by Solargies

Created on: June 08, 2008   Last Updated: June 09, 2008

If you aren't an electrician or electrical engineer, you may find terms for electricity a bit confusing and a little illogical at times. You will learn the basic terms associated with electricity and some general information related to residential solar electric systems. The bulk of this article will focus on the important terms, principles, and technical definitions related to the electricity flowing through your house.

The intent of this article is to help you to understand enough about electricity so that you can understand the technology used in solar photovoltaic (PV) systems. You most likely will review a lot of information and learn many new solar energy terms when you begin the process of purchasing or renting a home solar power system.

When you start researching residential solar energy systems, or even taking a close look at your electric bill, you hear a lot about kilowatts and kilowatt hours. You may have used these terms mistakenly as the same thing in the past. They are pretty close in meaning. Both terms are just a measure of relative electricity sizes.

However, they are very different measurements, as you will learn through the electricity definitions included here. In order to understand what they mean, you also need to understand a few basic concepts about electricity.

When talking about electricity, you will be using terms like power and energy. The average person often uses these terms interchangeably in daily speech along with current, potential, charge, electrons, and even photons. You might have learned about all of these electricity terms way back in high school. In use as part of your daily life, you may have confused their meaning.

Common Residential Electricity Terms

Here are the most important electricity concepts you need to know when you begin the process of purchasing or renting a solar energy system for your home. It may be surprising to you that the actual meaning of a few of these is not quite what you expected.

Power: The rate at which work is performed or energy is provided. Power is the amount of energy required or expended for a given unit of time. It is measured in watts (W).

Energy: The actual work done by solar panels installed on your home. In other words, energy is power supplied over a period of time. It is typically measured in joules or watt hours (Wh).

Potential: The capacity of an electric field to do work (i.e. to provide energy). This is similar to the height of water behind a dam. It has capacity to do work. The higher

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