No matter where you are on earth, the sun rises in the east and sets in the west. In the norther hemisphere the sun tracks more to the south that is why positions of panels and windows to the south take advantage of the sun the best.

You need to consider not only the direction but the tilt of the solar panels too in order to get maximum efficiency.
I have included sole links about solar position and positioning solar panels. Hope it helps.

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In todays increasing environmentally conscious society, reducing our carbon footprint is seen as a social responsibility. Furthermore, as traditional sources of power become evermore expensive, energy derived from renewable sources are becoming more attractive and sought after.

Herein lies the beauty of using the most efficient solar panels we can find as a means of providing some or all of our electrical power. Furthermore, the accessibility and affordability of efficient solar panels means that they are no longer looked upon as quirky but rather as innovative, sensible and ultimately cost-effective.

It is estimated, given the world governments’ increasing commitment to the use of renewable energy sources, that by the year 2030 some 14% of the world’s energy will be provided by solar power.

The term solar panel actually describes two types of device, to give them their technical names:

1. Solar photovoltaic modules

2. Solar thermal collectors.

Solar thermal collectors use the sun’s energy to heat water (in domestic use) or other fluids. A good solar hot water panel is able to provide an average household with around a third of its annual hot water supply.

However, it is with the photovoltaic modules (solar panels to you and I) that we will concentrate on here. These panels use solar sensitive cells to convert light energy from the sun into electricity and thereby provide a clean source of energy with no waste by-products.

For the science minded, photons from sunlight knock the electrons into a higher state of energy thereby creating electricity, passing the current so produced through a photodiode to power equipment or to recharge batteries.

Solar cells are interconnected and assembled into panels which require protection form the environment to allow them to continue to work effectively. Consequently, these panels are placed into a frame made of metal, plastic or fibreglass and glass fronted. The construction of the frame within which the solar cells are housed is vital. This is because the solar cells themselves are commonly made of wafer-based silicon and due to their being brittle they need protection from the elements, particularly impact from hail, wind and snow and from moisture, which would corrode the metal contacts and connections. A solar panel installation usually consists of multiple panels called an array.

The use of solar panels is becoming evermore popular and production has been doubling every two years, increasing by an average of 48% each year since 2002.

Building integrated photovoltaics (BIPV) are increasingly being integrated into new domestic and industrial buildings either as a principal or an ancillary source of electrical power. In new builds, the arrays are incorporated into the roof or walls of the building and roof tiles with integrated PV cells can now be purchased.

For existing buildings, arrays can be retrofitted usually on top of the existing roof structure. Alternatively, arrays can be located separately and connected by cable to provide the power supply for the building. Arrays are usually installed in a position angled so as to allow access to as much sunlight as possible to increase their efficiency.

This article was written by A R Forshaw.

For more information please see http://most-efficient-solar-panels.blogspot.com/

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Hey Hockey, here’s my short answer, there is no “Best.” Not trying to let the wind out of your sails, but it’s like asking, “What’s the best car to buy?” If you have kids, the minivan is hard to beat, but it sucks as a 4 wheel drive SUV. solar panels all use the basic same type technology, but to compare features goes a whole lot deeper into the rabbit hole. If you live in Chicago and have limited roof space, it’s probably worth spending the extra buck and getting Sunpower units, they produce the most per square foot. If you want more hours of energy without tracking, single crystal is the way to go. If space is not an issue and you’re using rolls batteries, and a fixed rack, a multicrystal might be better for you. The point is, first determine what you want to do, then decide what product will fill the perscription the closest.

If you are really in the market for panels, my suggestion is to get a sub to Home Power Magazine. Then use your account info at their website to scour past issues. They had one about a year ago comparing all commercially available solar panels by all manufacturers, about a 9 page spread, with all their specs, including warranty info, power curves, and so on. Then you’d be in a position to make a real decision.

