
-last-generated=2017-05-31
+last-generated=2017-11-21
 statistics-initialization=
 {
   "numerical Jacobians": "0", 
@@ -11,8 +11,8 @@ statistics-simulation=
   "number of continuous time states": "11", 
   "linear": " "
 }
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 time=[0e+00, 8.64e+04]
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diff --git a/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Examples_FlatPlateTotalArea.txt b/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Examples_FlatPlateTotalArea.txt
index a30ee8f36c4..f3f5401e5e7 100644
--- a/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Examples_FlatPlateTotalArea.txt
+++ b/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Examples_FlatPlateTotalArea.txt
@@ -1,4 +1,4 @@
-last-generated=2017-05-31
+last-generated=2017-11-21
 statistics-initialization=
 {
   "numerical Jacobians": "0", 
@@ -11,13 +11,13 @@ statistics-simulation=
   "number of continuous time states": "40", 
   "linear": " "
 }
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+solCol1.vol[27].T=[2.931499938964844e+02, 2.90953125e+02, 2.872694396972656e+02, 2.825200805664062e+02, 2.821822814941406e+02, 2.821799011230469e+02, 2.821798706054688e+02, 2.821798706054688e+02, 2.821798706054688e+02, 2.821788940429688e+02, 2.821670532226562e+02, 2.821356506347656e+02, 2.820882568359375e+02, 2.820367431640625e+02, 2.819880981445312e+02, 2.819404602050781e+02, 2.81890869140625e+02, 2.818384094238281e+02, 2.817660522460938e+02, 2.816473693847656e+02, 2.8148974609375e+02, 2.813332214355469e+02, 2.81218994140625e+02, 2.81159423828125e+02, 2.811459655761719e+02, 2.811660766601562e+02, 2.812168273925781e+02, 2.813185424804688e+02, 2.814699096679688e+02, 2.816331787109375e+02, 2.817496337890625e+02, 2.818133544921875e+02, 2.820331115722656e+02, 2.827918701171875e+02, 2.845306091308594e+02, 2.874229125976562e+02, 2.911640319824219e+02, 2.951130065917969e+02, 2.99086181640625e+02, 3.030871887207031e+02, 3.071459045410156e+02, 3.112254638671875e+02, 3.150117492675781e+02, 3.183323059082031e+02, 3.21140380859375e+02, 3.233050537109375e+02, 3.243683776855469e+02, 3.249110412597656e+02, 3.253555603027344e+02, 3.258707580566406e+02, 3.264087524414062e+02, 3.26895751953125e+02, 3.272950439453125e+02, 3.276082458496094e+02, 3.278365173339844e+02, 3.279682006835938e+02, 3.279784240722656e+02, 3.278741455078125e+02, 3.278730773925781e+02, 3.280391235351562e+02, 3.281123962402344e+02, 3.276488037109375e+02, 3.261307678222656e+02, 3.232959899902344e+02, 3.190559387207031e+02, 3.142924194335938e+02, 3.08539306640625e+02, 3.007816467285156e+02, 2.926824340820312e+02, 2.869212951660157e+02, 2.843987426757812e+02, 2.837102355957031e+02, 2.835588073730469e+02, 2.835254211425781e+02, 2.835317687988281e+02, 2.835391845703125e+02, 2.835263671875e+02, 2.834931030273438e+02, 2.834502868652344e+02, 2.834069213867188e+02, 2.833701782226562e+02, 2.833514404296875e+02, 2.833526916503906e+02, 2.83361328125e+02, 2.8335546875e+02, 2.8329443359375e+02, 2.83161376953125e+02, 2.829906921386719e+02, 2.828462524414062e+02, 2.827880859375e+02, 2.828243408203125e+02, 2.829026184082031e+02, 2.829434509277344e+02, 2.828975524902344e+02, 2.827860107421875e+02, 2.826484375e+02, 2.825093078613281e+02, 2.823826904296875e+02, 2.822716064453125e+02, 2.821740417480469e+02, 2.820886840820312e+02]
