Operation Modes VI Constant V (CV) or Constant I (CC) VIP V Constant I falls when V*I reaches limit P VIR V sags to emulate a resistor of R ohms PV Sim IV Curve In the Pvsim mode the characteristics of a PV generator can be simulated. Open-circuit voltage Vo and short-circuit current Ik. Value for Vmpp may be in the range from 0.6 to 0.95 * V. Value for Impp may be in the range from 0.6 to 0.95 * I. See additional datasheet for more details