We’ve been powering our home for almost 10 years now with solar and wind. In our case, we selected Kyocera KC-120s, a multicrystal panel, installed on fixed racks. The cost, availability and warranty was the deciding factor. Turns out we had one panel go bad last year, something even my installer never had happen. Kyocera paid round trip shipping and installation cost in addition to sending me a new panel for no charge, they really stood behind their product. In my experience talking to other solar knuckleheads like me, most of the manufacturers are doing the same, because they have very little trouble with their products. Most panels are warrantied for 25 years, and typically they run much longer than that.

The Sharp is a good panel by the way, I know two people that have been using them for a few years, and they love them, mainly because they don’t ever have to look at them to keep them working. It’s been much the same with all our panels too. Check out Home Power, and some of the non profit groups I have listed below. In the end, whatever you decide to do, you will at least be well informed. Take care, Rudydoo

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Sharp EL243 Solar Pocket Calculator $19.25 extra-large display for easy readability. automatically switches from solar to battery power in low light. calculator type: non-printing; calculator style: basic; power source: battery;solar.

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try http://greenhome.huddler.com/products/

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CONTACT:

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P.O.BOX 1513
Amagansett, NY 11930
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One reason is the amount of land taken up. As the questioner pointed out… “acres and acres” of land would be needed. Open land (what there is left of it) is needed for crops (read: FOOD) for forests (read: CARBON SINK –and human sanity!), for habitat for animals and birds. (For an eye opener do some research on how many bugs we’d have if we didn’t have birds — O! M! G! Without lots of birds, we will either drown in hordes of insects or in toxic chemicals trying to kill the insects, and end up killing ourselves instead.)

Even in the desert, habitat is destroyed by building acres and acres of solar panels, then you still have the inefficiency and huge cost of the transmission lines to get that power to where it’s wanted. Even the more-efficient parabolic reflector method takes up a lot of space, and still requires the large — and ugly — transmission towers marching across miles and miles of the countryside.

As was pointed out by others, solar makes more sense when done by individuals or small groups.

Now think of all the rooftop space in cities! You have people living and working directly under a possible site for solar panels. The panels would also create shade that would lessen the cooling needs of the same buildings. In Europe I understand there are cities and towns where almost every roof has solar panels. That is space that is NOT habitat or used for crops! (Except some buildings’ rooftops are now being used for rooftop gardens for FOOD! Another creative and wonderful idea!)

Solar could be just one answer. There will be many answers. Some large-scale, some done individually– home by home, building by building. But huge solar “farms” probably are not going to be a final answer.

Wind towers take up a lot of space too. They make noise that, if close to a home, is considered by many to be quite objectionable. The towers are huge, the blades are huge. They often kill birds that try to fly past. If you think it’s ok to kill birds, read up on the status of many bird species (declining), and where we’ll be insect-wise if we lose too many of our birds!

Wind turbine towers need to be very carefully sited in order to catch the winds, but not sited on the birds’ flyways. And of course they are very often the same, because birds use consistent wind current flows during migration to be able to travel so far without using as much of their own energy. Consistent wind currents are what the wind towers need also. There is a new design that is shaped different, more like a thick vertical tube, that operates something like the “squirrel-cage” fan, as opposed to a “blade” fan. These could be safer for birds. I do not know enough about them (yet) to say any more.

Wind power would need the same miles and miles of inefficient transmission lines as solar power needs when done in large “wind farms.” Even if an individual puts up a wind turbine, he/she will have to deal with huge batteries (I saw one installation that had a 2- or 3-car garage-sized building for the batteries) and they’ll also need transmission lines to get the power to their own home, even if it’s nearby.

I personally don’t like the wind towers on the landscape. They’re very tall, much taller than they look in pictures. I also know that we need, NEED the birds to keep insect populations down, if for no other reason!