 solCol1.m_flow=[3.885820135474205e-02, 3.885820135474205e-02]
 solCol.m_flow_nominal=[3.885820135474205e-02, 3.885820135474205e-02]
 solCol.m_flow=[3.885820135474205e-02, 3.885820135474205e-02]
diff --git a/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Examples_FlatPlateWithTank.txt b/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Examples_FlatPlateWithTank.txt
index 22d7d89c648..5e9d3b4a3e6 100644
--- a/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Examples_FlatPlateWithTank.txt
+++ b/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Examples_FlatPlateWithTank.txt
@@ -1,4 +1,4 @@
-last-generated=2017-05-31
+last-generated=2017-11-21
 statistics-initialization=
 {
   "numerical Jacobians": "0", 
@@ -11,8 +11,8 @@ statistics-simulation=
   "number of continuous time states": "27", 
   "linear": " "
 }
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 time=[0e+00, 8.64e+04]
 pumCon.y=[0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 1e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00, 0e+00]
diff --git a/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Examples_Tubular.txt b/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Examples_Tubular.txt
index f8a2d90729b..924283737d8 100644
--- a/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Examples_Tubular.txt
+++ b/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Examples_Tubular.txt
@@ -1,4 +1,4 @@
-last-generated=2017-05-31
+last-generated=2017-11-21
 statistics-initialization=
 {
   "numerical Jacobians": "0", 
@@ -11,8 +11,8 @@ statistics-simulation=
   "number of continuous time states": "11", 
   "linear": " "
 }
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diff --git a/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Validation_EN12975NPanels.txt b/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Validation_EN12975NPanels.txt
new file mode 100644
index 00000000000..74a7724ea34
--- /dev/null
+++ b/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Validation_EN12975NPanels.txt
@@ -0,0 +1,22 @@
+last-generated=2017-11-21
+statistics-initialization=
+{
+  "numerical Jacobians": "0", 
+  "nonlinear": "1, 1"
+}
+statistics-simulation=
+{
+  "numerical Jacobians": "0", 
+  "nonlinear": "1", 
+  "number of continuous time states": "60", 
+  "linear": " "
+}
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diff --git a/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Validation_FlatPlateNPanels.txt b/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Validation_FlatPlateNPanels.txt
new file mode 100644
index 00000000000..540700dcff8
--- /dev/null
+++ b/Buildings/Resources/ReferenceResults/Dymola/Buildings_Fluid_SolarCollectors_Validation_FlatPlateNPanels.txt
@@ -0,0 +1,22 @@
+last-generated=2017-11-21
+statistics-initialization=
+{
+  "numerical Jacobians": "0", 
+  "nonlinear": "1, 1"
+}
+statistics-simulation=
+{
+  "numerical Jacobians": "0", 
+  "nonlinear": "1", 
+  "number of continuous time states": "60", 
+  "linear": " "
+}
