Category: Energy Efficiency


The most powerful source of energy available to us is not from mankind’s invention or discovery but form the nature. This source of energy is the sun which has been around form the very first day the earth was created has been providing us with an energy that’s far more powerful than anything man has been able to invent. These days the solar energy is becoming the biggest alternative for current source of energy due to the reason that it’s cheap, effective, environmental friendly and long lasting. Solar power means the conversion of sunlight into usable electricity.

The sun throws huge amount of energy every day on the surface of earth, this sunlight consists of positively charged photons particles. Solar cells or photovoltaic are used to convert this energy into usable electricity. These cells are made up of semiconductors. The most common semiconductor is made up silicon mixed up with different materials.

These semiconductors made up of different materials provide different out put of energy. The amount of energy generated depends upon the number of semiconductors. These combinations of cells are known as modules and a number of modules form an array. When sunlight strikes the surface of these cells a certain amount of this energy is absorbed into the semiconductor.

This energy allows the electron of the semiconductor to go free. These cells have an electric field that forces the free electron to move in a certain direction. This flow of electron is the current. In order to draw this current, the cells are externally connected with metal. This current is in DC form but the appliances that we use needs AC power so a device called the inverter is attached to the cells to convert the energy from DC power to AC power. The surface of the cells is coated with different antireflective material so that the surface can absorb more photons.

Following are the different types of silicon material that are currently used.

  1. Single crystalline.
  2. Poly crystalline.
  3. Amorphous silicon.
  4. Multi junction.

The single crystalline cell is the most expensive available in the market but is also the most effective in absorbing the photons and generating power. The poly crystalline is less expensive due to the material type and that is the reason it’s not very effective and less preferred. For out door purposes amorphous are very durable but does not provide huge amount of power. In order to increase power output you need to increase the number of panels.The multi junction devices have very high conversion efficiency due to the reason that they capture a large portion of the solar spectrum. The material on the surface of a multi junction is also very effective and efficient in absorbing the photons form the sunlight and converting them into usable power, this is solar power. These semi conductors have a very long life, an average of 20 years so that you can have no problem with major breakdowns or power outage for a long time.

What is solar power? it is a green and clean energy source, click here to visit the Solar power info site.

With the price of oil hitting new all-time highs on a nearly daily basis, naturally the news has focused on our need to get off our oil dependence and seek alternative fuels. Every means of alternative, environmentally friendlier energy generation is back on the table: from wind and solar, to geothermal and hydroelectric. Cars are coming off production lines that go further on each gallon of gasoline than ever before and the electric and fuel-cell cars are on the horizon. Meanwhile the debate rages on about whether the United States should join the rest of the world as all fossil fuels are sought out in progressively more remote locations around the globe in an attempt to fill the demand gap until the alternative energy sources can fully come online and mass distributed.

It would seem that the focus of energy efficiency in the national news has been on the sources of energy and not the sinks–the end users. Electric companies, though, are not forgetting about their customer base. Utilities across the country are asking for customers to voluntarily yield certain controls to the power companies via “smart meters” and other control devices. With the promise of a lower electric bill, customers give the power company the ability to turn off certain appliances, control their thermostat, and shut down their computer. Additionally, these “smart meters” are also able to measure the little-known aspect of energy supply called the “power factor,” and allows the utility to charge more when it is not within acceptable parameters.

Aside from reducing their standard of living and being miserly with their light and appliance usage, alternatives for the common citizen to reduce energy consumption are in home improvements:

  • Placing solar panels on your roof may look unsightly to some; however, you may be selling some electricity back to the power company while you are at work. Tax advantages and credits may be available as an incentive though sometimes the math can be misleading. Often, calculations include the tax deductions you can take by paying for the solar panels using a home equity loan, causing you to pay more in interest and getting some back as a tax deduction. Funny may leads to a longer period of time to wait before the initial investment is returned as savings.
  • For those with available land, a windmill is an option provided the land lies beneath some strong trade winds. The benefits and drawbacks of wind energy are similar to those of solar energy: the financials only work in certain circumstances and the effectiveness is determined by the weather.
  • Updating the lighting around the home to compact fluorescent lights will save a considerable amount of energy and money. The cost to make the switch is relatively low, compared to other energy saving opportunities. The caution that is typically raised regarding these lights is that they contain mercury, a dangerous material should the light ever break, and there are questions related to the use of florescent lights and possible links to health issues such as autism. With careful handling and grown children, florescent lights remain an excellent means to energy reduction.
  • Improving the insulation in the attic can result in savings in your home heating and cooling efforts. The insulation in older houses especially should be inspected for effectiveness. Often, an older home will benefit greatly from the advances in insulation technology.
  • Unlike the “smart meters” that the electric companies are installing, a home energy controller has the potential to significantly reduce the draw of power to a home by optimizing the power factor. In so doing, reductions of 8-15% are common with far better, more atypical, results reported. With the costs of such devices rarely exceeding a few hundred dollars, it requires no “government math” to show affordability and the savings from using such a device generally pays for itself in a few years, less if the “smart meter” is already assessing a surcharge due to a low power factor.

Regardless of the means with which the common citizen will reduce their energy usage or the reasons for which they do so, the cost of energy is unlikely to lessen in the near future. Until the “magic bullet” is found–meaning, until a clean, limitless, portable source of energy is discovered, those who are able will make efforts to curb their energy consumption on a voluntary basis whenever possible. The question is: will you act now or when action becomes compulsory?

