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How Electric Power is Measured in Watts

Talking to many solar power consumers everyday, I’ve noticed one of the common issues people have a difficult time understanding how watts are measured. This post is dedicated to help you understand how watts are measured as kilowatt hours (kWh). We buy electricity in kWh from our utility company, which typically displayed on our monthly electric bill. To understand how much energy a solar power system will produce, you need to understand the following metrics.

Kilowatt (kW) = 1,000 Watts

Megawatt (MW) = 1,000,000 Watts

So what is a kWh?

Lets say you have a 100 watt light bulb and you run it for one hour, at that point you have consumed 100 watt hours and if you run that light bulb for 10 hours you would have used 1 kWh.

1,000 watt hours = Kilowatt Hour (kWh)

1,000,000 watt hours = Megawatt Hour (MWh)

For example, If you purchased a Sanyo 1.0 kW solar power system and lived in Los Angeles which has average sun hours of 5.5 per day, the system would produce 5.5 kWh per day depending on the pitch, orientation, possible shading issues and other variables.

Author: Deep Patel

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