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Solar Panels And Biodiversity



Solar panels use is increasing day by day as it is a key ingredient to produce eco-friendly and renewable source of energy. As the energy need will increase in future so far that a lot number of solar panels will be used all over the world. But researchers take it as an eco-conservative concern.

Solar Panels Threat to Biodiversity

Danger to biodiversity

Mr. Bruce Robertson, Research Associate, from Kellogg Biological Station, Michigan State University says that it is a possible threat to biodiversity. He told that shining dark surface of the solar cells, which reflect the sunlight is same like water surfaces that result aquatic insects like mayflies depositing their eggs on the solar panels. The solar panels will be posing a false habitat hazard to more than 300 species of insect. It will lead to a reproductive failure that may have far-reaching cascading adverse effects to the food chain. These insects fall prey to predators. This data was given in the research which was held in Hungary.

False Surface

Mr. Robertson and his colleagues after the research in Hungary had told in their article that reflected sunlight from expanses of the dark surfaces which are shiny like glass-clad buildings, vehicles, solar panels of all sizes are causing worry for polarized light pollution. Because such dark shiny surfaces cause the caddis flies and other aquatic insects to mistake shining surface to be water surface to lay their eggs.

How to reduce that threat?

According to Mr. Robertson white marking the solar cells may reduce this threat to a great extent. The calculations made by him shows that white marking the solar panels will not affect the efficiency of the solar panels. The researchers had discovered that the aquatic insects can be warned off by fixing white-color grids and other methods to break up the polarized reflection.

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Solar Electric Fence



Electric fences are cost-effective, alternative to traditional fencing. These electrical fences are safer for animals than wire fencing. But question is that how to make electric fence if no alternate current is available. Well don’t worry you can install solar powered electric fence easily.

Solar Electric Fence

Here are the instructions to create a solar electric fence:

  • First of all choose a fence system which is suitable for your application. Which animals you want to control, and whether the fence will be temporary or permanent.
  • Buy solar fence charger and its accessories. Surf on internet about solar electric fence or if you have any such farm nearby then visit there, then go to hardware stores for comparing the systems.
  • When you start with your fence, start with end and corner posts and stretching a string between them to mark where to place your line posts. When line post are set then stretch the wire or mesh, which you selected around the perimeter. Then attach the insulators and tensioners.
  • Fit the solar electric fence charger on the one end of the fence on a brawny mounting plane for example, a building or wooden post in direct sunlight facing south. Then dig a shallow trench to make a ground bed near the fence charger and drive in the number of ground rods recommended for your installation. In final step, attach the negative (ground) lead to the grounding rods and the positive lead to the fence.
  • You must charge the charger in the direct sunlight for at least 24 hours before energizing the fence. After 24 hours, when you energize the fence then check energizing of fence regularly. For checking always use electric fence tester.

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Advantages and Disadvantages Of Using Solar Panels



With the increase in awareness about the depleting natural resources, the lookout for new, renewable, and cleaner energy sources has also gained pace.

Solar energy is one of the main sources of renewable energy. Being clean and free of cost, it can be utilized easily to generate energy. Solar panels are used to harness the sun’s energy, but it does not come without any pros and cons.

Advantages of Solar Panels

1. Accessibility

Solar panels allow you to obtain energy from an alternative source rather than the main power grid. This eliminates the need of having long power lines running to your home. This can prove to be especially beneficial for houses that are located in far off areas.

2. Long-term Efficiency

Once installed, solar panels can make up for their initial installation investment as they do not require any extra fuel to work. This means that you can rely completely on solar panels and see a return on their investment immediately, with no more electric bills. Solar panels also require very little maintenance.

3. Incentives

There are several federal and government incentives available that are offered to those who plan to install solar panels on their homes. This is available in the form of tax credits for homes and businesses. Solar panels also tend to increase the value of a home or business.

Disadvantages of Solar Panels

1. Positioning

It is important to place solar panels in an appropriate place where they can receive the maximum amount of energy from the sun. Solar panels have minimal efficiency in cloudy areas, and can also be less effective in areas where there is heavy tree cover.

2. Initial Expense

The initial cost of installing solar panels can be quite high. Studies show that extensive use of solar panels in homes may not yet be a financially suitable option due to their high costs.

3. Impact of Geography

Rather than depending on the strength of the sunlight they receive, solar panels tend to rely more on the number of hours in the day that the sun is out. Thus, solar panels are less efficient in places closer to the poles.

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Installing Solar Cells In Your Home



Solar cells can be used to directly convert sunlight into electricity, making the home owners more energy independent. Most commonly, solar cells in homes are used through the installation of solar panels.

solar home

Solar panels can collect sunlight during the day and transform it into energy. The stored energy can be used to supply power to the home by heating water and producing electricity. Although installing the solar panels can be simple, but it can be physically demanding.

1. First of all, you need to purchase a solar panel mounting kit. Usually, kits contain the same types of materials, such as solar panels, mounts, hardware, an inverter, and a voltage gauge. You can purchase the kits at any home improvement store.

2. Using a stud finder, locate all the roof rafters. Make a straight line over the rafter locations using a chalk box. This will help you to make a nicely designed array of panels.