For more information on energy controllers and how they can save you 8-15% on your home electric bill and 15-25% on your business electric bill, visit http://www.covingtonenergy.com

Figuring out where to find cheap solar panels was very important to us since we were depending on them to provide most of our power needs. Now, when I talk about cheap solar panels I don’t mean poor quality- only cheap in the form of inexpensive. Nobody wants poor quality materials where the power needs of your home are concerned.

What were we looking for?

- Price per watt of solar panels of around $3

- Inexpensive, cheap solar panels

- High quality ones to buy

We set out to solve the problem in the only way we knew how to, we started gathering information.

First off we started looking at manufacturer pricing so we could determine what a good price was. We were looking for about 3000 watts of production power so that was about 30 panels of 100 watts (quite a few).

What we discovered first was that the larger the production output of each individual one usually means a better price. We could buy solar panels with 180 watts of output for a better price than 100 watt panels when we compared the price per watt. So the first lesson learned in our search was to buy the largest ones possible.

We also discovered some real glaring differences in price between many of the manufacturers. Price per watt was our deciding criteria so we kept looking and finally settled on three possible choices. Make sure you shop around when looking for cheap solar panels.

Another idea you might want to investigate is becoming a dealer of solar panels. You usually won’t find a better price on solar panels than if you buy them wholesale. Most companies off incentives of 10 to 30% discounts on pricing for their dealers. Of course they won’t let you just buy a couple solar panels at a discount though.

Most have a set minimum limit usually in the $5000 range that you have to spend to become a dealer and qualify for the discount. Now that’s not a big problem since you will probably be spending that anyways on your own renewable energy system.

The best way to sell something is to own it too. Who knows, you just might sell some to interested visitors… and you will have a few of those.

Perhaps you want the ultimate in cheap solar panels, how about free? That’s right free.

With a bit of time and some persistence you can find many different forms of solar panels from cheap to free. Just keep looking, cheap solar panels are all around, you just need to know where to look.

Do you want more information on cheap solar panels?

Cheap Solar Panels can be found in many different places.

Our family began living off the grid in 2001 and we have never looked back. Finding cheap or even free solar panels is very important because the more solar panels you have the more power output your home has. Find cheap or even free solar panels helps us immensely increase our power output.

There are a few ways to use the Sun’s energy to create home solar power systems. They can be categorized as passive and direct systems. Passive systems have been use for thousands of years and the inspiration behind such systems was probably the fact that our ancestors felt hot in the Sun. From this point they realized that the heat from the Sun can make water hot, cook food, dry clay bricks and countless other applications. Today there are systems that can passively heat the home living areas and the water used in the home. This article will not cover these topics but focus on the direct use of the Sun to create electricity for use in the home.

In terms of the use of solar energy, creating electricity from sunlight is a relatively new innovation. The technology needed to create electricity from sunlight was first developed to a commercially viable standard in the 1950′s. It is known as the photovoltaic (PV) cell. A PV cell is made of a silicon compound that reacts when photons from sunlight strike it. This reaction causes an electron from the silicon atom to be thrown loose. When a number of PV cells are linked together in a serial configuration, the electrons flow to a positive charge creating an electrical current.

A number of PV cells in a serial configuration is known as a solar module. When numerous solar modules are linked together in either a parallel or serial configuration they are known as a solar panel.

Solar panels are the devices that you may have seen on the roofs of houses in your neighborhood. They can be placed elsewhere, but the roof is often the most sensible place as it is likely to get exposed to direct sunlight and the panels can’t be damaged or vandalized as easily or take up room in the yard.

The solar panels create direct current (DC) electricity. This is often pushed through a power inverter. The inverter converts DC to alternating current (AC). AC is used in the home to power most appliances.

An electrical service panel or breaker box then distributes the AC to various electrical points in the house or to the lighting system. A utility meter manages your electricity usage if you are connected to the grid.

For instance, if it is during the day when the sunlight is at its strongest, most electricity will be produced. If this coincides with you being at work the chances are you won’t be using any of this solar generated power. Thus the meter may go backwards. This is effectively giving you credit for the electricity that you are creating with your home solar power system.

Your home solar power system can be connected to the grid as described above or it can be off grid. On the grid or grid tied (also known as a net metering system) is a way to make money with your solar panels. Many utility companies have their own set of rules governing this arrangement so you need to check with the company you are using beforehand. Many states have laws that dictate how the net metering system should work and what guidelines the companies should follow.

A true off grid system means you are not connected to a reliable power supply so you have the responsibility of creating your own energy. The primary source can be solar panels but there should always be a back up system in case you use more energy than you expected or the Sun doesn’t shine as much.

Many people will have a fuel powered generator for this purpose. People more interested in renewable power sources might go for a wind power generator or some other renewable system. Another aspect of an off the grid system is that DC needs to be stored in a battery bank for use at night or when the Sun is not shining. This is another responsibility and space has to be found on the property to securely house the batteries.

Most people start with a grid tied system as it is easier to use and there is less responsibility. As you gain more experience you may think about going off the grid. This form of home solar power system will save you money on monthly utility bills but more work to run and maintain.

Learn more about how do solar panels work and how a solar power AC inverter system works in a home solar power system at http://www.solarpowerappliances.com Adrian Whittle writes about using solar power and appliances that can utilize renewable energy sources.

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