Device Energy Efficiency Policies (such as Appliances, Vehicles)

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Note:  See Process and Device Energy for descriptions of these model concepts. See also a graphic of model variables impacting device energy efficiency calculations .


Appliance or vehicle (device energy) efficiency policies set a floor for the consumer selected level of efficiency. Efficiencies from the model are able to exceed this limit if the endogenously calculated value is higher than the standard.


The following policy variables are typically used to impact device energy efficiency include the following:

  • Device efficiency maximum multiplier (DEMM)
  • Device efficiency standard (DEStdP)

Additional variables may be assigned values to reflect the costs of obtaining the improved energy efficiency. Note that applying a standard without adjusting other curve parameters will generally result in an increase in endogenous investment levels from the model:

  • Cost of the program (DInvTechExo)


The following policy variables are also included in policy files (needs explanation):

    • DCCLimit
    • DERReduction
    • DERRRExo
    • DInvTechExo
    • DCTC
    • DFTC