# Daily power output of solar panel below installed PV power We defined solar panel on the core zone of the roof using PhotovoltaicPerformance:Simple, assuming that the fraction of active solar cells is 0.5 and cell efficiency is 0.3. We compared the daily power output from the simulation with the power output of the installed PV and noticed that there were days when the daily power output was significantly lower.

Area of core zone = 150 sq.m

Area of 1 panel (assumed) = 1.5 * 05 sq.m

Number of panels on core zone = 100

Rated power of each panel(assumed) = 100 W

Power output of installed PV = 10 kW

Minimum daily power output from annual run of simulation = 2.3 kW-h

Maximum daily power output from annual run of simulation = 8.6 kW-h

Do these calculations look right? The daily power output doesn't particularly follow any trend for different months. The monthly power output for the array looks right. Any idea why we get such low values for daily power output?

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can you clarify in your question what you mean by energy and by power? Do you mean to say daily energy output in kWh?