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Fernanda Schuch of DesignBuilder support provided a solution through EMS scripting. The EMS included (3) sensors: meter Electricity:Facility, meter ResidentialMeter (previously created using meter:custom object), and meter ElectricityProduced:Facility (which I changed to output variable, *,Inverter AC Output Electricity Energy, for capturing post inverter energy at the net meter. Then a simple program was written to set the CommercialElectric (global variable) = Electricity:Facility - ResidentialMeter - Inverter AC Output Electricity Energy.

here is a copy of the code for reference: EnergyManagementSystem:Sensor, FacilityElectric, , Electricity:Facility;

EnergyManagementSystem:Sensor, ResidentialElectric, , 130Bank_ResidentialElecMeter;

EnergyManagementSystem:Sensor, SolarGenerated, EXAMPLE INVERTER - SIMPLE, Inverter AC Output Electricity Energy;

EnergyManagementSystem:GlobalVariable, CommercialElectric;

EnergyManagementSystem:Program, CalculateCommercialNet, Set CommercialElectric = FacilityElectric - ResidentialElectric - SolarGenerated;

EnergyManagementSystem:ProgramCallingManager, RunCalcCommercial, EndOfZoneTimestepBeforeZoneReporting, CalculateCommercialNet;

EnergyManagementSystem:OutputVariable, CommercialElectric, CommercialElectric, Summed, ZoneTimeStep, , Joules;

Output:Variable,,CommercialElectric,Hourly; Output:Variable,,CommercialElectric,Daily; Output:Variable,,CommercialElectric,Monthly; Output:Variable,,CommercialElectric,RunPeriod;

Meter:Custom, CommercialElecMeter, Electricity, , CommercialElectric;

Fernanda Schuch of DesignBuilder support provided a solution through EMS scripting. The EMS included (3) sensors: sensors:

• meter Electricity:Facility, Electricity:Facility
• meter ResidentialMeter (previously created using meter:custom object), and object)
• meter ElectricityProduced:Facility (which I changed to output variable, *,Inverter AC Output Electricity Energy, for capturing post inverter energy at the net meter. meter)

Then a simple program was written to set the

CommercialElectric (global variable) = Electricity:Facility - ResidentialMeter - Inverter AC Output Electricity Energy.

here

Here is a copy of the code for reference: reference:

EnergyManagementSystem:Sensor,
   FacilityElectric,
    ,
    Electricity:Facility;
 
,
  Electricity:Facility;

EnergyManagementSystem:Sensor,
   ResidentialElectric,
    ,
    130Bank_ResidentialElecMeter;
 
,
  130Bank_ResidentialElecMeter;

EnergyManagementSystem:Sensor,
   SolarGenerated,
   EXAMPLE INVERTER - SIMPLE,
   Inverter AC Output Electricity Energy;
 
Energy;

EnergyManagementSystem:GlobalVariable,
    CommercialElectric;
 
CommercialElectric;

EnergyManagementSystem:Program,
   CalculateCommercialNet,
   Set CommercialElectric = FacilityElectric - ResidentialElectric - SolarGenerated;
 
SolarGenerated;

EnergyManagementSystem:ProgramCallingManager,
   RunCalcCommercial,
   EndOfZoneTimestepBeforeZoneReporting,
    CalculateCommercialNet;
 
CalculateCommercialNet;

EnergyManagementSystem:OutputVariable,
   CommercialElectric,
   CommercialElectric,
   Summed,
   ZoneTimeStep,
    ,
    Joules;
 
Output:Variable,,CommercialElectric,Hourly;
Output:Variable,,CommercialElectric,Daily;
Output:Variable,,CommercialElectric,Monthly;
Output:Variable,,CommercialElectric,RunPeriod;
 
,
  Joules;

Output:Variable,*,CommercialElectric,Hourly;
Output:Variable,*,CommercialElectric,Daily;
Output:Variable,*,CommercialElectric,Monthly;
Output:Variable,*,CommercialElectric,RunPeriod;

Meter:Custom,
 CommercialElecMeter,
 Electricity,
    ,
    CommercialElectric;
 ,
CommercialElectric;

Thanks