I have some question about the starting up generating power

Spanky007 · Oct 4, 2012

Hi guys I have some problems with my work.My PV system uses the SMA inverter SunnyBoy 2100TL and when I kept the data from the Sunny webbox.The data at the waiting and grid-monitoring mode at the dc size have the voltage at 600 V while the maximum voltage that can generate from the PV at MPP mode is about 180 V.The waiting and grid-monitoring mode is operating at the morning and evening when the irradiance is only little.I don't know why it happen so I ask for your advice.

solarfred · Oct 5, 2012

The 600v is the maximum allowable DC voltage into this inverter. If you have an array with only 180v VMP then you will never get the best out of the inverter which needs 200v to work. Maybe you are reading the information wrong. What panels do you have and total voc/vmp?

finchy · Oct 5, 2012

Should use SMA sunny design to spec inverter and panel compatibility.

Spanky007 · Oct 6, 2012

solarfred said:
The 600v is the maximum allowable DC voltage into this inverter. If you have an array with only 180v VMP then you will never get the best out of the inverter which needs 200v to work. Maybe you are reading the information wrong. What panels do you have and total voc/vmp?

As you can see at 6.00 AM the Upv soll is 660 V so I just curious why it at that