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1. The Euro Efficiency is an averaged operating efficiency over a yearly power distribution corresponding to middle-Europe climate. This was proposed by the Joint Research Center (JRC/Ispra), based on the Ispra climate (Italy), and is now referenced on almost any inverter datasheet. The value of this weighted efficiency is obtained by assigning a percentage of time the inverter resides in a given operating range.
2. The European efficiency reflect the performance of inverters. It proposes a weighted quantity (weighting factors) to quantify the performance of inverters and present the maximal reachable European efficiency. Also it is to use in the middle of European.
Euro Eff = 0.03 x Eff5% + 0.06 x Eff10% + 0.13 x Eff20% + 0.1 x Eff30% + 0.48 x Eff50% + 0.2 x Eff100%.
Inverter, Performance, Efficiency
http://files.pvsyst.com/help/inverter_euroeff.htm (1.); https://www.ti.bfh.ch/fileadmin/_migrated/content_uploads/132_4CO_2_5_valencia08_02.pdf (2.)
Author: Laura Saupe