You can use the Meter:Custom object in EnergyPlus to create a meter for all PTHP units.

Meter:Custom,
  PTHPEnergy,
  Electricity,
  Zone1_PTHP,
  Zone Packaged Package Terminal Heat Pump Electric Energy,
  Zone2_PTHP,
  Zone Packaged Package Terminal Heat Pump Electric Energy;

I've created an OpenStudio measure where you can define a Meter:Custom object in a .csv file and it will add it for you, described in the answer to this Unmet hours question. For your application, the .csv would look something like this:

key_name,output_variable_or_meter_name
Zone1_PTHP,Zone Packaged Package Terminal Heat Pump Electric Energy
Zone2_PTHP,Zone Packaged Package Terminal Heat Pump Electric Energy

You can use the Meter:Custom object in EnergyPlus to create a meter for all PTHP units.

Meter:Custom,
  PTHPEnergy,
  Electricity,
  Zone1_PTHP,Zone1,
  Zone Package Terminal Heat Pump Electric Energy,
  Zone2_PTHP,Zone2,
  Zone Package Terminal Heat Pump Electric Energy;

I've created an OpenStudio measure where you can define a Meter:Custom object in a .csv file and it will add it for you, described in the answer to this Unmet hours question. For your application, the .csv would look something like this:

key_name,output_variable_or_meter_name
Zone1_PTHP,Zone Zone1,Zone Package Terminal Heat Pump Electric Energy
Zone2_PTHP,Zone Zone2,Zone Package Terminal Heat Pump Electric Energy