solar panel power production

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watt – kilo watt usage?

I am researching applications of solar cell usage on small and possibly larger scales. However the answer to a simple problem eludes me. And i can think of no better place to try gaining an legit answer than here.

When measuring watt comsumption lets say in a light bulb at 60 watts. What is this calculation derived from? Is it watts per second, per hour or what?

Same thing with usage of solar panels watt production. lets say a 10 watt panel. Is this ten watts per second, per hour or what?

Im trying to to get a general idea based on my homes daily energy consumption how large or how high wattage panels i will need to sumpliment or all but eliminate need for high cost power companies energy.

Hopefully some one can shed some light here.

Watts are a unit of power. Power is energy per unit time. By definition, a watt is a joule per second. So the answer to your question is that a 60 watt light bulb requires 60 watts to power. It requires 60 joules per second. A 10 watt solar panel produces 10 watts, or 10 joules per second.

You will frequently hear the electricty company talk about kilowatt-hours. This is a convenient unit of energy (Power times Time). So if a 60 watt light bulb is on for an hour, then it has used 60 watt-hours (or 0.06 kW-hrs) of energy.

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