3. Pre-drill the solar panel mounts to make sure that the rafters do not break up while you are the installing them.

4. Using the stainless steel lag bolts included in the mounting kit, fasten the mounts to the roof.

5. Using 3/8″ stainless steel bolts and brackets included in the mounting kit, attach the solar panels to the mounts. Keep in mind that the bolt size may vary depending on the brand of solar panel.

6. Attach the panels to an inverter using an electrical tool.

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Four Main Sources Of Renewable Energy



With only a limited supply of oil and gas available on Earth, it is extremely important to find alternative sources of energy or else with the depletion of these natural resources, humans will be unable to fulfill a number of basic requirements.

4 sources

Renewable energy can be defined as any form of power that is derived from a source that cannot be depleted. Wind, solar, geothermal and tidal are examples of renewable energy.

There are several benefits of using renewable energy. It has some dominant environmental, economic and societal advantages. Renewable energy sources do not need any fossil fuels to generate power, which makes them environment friendly. Following are the main sources of renewable energy.

1. Wind

Wind energy commonly used to generate clean power, through the use of wind turbines that harness the power of offshore or land-based wind and convert it to electricity.

2. Solar

Solar energy can be utilized with the use of solar panels that allow us to use the enormous power of the sun to heat and lighten up our homes. Being made of photovoltaic cells, solar panels can easily be applied to roofs and even cars, to transfer sunlight to electricity.

3. Geothermal

The Earth’s core is the home to huge amount of heat. With geothermal power, the heat generated by the Earth can be used to by pulling it up to the surface using pumps.

4. Tidal

As the Earth comprised up to 70 percent of water, tidal energy presents a great source of renewable energy. Imagine the amount of power that many waves can produce. Tidal power uses the natural ebb and flow of the waves to generate electricity.

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Specifics about Solar Energy



Installation of solar panels at home assists you in two ways; one is that you get cheapest energy for your home and second it increases your home value. Modern solar systems are more accurate, efficient and easy to install. Though initially installation of solar panels cost you much, but on long term you really know that your investment won’t go in vain. When the solar panel will be installed, the costs depreciate over time. The system itself adds value to your home. Overall, you get inner satisfaction that you are using clean and non-polluting systems.

Six Things That Makes Solar Energy a Better Choice:

  1. Unlike other energy sources like oil, coal, or natural gas, solar energy is a free source.
  2. If you sell back the extra electricity to the electric company made by your solar panel, you can have no electric company bill.
  3. You can share the costs and benefits along with your neighbors but that also under certain circumstances. For this check the local laws and restrictions if its possible in your area.
  4. Solar energy is a clean power and haves very low environment effect. It have no emissions, no maintenance costs and no unstable fuel costs.
  5. You can have government sponsored rebates, financial incentives and tax credits also.
  6. Most important factor is that solar power peak production time is same when the electric company is having peak usage time and highest rates. This benefits you because at that time you do not need to use the most expensive type of power company electricity.

Some Important Facts about Solar Energy:

Apart from other facts, first you must know how solar energy works, what is the lifetime of your solar panels and how can you improve the value of your home and reduce costs?

Here are some facts about solar energy:

Solar Energy is not so complicated:

Solar panels get the sunlight on solar photovoltaic (PV) cells, which then activate electrons. Then the electrons jump from atom to atom and make a chain of electricity that runs through a charge controller in the form of a DC charge. That charge can be stored in a battery which you can use as 12 volt DC current or transform it by using an inverter to 110 volt AC current. AC current is used mostly in home appliances.

Durability of Solar Panels:

Though the full sun is best for your solar panel for producing the energy, but it is operational also in other conditions. The life of solar panels can be from 3 to 25 years. Most of solar panels are having warranty of 10 to twenty years.

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Ten Major Benefits of Solar Energy



Sunlight is made of tiny packets of energy called photons. Every minute enough of this free energy reaches the earth that it can meet all of the world’s energy needs for a full year.

Solar Energy

I will discuss here the major ten benefits of the solar energy:

1 - First of all we knew that solar energy is a renewable energy. So there is no need to worry that sunlight will run out or will be used all up. Sun is a permanent source of energy and it will be there everyday.

2 – Solar energy is having no harm impact on the environment means its environment friendly. As fossil fuels that release the greenhouse gases, carcinogens and carbon dioxide while solar cells don’t release any harmful elements in the atmosphere.

3 – Solar panels are so much durable and are having no moving parts that you worry about replacing anything. Solar panels continuously produce the electricity for 1000s hours with little or no maintenance.

4 – Another good thing about solar panels is they won’t make any noise while collecting the energy. Unlike other renewable energy sources,solar panels are completely silent.

5 – If we compare solar electricity with Power Company electricity on long run solar electricity is lot cheaper than power company electricity. Though in beginning it cost much but later on it starts paying itself.

6 – Solar panels are having vast variety which is available in the market. Some are having extremely high prices and some are having lost costs. That means anyone can buy it according to his capacity.

7 – Because of solar energy you can get rid of the power grid. That looks absolutely great when you have to pay any monthly electric bill.

