Suppliers & Installers of :               WIND & SOLAR ENERGY

 

Solar ENERGY

From an environmental perspective, solar power is the best thing going. A 1.5 kilowatt PV system will keep more than 110,000 pounds of carbon dioxide, the chief greenhouse gas, out of the atmosphere over the next 25 years. The same solar system will also prevent the need to burn 60,000 pounds of coal. With solar, there's no acid rain, no urban smog, no pollution of any kind.

Mankind has been crazy to have not bothered to harness the sun's energy until now. Think about this. Go outside on a sunny day. The light falling on your face left the Sun just 8 minutes go. In that 8 minutes it traveled 93 million miles. Those photons are hauling and when they strike your PV module you can convert that motion to electricity. As technology, photovoltaics are not as glitzy as that new sport utility vehicle the television tells us to crave. But in many ways PV is a much more elegant and sophisticated technology.

Whether it be for your business or for your home, why not invest in Solar Panels.Today's solar panels are bombproof and often come with a 25 year warranty or more. Your solar panels may outlive you. They are also modular—you can start with a small system and expand it over time. Solar panels are light (weighing about 20 pounds), so if you move you can take the system with you.

Grid interactive systems and net metering

Some utilities object to net metering. Usually the issue isn't money, but control. They don't want your juice on their wires or they don't want to set a precedent that could come back to haunt them. There are some distributed generation technologies coming down the pike that utilities definitely won't want to net meter, including fuel cells and 50 kw microturbines the size of beer kegs. However in the USA and Australia  electrical generators are becoming more supportive of solar energy buy back schemes.Also business can now take advantage of different suppliers of both gas and electricity and shop for the most economical. 

Solar advocates delight in bashing utilities. But for all its faults, the industry has strung an amazing amount of wire. Rarely is an American or an Australian, or a European more than 50 feet from an electrical outlet. It's an everyday miracle we take for granted. From an engineering perspective, the grid is a tremendous resource. A grid-tied PV system will be more efficient, arguably greener, and certainly cheaper than a backwoods one. More efficient because the inverter can track the modules "maximum power curve" rather than the lower voltage needed to recharge batteries. Arguably greener because you don't need batteries, which contain caustic chemicals, emit sulfurous gases, and eventually wear out. And much cheaper because, with the grid as backup, you don't have to buy batteries, charge controller, control panel or generator.Right there, you've knocked OFF  LOTS of $$$ of of a typical stand-alone system. Getting the price down is critical, because no one on the grid needs PV, at least not in the same way an off-grid homeowner needs it. We've already got juice. It may be from a nuke, it may be from a coal plant, it may be hydro (or "embodied salmon"), but it's there. To sell grid-connected PV systems you've got to get the price down and then help prospective customers understand that solar is to coal as a croissant is to a Twinkie. On a gut level, many people already grasp the key difference between fossil fuels and renewable energy. One is stealing from our kids, the other isn't.

The current cost of solar panels means that grid-interactive systems do not pay for themselves in terms of the cost saving when compared with electricity from the grid. In spite of this, many people with grid connected houses are choosing to install grid-interactive solar systems, as they do not create any greenhouse gases when generating electricity, unlike coal-fired power plants. Numerous studies have demonstrated that the equivalent amount of electricity used to make a solar panel is generated by the panel within the first two years of operation, hence a solar panel will repay its greenhouse gas "debt" within this time.

 

Wind ENERGY

Societies have taken advantage of wind power for thousands of years. The first known use was in 5000 BC when people used sails to navigate the Nile River. Persians had already been using windmills for 400 years by 900 AD in order to pump water and grind grain. Windmills may have even been developed in China before 1 AD, but the earliest written documentation comes from 1219. Cretans were using "literally hundreds of sail-rotor windmills [to] pump water for crops and livestock."