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+difHeaGai.y=[-1.033975765691285e-25, -1.033975765691285e-25, -1.033975765691285e-25, 0e+00, -2.067951531382569e-25, -2.067951531382569e-25, -1.033975765691285e-25, -1.03397576569129e-25, -1.033975765691285e-25, -1.033975765691285e-25, -1.033975765691285e-25, -2.067951531382569e-25, -2.067951531382569e-25, -1.033975765691285e-25, -2.067951531382569e-25, -1.033975765691285e-25, -1.033975765691285e-25, -1.033975765691285e-25, -1.033975765691285e-25, -2.067951531382569e-25, -3.101927297073854e-25, -1.033975765691285e-25, -2.067951531382569e-25, -2.067951531382569e-25, 0e+00, -2.067951531382569e-25, -2.067951531382569e-25, -1.033975765691285e-25, -2.168404344971228e-19, -2.775557561562891e-17, -2.220446049250313e-16, -2.220446049250313e-16, -8.881784197001252e-16, -1.77635683940025e-15, -3.552713678800501e-15, -7.105427357600927e-15, -7.105427357601002e-15, -1.4210854715202e-14, -7.105427357601002e-15, 0e+00, -1.4210854715202e-14, -1.4210854715202e-14, 0e+00, -2.842170943040401e-14, -2.842170943040401e-14, -2.842170943040401e-14, -1.4210854715202e-14, -1.4210854715202e-14, -1.4210854715202e-14, -1.4210854715202e-14, -1.4210854715202e-14, 0e+00, -1.4210854715202e-14, -2.842170943040401e-14, -1.4210854715202e-14, -2.842170943040281e-14, -1.4210854715202e-14, -5.99534287967969e-28, -1.4210854715202e-14, -2.842170943040401e-14, -1.4210854715202e-14, -1.4210854715202e-14, -1.4210854715202e-14, -7.105427357601002e-15, -7.105427357601002e-15, -1.4210854715202e-14, -7.105427357601002e-15, -1.77635683940025e-15, -4.440892098500532e-16, -2.067951531382569e-25, 0e+00, -2.067951531382569e-25, -2.067951531382569e-25, -2.067951531382569e-25, 0e+00, -1.033975765691285e-25, -1.033975765691285e-25, 0e+00, -2.067951531382569e-25, -1.033975765691285e-25, -1.033975765691285e-25, -2.067951531382569e-25, -2.067951531382569e-25, -1.033975765691285e-25, -1.033975765691285e-25, -1.033975765691285e-25, -1.033975765691285e-25, -1.033975765691285e-25, -2.067951531382569e-25, -1.033975765691285e-25, -1.033975765691285e-25, -1.033975765691285e-25, -1.033975765691285e-25, -2.067951531382569e-25, -1.033975765691285e-25, -1.033975765691285e-25, -2.067951531382569e-25, -1.033975765691285e-25, -1.033975765691285e-25, -2.067951531382569e-25, -1.033975765691285e-25]
+difHeaLos.y=[1.77635683940025e-15, 8.881784197001252e-16, 8.193445921733655e-14, 5.551115123125783e-17, -2.037259250187162e-14, 2.602085213965211e-18, 4.336808689942018e-19, 1.084202172485502e-19, 2.032879073410321e-20, 1.734723475976807e-18, 6.938893903907228e-18, 1.387778780781446e-17, 6.938893903907228e-18, 1.040834085586084e-17, 2.040034807748704e-14, 1.387778780781446e-17, 1.387778780781446e-17, 1.387778780781446e-17, 2.775557561562891e-17, 4.163336342344337e-17, -2.035871471406381e-14, 6.118716644465394e-14, 1.387778780781446e-17, 1.734723475976807e-18, 2.038473556620346e-14, -6.938893903907228e-18, -2.775557561562891e-17, -4.163336342344337e-17, -4.16333634234429e-17, -1.040834085586084e-17, 1.110223024625157e-16, 4.440892098500626e-16, 8.881784197001252e-16, 2.664535259100376e-15, -3.552713678800464e-14, 8.88178419700144e-16, 8.881784197001252e-16, 1.77635683940025e-15, 1.77635683940025e-15, 1.77635683940025e-15, -1.865174681370263e-14, 2.664535259100376e-15, 2.664535259100376e-15, 1.77635683940025e-15, 1.77635683940025e-15, 1.77635683940025e-15, 1.77635683940025e-15, 1.77635683940025e-15, 1.77635683940025e-15, 1.77635683940025e-15, 1.77635683940025e-15, 1.77635683940025e-15, 