20 Watt Solar Panel

Lisa Said:

How many kWh will a 224 watt, 20 volt solar panel produce in one day?

We Answered:

Hi,
Answer:
1059.5 watt hours or 1.0595 kWh.

Comments:
E= P*t (Power multiplied time = watt hours if power is in watts and time in hours.
E=224*4.73
=1059.5 Watt hours.
1059.5/1000=
1.0595 kWh.

Notice that the voltage is already a component of the power. That is, P=EI. (Where I is current in amperes.) The voltage is only important if you're trying to run some device at the solar cell voltage or, say charge a battery. Normally you would have an electrical device between the solar cell and the driven device(s) to convert the solar cell output to the type (AC maybe for a driven device or a lower voltage to charge a battery.) and voltage necessary for the driven device.

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