The panel is about 150w per square meter. According to the pv design software, it is calculated that the radiation dose is 4kwh/m squared every day when the optimum Angle is 35 degrees. If it is a highly efficient battery, 150w is about 14.5% efficient, and the panels can generate 4*14.5%=0.58 KWH per day, or 0.58 kilowatt-hour.

You the table data I don't know where come of, don't feel quite right, radiation is the greatest time should be within 6 months, and you here in the summer of radiation is small, the winter is big, so strange. According to your data, the result is 14.5%*2.8=0.406 KWH, 0.406 kilowatt-hour, a little bit less.

The efficiency of the entire power generation system, if it is a small system, should be about 90%, which is the actual amount of electricity you get per day by 90%, which is 0.58*90%=0.522 degrees; * 90% = 0.406 to 0.3654 degrees.

Maybe it's the pollution, the weather or whatever, but I still think your data is a problem. You can see it again.

This table is based on your data, and it is very small.