According to the wi-fi dongle on the solar array’s inverter my system produced 4 kWh of electricity in the afternoon only. This is because it was installed in the morning & only activated at 12:45 pm.
According to the blurb issued with the product, I can expect it to produce an average of 3.6 kWh daily throughout the year in this locality.
The sky was mostly overcast today, reducing the efficiency significantly.
So it a looks quite promising.