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Call for tenders' details

Title:
Supply, installation and maintenance of 2 battery storage systems - 2 lots.
Contracting authority:
European Commission, Joint Research Centre (JRC)
TED publication date:
31/07/2015
Time limit for receipt of tenders:
28/09/2015
Status:
Closed
Status
02/09/2015
03/09/2015
italiano (it) English (en)
Question details
Annex 1 Lot 1 and 2 Key technical requirement B6
Is the efficiency understood as the ratio between the energy consumed and the energy given during a work cycle or instantly? In the first case [work cycle]: is the aim to be evaluated in AC (system efficiency) or DC (battery efficiency)? In the second case [instantly]: how can it be evaluated?
03/09/2015
Efficiency relates to the instantaneous power of the converter (excluding battery). In B6 efficiency is interpreted in the context of both battery charging and battery discharging modes. Efficiency should be > 90% (from 25% to 100% of rated power of the converter). The efficiency curve (at power factor=1) could be also provided in the offer.