Measurement heights (Tamb and Wind velocity)

[Nedko]

Hello all,

As we are currently designing our measurement campaign for our solar projects, we were wondering at what height should we measure the ambient temperature and the wind velocity.

About the temperature, I couldn't find any specific height in the PVSyst documentation, so we decided to measure roughly at Array height (2-2.5m). This does make sense, right?

The wind speed required from the Meteo data is at 10m height. But the PVSyst documentation says it's not representative of the array height. Does it mean it is better to measure at array height? If that is the case, it will be more convenient for us, as our solar measuring stations are about 3.5m high.

Thanks in advance!

[dtarin]

It is common to install Tamb and Wspd sensors ~2m above grade (for 2P systems maybe higher). ASCE measurements for wind are taken at 10m height.