Today, people are realizing that wind power "is one of the most promising new energy sources" that can serve as an alternative to fossil fuel-generated electricity. The cost of wind has dropped by 15% with each doubling of installed capacity worldwide, and capacity has doubled three times during the 1990s and 2000's.As of 1999, global wind energy capacity topped 10,000 megawatts, which is approximately 16 billion kilowatt-hours of electricity. That's enough to serve over 5 cities the size of Miami, according to the American Wind Energy Association. Five Miamis may not seem significant, but if we make the predicted strides in the near future, wind power could be one of our main sources of electricity. Is your utility company offering your family the best rates?

Though wind energy is now more affordable, more available, and pollution-free, it does have some drawbacks. Wind power suffers from the same lack of energy density as direct solar radiation. The fact that it is a "very diffuse source" means that "large numbers of wind generators (and thus large land areas) are required to produce useful amounts of heat or electricity." But wind turbines cannot be erected everywhere simply because many places are not windy enough for suitable power generation. When an appropriate place is found, building and maintaining a wind farm can be costly. It "is a highly capital-intensive technology." If the interest rates charged for manufacturing equipment and constructing a plant are high, then a consumer will have to pay more for that energy. "One study found that if wind plants were financed on the same terms as gas plants, their cost would drop by nearly 40%." Fortunately, the more facilities built, the cheaper wind energy is.

But there is increasing energy being put in finding many other alternative sources of power and making them viable, such as geothermal and wave energy and biomass.

 

 Grid-tied ENERGY Systems
Grid-intertied power systems are for folks who are (or will be) connected to utility company power lines (the "Grid"). They plan to use the Grid to supplement what they are able to make with renewable energy sources like the sun or wind. They are also called gridtie, grid-tie, gridtied, grid-tied, grid intertied, grid-intertied.....! They can be powered by solarPV or wind generators.

Grid-intertied Solar Power Without Batteries. This is the least expensive to buy. It provides you with electricity which is less expensive in the long run. It also increases the amount of energy available through the Grid because electricity in excess of what you use is routed into the Grid. But when the Grid goes down, your house is also without electricity. Look at sample Solar Grid-tie Systems. 

As you will see battery backup can also be incorporated  into a grid-tie system.

 

Off Grid Solar PV Systems

VIELSOLAR has designed a number of autonomous Photovoltaic systems suitable to power continuous 12, 24, 28 and 36 W 12 VDC loads for 12 hrs/day within 4 solar radiation zones in Canada. These systems were sized based on average minimum solar radiation levels in each zone during December, and based on PV arrays being oriented due south inclined at latitude. The period of autonomy selected is 7 days to battery Depth of Discharge (DOD) of approximately 50%. Included are PV arrays, charge controllers, interconnect cable, DC disconnects, lightning arrestors, AGM batteries and pre-wired insulated NEMA 4-12 battery enclosures. Not included are solar module mounting hardware, which can be found in the Solar Module Mounts section.

Photovoltaic potential - Canada

Source: Natural Resources Canada

 

Off-grid SolarEnergy

Off-grid solar power gives people all over the world the electricity to power their homes. In rural America, off-grid solar power makes it possible to buy undeveloped land (with no utility power) very cheaply. You can build an affordable house and live with all the comforts of a city house powered by the utility...without the electric bill!

When the utility company wants to charge an arm and a leg to pull electric lines out to your cabin or rural lot or home Off Grid Power can save you tons of money.

With off grid power you are your own electric company. When the sun shines you store excess electricity in batteries and draw it out later. An off-grid inverter can convert the DC energy from solar panels and batteries into AC electricity which powers normal appliances.

Off-grid = freedom. With freedom comes responsibility— responsibility for understanding your power system and for maintaining it.

Know what country has the most off-grid solar power systems per capita? Kenya! The systems are small—for the most part— but can power a light bulb or two, a radio, and maybe a pump. These simple appliances can transform their lives. With no moving parts, solar panels can last indefinitely with very little loss of power.

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