Installation manual

5.14.1. MPPV and Voc considerations

Operation with MPPT controllers and with grid-tied inverters are very similar situations for

PowerSpout turbines. It's important to make sure that the turbine best operating voltage

("maximum power point voltage" or MPPV) is within the range that the MPPT device can

work over. It's also important that the Voc of the turbine is not so high as to damage the

MPPT device.

Any inverter selected must have an MPPT operating range lower than 170/200 V DC.

Maximum input voltage for the inverter must be 500/600 V DC. There is no guarantee that

an inverter will MPP track and work well unless it is approved for hydro applications by the

inverter manufacturer. Only a small number of grid connect inverters are approved for hydro

input, most that we have tested worked well. The manufacturers may refuse to cover failures

under warranty if the equipment is not approved for hydro applications.