Suchergebnisse

Suchergebnisse 1-3 von insgesamt 3.

  • Re: DC AC ratio

    Beitrag
    It depends on the definition and usually varies between different companies and institutions. Please note that the first ratio varies over inclination, orientation and of course location. Thus the value can easily get higher for an E-W-orientation and/or a higher inclination angle. Second version additionally heavily varies on local utility requirements and has to be considered separately. Anybody using a fixed value for both values has no clue what he's doing. Have you also tried asking this qu…
  • Re: DC AC ratio

    Beitrag
    Well, I would recommend you to use none of it. I do recommend to us a kWp to kW(dc_in) as a function of inclination, orientation and location. E.g. for southern Germany the factor could be 95% for a roof with an optimal angle of 35° facing south. In some regions in our world this could be >1 (e.g. south of USA)! Then there is the inverter efficiency, which you can approximate by using the European Efficiency (at least if the MPP-Voltage at higher temperature is close to the optimum input voltage…
  • Re: DC AC ratio

    Beitrag
    Sorry, made a typo in the above post. The correct formula is overall ratio (kWp to kVA(ac_out)) : 0,95 * 0,97 / 0,9 = 102%. Ciao Retrerni