8 – If you will be producing excessive electricity through your solar panel system then you can make you electric meter spin backwards. Most of power companies will like to buy or credit you for this excess electricity. You can get more details about that from your power companies.

9 – Most governments are having tax credit or any other incentive for the people who purchase the solar energy systems. That rebate provided by the government cover usually 20-30% of the system cost. More details you can get from the local representatives.

10 – Best thing is that solar technology is improving day by day. Solar installations are increasing rapidly with the ratio of 50% every year and from them most are the small homemade solar systems.

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Solutions To The Solar Powering Problems



Solar energy may be the most abundant source of energy, but many people avoid its usage due to the uncertainty of the weather. If you use solar energy to power your house, then what do you do on a cloudy or rainy day?

solar probs

There are three main alternative options available that can provide unlimited power even if the sun isn’t cooperating. In case you want to live independently, completely off the grid, but can’t trust your PV panels to supply all the electricity you’ll need all the time, you can use a backup generator when the solar generation becomes low.

Secondly, you can use the energy storage in the form of batteries. Although batteries may increase the initial and maintenance cost to a PV system, but it can enable you to enjoy uninterrupted power supply especially if you want to be completely independent.

The third option is to connect your house to the utility grid. You don’t always have to buy power. You can get it when you need it (when your solar system goes low on power) and sell it back when you produce more than you require. However, do bear in mind that government regulations may vary depending on location and are subject to change. There are other issues to cater as well, such as the buyback price may vary greatly and you’ll also probably need special equipment to make the power you’re selling to the utility company compatible with their own. Safety is another issue as well.

Although batteries are an easier and better option,so remember that they will have to be maintained and eventually replaced after a certain number of years.

PV systems batteries can also be very dangerous due to the energy they store and the acidic electrolytes they contain. Due to this reason, you’ll need a well-ventilated, nonmetallic enclosure for them.

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Solar Powering Your House



We all want to make use of the solar energy, using to power our houses. Although it’s not as simple as just placing some modules on your roof, it’s not very difficult to do either.

solar house

The first thing to consider is the direction of your house as every roof does not have the correct orientation or angle of inclination to take full advantage of the sun’s energy.

Ideally, non-tracking PV systems in the Northern Hemisphere should point toward true south, but orientations that face in more easterly and westerly directions can work too, with decreased efficiency howsoever.

It is also important to incline the solar panels at an angle as close to the area’s latitude as possible in order to absorb the maximum amount of energy all round the year.

You can increase the energy production level by using a different orientation and/or inclination for the morning or afternoon, or the summer or winter.

Obviously, the modules should never be put in a place where they are shaded by nearby trees or buildings, no matter which time of the day or the time of year it is, to maximize production.

If you have a roof that is unshared and southward-facing, then you will need to decide the size of system you need. This might be a little complicated as electricity production through solar means depends on the weather, which is never completely predictable, and your electricity demand may also vary.

However, you can solve these issues easily with a little help. Use the meteorological data to find out the average monthly sunlight levels for different geographical areas. This takes into account rainfall and cloudy days, as well as altitude, humidity and other more subtle factors. Design your system for the worst month, so that you’ll may have enough electricity all round the year.

Together with this data, and your average household demand which you can find out through your utility bill, you can easily determine the number of PV modules you’ll need.

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Energy Loss In A Solar Cell



Whenever we think of solar energy, we assume that it is just simple sunlight, ignoring the fact that visible light is just part of the complete electromagnetic spectrum.

energy loss

It is important to keep in mind that electromagnetic radiation is not monochromatic, it’s made up of a wide range of different wavelengths, and therefore different energy levels.

It is possible to separate light into different wavelengths, which can be seen in the form of a rainbow. And as the light that falls on our solar cell has multiple photons carrying different ranges of energies, some of these photons don’t have enough energy to alter an electron-hole pair.

This means that they’ll simply pass through the cell as if it were transparent. However, other photons may have too much energy. Only a specific amount of energy, which can be measured in electron volts (eV), and is about 1.1 eV for crystalline silicon, is needed to loosen up an electron. This is called the band gap energy of a material.

In case the photon has more energy than the required amount, then this extra energy is lost. Thus if the photon has less energy, or has too much energy, in both the cases energy will be lost. These losses can account for about 70 percent of the radiation energy incident on our cell.

Question arises that why can’t we use a material that has a really low band gap, so we can use more photons? But this is not possible as unfortunately, our band gap also decides the strength (voltage) of our electric field, and if it’s too low, then whatever we make up in extra current through absorbing more photons, we will loose by having a small voltage.

Balancing both these effects, the optimal band gap can be found around 1.4 eV for a cell made from a single material.

However, these aren’t the only losses that we face. The electrons have to flow from one side of the cell to the other through an external circuit. The bottom can be made with a metal which allows good conduction, but if the top is completely covered, then photons can’t get through the opaque conductor and we lose all of our current.

Also, as silicon is a semiconductor, its internal resistance is fairly high, leading to high losses. To minimize these losses, cells are typically covered by a metallic contact grid that shortens the distance that electrons have to travel while covering only a small part of the cell surface. Even after this, some of the photons are blocked by the grid.

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