I.S. EN 61683:2000

FOREWORD
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
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications
Bibliography

Defines guidelines for measurement of the efficiency of power conditioners used in stand-alone and utility-interactive photovoltaic systems, where output of the power conditioner is a stable a.c. voltage of constant frequency or a stable d.c. voltage. Efficiency is calculated from a direct measurement of input and output power in the factory. An isolation transformer is included where applicable.