1.77635683940025e-15, 2.664535259100376e-15, 1.77635683940025e-15, 1.77635683940025e-15, 1.77635683940025e-15, -1.865174681370181e-14, 1.77635683940025e-15, 1.77635683940025e-15, 2.220446049250313e-14, -1.865174681370263e-14, 8.881784197001252e-16, 1.332267629550188e-15, 8.881784197001252e-16, 8.881784197001252e-16, 6.661338147750939e-16, 2.065014825802791e-14, 2.087219286295208e-14, -2.009503674571619e-14, -2.026157019940911e-14, 2.775557561562891e-17, -2.038300084272748e-14, -6.117155393337015e-14, -2.602085213965211e-18, -2.038820501315541e-14, 3.469446951953614e-18, 6.938893903907228e-18, 1.040834085586084e-17, 6.938893903907228e-18, 5.204170427930421e-18, -2.039080709836938e-14, -2.039254182184536e-14, -2.039021078717451e-14, 1.387778780781446e-17, 2.775557561562891e-17, 4.163336342344337e-17, 2.775557561562891e-17, 1.387778780781446e-17, -1.040834085586084e-17, -2.081668171172169e-17, -1.387778780781446e-17, 1.387778780781446e-17, 1.387778780781446e-17, 2.775557561562891e-17, 4.163336342344337e-17, -8.153200337090993e-14, 2.041422586529507e-14, 1.387778780781446e-17, 1.387778780781446e-17, 1.387778780781446e-17]
diff --git a/Buildings/Resources/Scripts/Dymola/Fluid/SolarCollectors/Validation/EN12975NPanels.mos b/Buildings/Resources/Scripts/Dymola/Fluid/SolarCollectors/Validation/EN12975NPanels.mos
new file mode 100644
index 00000000000..1f9a481d586
--- /dev/null
+++ b/Buildings/Resources/Scripts/Dymola/Fluid/SolarCollectors/Validation/EN12975NPanels.mos
@@ -0,0 +1,5 @@
+simulateModel("Buildings.Fluid.SolarCollectors.Validation.EN12975NPanels", tolerance=1e-6, stopTime=86400, method="dassl", resultFile="EN12975NPanels");
+createPlot(id=1, position={210, 54, 1727, 864}, y={"solCol.vol[30].T", "solCol1.vol[30].T"}, range={0.0, 90000.0, 0.0, 100.0}, grid=true, colors={{0,0,255}, {255,0,0}});
+createPlot(id=1, position={210, 54, 1727, 213}, y={"solCol.heaGai[30].Q_flow", "solCol1.heaGai[30].Q_flow"}, range={0.0, 90000.0, -1000.0, 1000.0}, grid=true, subPlot=2, colors={{28,108,200}, {238,46,47}});
+createPlot(id=1, position={210, 54, 1727, 212}, y={"solCol.heaLos.QLos[30]", "solCol1.heaLos.QLos[30]"}, range={0.0, 90000.0, -200.0, 200.0}, grid=true, subPlot=3, colors={{28,108,200}, {238,46,47}});
+createPlot(id=1, position={210, 54, 1727, 212}, y={"difHeaGai.y", "difHeaLos.y"}, range={0.0, 90000.0, -2.0000000000000003E-13, 2.0000000000000003E-13}, grid=true, subPlot=4, colors={{28,108,200}, {238,46,47}});
diff --git a/Buildings/Resources/Scripts/Dymola/Fluid/SolarCollectors/Validation/FlatPlateNPanels.mos b/Buildings/Resources/Scripts/Dymola/Fluid/SolarCollectors/Validation/FlatPlateNPanels.mos
new file mode 100644
index 00000000000..6262187e98d
--- /dev/null
+++ b/Buildings/Resources/Scripts/Dymola/Fluid/SolarCollectors/Validation/FlatPlateNPanels.mos
@@ -0,0 +1,5 @@
+simulateModel("Buildings.Fluid.SolarCollectors.Validation.FlatPlateNPanels", tolerance=1e-6, stopTime=86400, method="dassl", resultFile="ValidationFlatPlateNPanels");
+createPlot(id=1, position={210, 54, 1727, 864}, y={"solCol.vol[30].T", "solCol1.vol[30].T"}, range={0.0, 90000.0, 0.0, 100.0}, grid=true, colors={{0,0,255}, {255,0,0}});
+createPlot(id=1, position={210, 54, 1727, 213}, y={"solCol.heaGai[30].Q_flow", "solCol1.heaGai[30].Q_flow"}, range={0.0, 90000.0, -1000.0, 1000.0}, grid=true, subPlot=2, colors={{28,108,200}, {238,46,47}});
