Development of a Photovoltaic Module Energy Ratings Methodology

Research output: NRELTechnical Report


The National Renewable Energy Laboratory has begun work on developing; a consensus-based approach to rating photovoltaic modules. This new approach was intended to address the limitations of the defacto standard module power rating at standard test conditions. Using technical input from a number of sources, and under the guidance of an industry-based technical review committee, the approachdescribed in this paper was developed. The Module Energy Rating (MER) consists of 10 estimates of how much energy a single typical module of a particular type will produce in one day, one for each of 5 different weather/location combinations and 2 load-types. This paper presents an overview of the procedures required to generate an MER for any particular module type.
Original languageAmerican English
Number of pages10
StatePublished - 1995

NREL Publication Number

  • NREL/TP-411-8005


  • module energy rating (MER)
  • photovoltaic modules
  • photovoltaics (PV)
  • PV


Dive into the research topics of 'Development of a Photovoltaic Module Energy Ratings Methodology'. Together they form a unique fingerprint.

Cite this