Conservation (just plain using less) almost always is the most efficient way to save energy. That comes first. Do everything you can to simplify your lifestyle. Insulate and tighten your home; turn the heat down a bit in the winter, and the cooling up a bit in the summer. Drive less, share rides, drive slower, choose a fuel-efficient vehicle, and keep it well-maintained. Don’t do it alone, do it all with friends: compare notes, check how you’re doing. Make it a group or neighborhood thing. Don’t think of it as a YOYO (You’re On Your Own) project; it’s for all of us to do, and it’s easier when done together.

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Solar panels and photosynthetic life forms both utilize the photoelectric effect discovered by Einstein, who won a Nobel price for this discovery. Light absorbed by solar panels or chlorophyll molecules will cause an electron to be emitted. These electrons are turned into electricity by solar panels. The living cells turn the electrons into energy stored in the glucose molecule through a complex biochemical process.

Lizards and other animals, including vultures and humans, may bask in the sun to absorb heat. Some solar panels do not generate electricity, but heat.

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I think they are experimenting with all kinds of materials for PV cell construction.

Cadmium telluride
Copper-Indium Selenide
Gallium arsenide (GaAs)
Light-absorbing dyes
Organic/polymer solar cells

I don’t know what the environmental impact of these things is, if anything.

If you’re looking for negatives to solar power, crystalline silicon cell manufacturing is very energy-intensive. It involves molten silicon which must be heated to 1600 C or 2900 F.

The cells have to spend a long time in the sun to produce more energy than it takes to make them.

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If yours are covered in glass, like mine, try those window washer thingies that they use in gas stations. I know you will have to climb up there to use them, but it makes it quite easy and quick to clean…

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When buying a recreational vehicle (RV), you have the option to choose a vehicle that comes with a gasoline generator or one that uses solar energy. These options are important because it supply the power needed to charge the on board battery bank.

An RV that uses a gas generator is cheaper in comparison to an RV that uses solar panel. When the motor home is parked, you can have a constant supply of electricity to the living compartment by firing up the generator.

However, a gas generator is noisy and creates a lot of pollution. When you are in the natural wilderness, the last thing you want to do is pollute it with smoke and loud noise. Using a generator can be expensive also because you have to constantly top it up with gasoline.

Many RV owners would rather opt for the solar power system option. It is clean, efficient, zero pollution, no gasoline required and also minimal maintenance. All you have to do is wipe it clean once a week.

The drawback on an RV with a solar power kit is the high cost. A typical system that can produce 440 watts of power will cost upwards of $3,000! It is a great option but some people don’t think it is a worthwhile investment.

Is there a cheaper alternative? As a matter of fact, there is. You can buy a regular RV and then install the solar panels via a Do It Yourself (DIY) approach.

However, there is a caveat. You must be able to understand electrical wiring diagrams and know how to configure electronic gadgets by reading its user manual.

A solar system for a recreational vehicle is actually quite simple. There are only 4 keys components which are the solar panels, charge controller, battery units and power inverters. There are also a couple of smaller parts such as volt meter, amp meter, DC disconnect, cut off fuses and system monitor.

All of the solar components can be purchased off the selves from major hardware stores around the country. You can lower your investment budget if you were to do your shopping during holiday period or when there is a shop bargain or discount.

What would be the average cost to setup a homemade RV solar power system? A generic solar energy setup which can produce about 460 amp hours of electricity will cost approximately $1,500. The next step is to find a good solar system step by step instruction manual with technical diagram.

Looking for more ideas on how to use solar power for RV? Learn how to build your own DIY solar system by downloading a free copy of “30 Solar And Wind Power For Homes Videos” e-book at http://www.diysolarenergy.info/

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The components of a solar panel are designed to be inert: they sit exposed to the environment for 20 or more years with little degradation.
The creation of photocells is not so benign: it takes a fair amount of strong chemicals and energy to produce a photovoltaic panel. The payback, economically and in terms of environmental damage (tradeoff on energy/chemicals used to create it vs. CO2, Hg etc. reduced during cell’s lifetime), may take twenty or thirty years.

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