+createPlot(id=1, position={210, 54, 1727, 212}, y={"solCol.heaLos.QLos[30]", "solCol1.heaLos.QLos[30]"}, range={0.0, 90000.0, -200.0, 200.0}, grid=true, subPlot=3, colors={{28,108,200}, {238,46,47}});
+createPlot(id=1, position={210, 54, 1727, 212}, y={"difHeaGai.y", "difHeaLos.y"}, range={0.0, 90000.0, -2.0000000000000003E-13, 2.0000000000000003E-13}, grid=true, subPlot=4, colors={{28,108,200}, {238,46,47}});
diff --git a/Buildings/Resources/Scripts/OpenModelica/compareVars/Buildings.Fluid.SolarCollectors.Validation.EN12975NPanels.mos b/Buildings/Resources/Scripts/OpenModelica/compareVars/Buildings.Fluid.SolarCollectors.Validation.EN12975NPanels.mos
new file mode 100644
index 00000000000..11c9c8ae1be
--- /dev/null
+++ b/Buildings/Resources/Scripts/OpenModelica/compareVars/Buildings.Fluid.SolarCollectors.Validation.EN12975NPanels.mos
@@ -0,0 +1,11 @@
+compareVars :=
+  {
+    "solCol.vol[30].T",
+    "solCol1.vol[30].T",
+    "solCol.heaGai[30].Q_flow",
+    "solCol1.heaGai[30].Q_flow",
+    "solCol.heaLos.QLos[30]",
+    "solCol1.heaLos.QLos[30]",
+    "difHeaGai.y",
+    "difHeaLos.y"
+  };
diff --git a/Buildings/Resources/Scripts/OpenModelica/compareVars/Buildings.Fluid.SolarCollectors.Validation.FlatPlateNPanels.mos b/Buildings/Resources/Scripts/OpenModelica/compareVars/Buildings.Fluid.SolarCollectors.Validation.FlatPlateNPanels.mos
new file mode 100644
index 00000000000..11c9c8ae1be
--- /dev/null
+++ b/Buildings/Resources/Scripts/OpenModelica/compareVars/Buildings.Fluid.SolarCollectors.Validation.FlatPlateNPanels.mos
@@ -0,0 +1,11 @@
+compareVars :=
+  {
+    "solCol.vol[30].T",
+    "solCol1.vol[30].T",
+    "solCol.heaGai[30].Q_flow",
+    "solCol1.heaGai[30].Q_flow",
+    "solCol.heaLos.QLos[30]",
+    "solCol1.heaLos.QLos[30]",
+    "difHeaGai.y",
+    "difHeaLos.y"
+  };
diff --git a/Buildings/package.mo b/Buildings/package.mo
index 3507659217c..9b9c422f6f2 100644
--- a/Buildings/package.mo
+++ b/Buildings/package.mo
@@ -207,12 +207,15 @@ its class name ends with the string <code>Beta</code>.
    that can lead to wrong simulation results):
    </p>
    <table class=\"releaseTable\" summary=\"summary\" border=\"1\" cellspacing=0 cellpadding=2 style=\"border-collapse:collapse;\">
-   <tr><td colspan=\"2\"><b>xxx</b>
+   <tr><td colspan=\"2\"><b>Buildings.Fluid.SolarCollectors</b>
        </td>
    </tr>
-   <tr><td valign=\"top\">xxx
+   <tr><td valign=\"top\">Buildings.Fluid.SolarCollectors.ASHRAE93<br/>
+                          Buildings.Fluid.SolarCollectors.EN12975
        </td>
-       <td valign=\"top\">xxx.
+       <td valign=\"top\">Corrected error in parameterization of heat loss calculation
+                          that led to too small heat losses if the number of panels is different from one.<br/>
+                          This is for <a href=\"https://github.com/lbl-srg/modelica-buildings/issues/1073\">issue 1073</a>.
        </td>
    </tr>
    </table>

xxx +
Buildings.Fluid.SolarCollectors
xxx +
Buildings.Fluid.SolarCollectors.ASHRAE93 + Buildings.Fluid.SolarCollectors.EN12975	xxx. +	Corrected error in parameterization of heat loss calculation + that led to too small heat losses if the number of panels is different from one. + This is for issue 1073.