Revisions to the SRCC Rating Process for Solar Water Heaters: Preprint

Research output: Contribution to conferencePaper


In the United States, annual performance ratings for solar water heaters are computed with component-based simulation models driven by typical meteorological year weather and specified water draw. Changes in the process are being implemented to enhance credibility through increased transparency and accuracy. Changes to the process include using a graphical rather than text-based model-buildingtool, performing analytical tests on all components and systems, checking energy balances on every component, loop, and system at every time step, comparing the results to detect outliers and potential errors, and documenting the modeling process in detail. Examples of changes in ratings are shown, along with analytical and comparative testing results.
Original languageAmerican English
Number of pages10
StatePublished - 2012
Event2012 World Renewable Energy Forum - Denver, Colorado
Duration: 13 May 201217 May 2012


Conference2012 World Renewable Energy Forum
CityDenver, Colorado

NREL Publication Number

  • NREL/CP-5500-54540


  • analytical testing
  • ratings
  • solar water heater models
  • solar water heaters


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