Custom Controls for Improved Demand Response from Heat Pump Water Heaters

Research output: NRELPresentation


As part of a Grid Modernization Laboratory Consortium (GMLC) project looking at defining grid services for a range of devices, NREL used a custom controller to investigate the ability of a HPWH to provide load add and load shed in hybrid and electric resistance mode using standard set point control. Based on those results, changes were made to the controls to increase the amount of grid services delivered, especially in the load-add case, and speed up the recovery from those events. The custom controls also include less common methods, such as duty cycling of the heat pump or elements. The improved controls led to an increase the amount of demand response that could be provided and enabled faster recovery. Results from the laboratory experiments will be presented, along with details about the custom controls that were implemented.
Original languageAmerican English
Number of pages18
StatePublished - 2020

Publication series

NamePresented at the ACEEE Hot Water Forum, 21-29 July 2020

Bibliographical note

See NREL/TP-5500-75323 for related technical report

NREL Publication Number

  • NREL/PR-5500-77348


  • demand response
  • electric water heater
  • heat pump water heater
  • home energy management
  • HPWH
  • smart home


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