**4.1 Experimental results in PV system**

The following results are obtained with data acquisition system Sunny Data Control. Totally, around 90 channels are recorded permanently. All channels are stored in SBC+ memory for maximum 8 days; after exceeding this interval the data will be lost if not transferred to the computer. Depending on the connected sensors the Sunny Boy Control+ can monitor all inverters and PV panels to ensure an even higher performance and more sophisticated system diagnosis.

Fig. 14. Remote monitoring of PV system

which injects a compensation current through the reaction loop. Figure 13 presents the front panel of the LabVIEW™ application which acquires and processes data in the AC circuit

Figure 14 shows a LabVIEW™ application (Ertugrul, 2002) to determine the characteristics

The following results are obtained with data acquisition system Sunny Data Control. Totally, around 90 channels are recorded permanently. All channels are stored in SBC+ memory for maximum 8 days; after exceeding this interval the data will be lost if not transferred to the computer. Depending on the connected sensors the Sunny Boy Control+ can monitor all inverters and PV panels to ensure an even higher performance and more

from the output of the phase B connected inverters.

**4.1 Experimental results in PV system** 

Fig. 14. Remote monitoring of PV system

sophisticated system diagnosis.

of PV panels, with the possibility of remote monitoring.


Fig. 15. Electrical quantities monitored

Figure 15 shows the LabVIEW™ application for the visualization of quantities monitored and the results are presented in Figure 16 (Andrei et al. 2010).

Fig. 16. Results of acquisition

The application allows visualising the phase diagram – Figure 17 - and obtains information on the quality of electricity produced by PV system – Figure 18.

Fig. 17. Phase diagram

Fig. 18. Harmonics (Phase A)

The application allows visualising the phase diagram – Figure 17 - and obtains information

a. Voltage b. Current

on the quality of electricity produced by PV system – Figure 18.

Fig. 17. Phase diagram

Fig. 18. Harmonics (Phase A)

After processing the data obtained with Sunny Data Control software following characteristics were obtained.

Fig. 19. Efficiency of a panel no.1 according to solar radiation

Fig. 20. Monthly electrical energy produced by each rows of modules

Fig. 21. Total electricity produced by PV system

The data acquisition system allows observation of the link between solar radiation, temperature and solar conversion result – Figures 22 , 23 and 24 .

Fig. 22. Solar radiation

The data acquisition system allows observation of the link between solar radiation,

Fig. 21. Total electricity produced by PV system

Fig. 22. Solar radiation

temperature and solar conversion result – Figures 22 , 23 and 24 .

Fig. 23. Temperature evolution of the 3 types of PV modules

Fig. 24. Variation of total power
