IEC 61683:1999

INTRODUCTION
1 Scope
2 Normative references
3 Definitions
4 Efficiency measurement conditions
      4.1 DC power source for testing
      4.2 Temperature
      4.3 Output voltage and frequency
      4.4 Input voltage
      4.5 Ripple and distortion
      4.6 Resistive loads/utility grid
      4.7 Reactive loads
      4.8 Resistive plus non-linear loads
      4.9 Complex loads
5 Efficiency calculations
      5.1 Rated output efficiency
      5.2 Partial output efficiency
      5.3 Energy efficiency
      5.4 Efficiency tolerances
6 Efficiency test circuits
      6.1 Test circuits
      6.2 Measurement procedure
7 Loss measurement
      7.1 No-load loss
      7.2 Standby loss
Annex A (informative) Power conditioner description
Annex B (informative) Power efficiency and conversion factor
Annex C (informative) Weighted-average energy efficiency
Annex D (informative) Derivation of efficiency tolerance in
                      Table 2
Bibliography
Annex ZA (normative) Normative references to international
                     publications with their corresponding
                     European publications

IEC 61683:1999 Describes guidelines for measuring the efficiency of power conditioners used in stand-alone and utility-interactive photovoltaic systems, where the output of the power conditioner is a stable a.c. voltage of constant frequency or a stable d.c. voltage.