IEC/TS 62600-100:2012(E) provides a method for assessing the electrical power production performance of a Wave Energy Converter (WEC), based on the performance at a testing site. Provides a systematic method which includes: - measurement of WEC power output in a range of sea states; - WEC power matrix development; - an agreed framework for reporting the results of power and wave measurements. The contents of the corrigendum of April 2017 have been included in this copy.