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Specials

What is the difference between a submersible pump and a surface - Friday 24 October, 2014 Viewed:2
There are two main categories of water pumps, submersible and surface mounted. Submersible pumps are installed under the water while surface pumps are mounted out of the water. Submersibles are usually installed below the water level in a well but can be installed in a lake, cistern or river. Surface pumps are usually mounted above the water level which requires a suction lift,the distance between the water level and the inlet of the pump. However if a water storage tank is used the water level could be above the pump creating a positive suction head. In most off grid solar water pumping applications both submersible and surface pumps can be used. the Solar submersible water pump is used to lift water from the well to a holding tank or cistern and then the surface pump can be used to pressurize the water to a house or for irrigation. The cistern provides a storage for days when the sun is not shining or for use during the night. We would recommend that a pressure tank be used in conjunction with the surface pump to avoid excessive cycling on and off of the pump.
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Do I need a water storage tank or cistern?- Friday 24 October, 2014 Viewed:2
Storing water in a cistern or tank has many advantages. It's less expensive and more efficient than storing power in batteries.
Storing water in a cistern or tank has many advantages. It's less expensive and more efficient than storing power in batteries. Since water is always a critical issue, we recommend the tank should be able to store a minimum 3 to 6 days worth of water or whatever you think your needs may be during cloudy weather or in case of a system failure. Generally speaking, animals, plants and humans use less water on cloudy days. Conversely, the sunniest days are when we consume the most water and when the solar modules are providing the pump with the most power.

At the very least a pressure tank should be installed however be aware that most 80 gallon pressure tanks will only provide approx 50 gallons of water back up. the Grundfos SQ flex pumps are the only submersible pumps that can be used in conjunction with a pressure switch. The pressure switch used on the Grundfos SQflex system is a reverse action type. In our house we pump water from our well into a 3000 gallon cistern and then have a Dankoff Surface Pump to pressurize the water in our house in conjunction with a 80 gallon pressure tank.
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Things to consider before buying a Wind Turbine- Friday 24 October, 2014 Viewed:2
Plan ahead before purchasing a Wind Turbine

How to choose a Wind Turbine

Wind is an enormously potent source of clean energy -- for example, according to the U.S. Environmental Protection Agency, the wind resources in the Rocky Mountain and Great Plains regions could potentially meet up to 25 percent of the power needs of those states. Better yet, wind turbines aren't just for farmers -- a home wind energy system can be relatively unobtrusive. If you garden or farm, you can plant right up to the turbine's base. Selecting the right turbine for you will ensure that you have a long-lasting supply of sustainable and low-cost power.

It is important when choosing a wind turbine to make sure that an accurate and certified power curve chart is available that will tell you the power output of the turbine at various wind speeds. A lot of the turbines on the market today are created by back yard businesses that do not have the certifications to back up their claims of power output. the Whisper wind turbines formerly manufactured by Southwest Windpower and now produced by Luminous RE are one of the exceptions.

The Solar Store has had a Whisper 200 wind turbine installed for 7 years and know how well these turbines work both in terms of their reliability and performance.

 

1

Check your local zoning codes to ensure you're allowed to install a wind turbine on your property. Be sure to get a full rundown on height restrictions. If your home is part of a subdivision, make sure you check with your homeowners association to avoid complaints from your neighbors.

2

Conduct an energy audit of your house to determine how much energy you need to produce, as well as where your home may be wasting energy. Add up the watts you use for all your energy needs on a monthly basis. Also, look for air leaks in walls, doors and windows, and consider whether you're over-consuming energy by using brighter light bulbs, an old heating system or a higher thermostat setting than necessary, for instance.

3

Consider how you might reduce your energy consumption by fixing air leaks and addressing other problems so you won't need to produce as much energy. Reducing your consumption may allow you to install a less expensive and smaller wind energy system. Decide what percentage of your energy needs you'd like the tower to supply.

4

Decide where you'll install your turbine and how it will be mounted. Avoid placing the turbine on your rooftop, as the vibrations from the turbines may cause noise as well as structural problems for both the building and the turbine. Determine the typical direction of wind at your location, and locate a spot upwind from buildings and trees to ensure maximum wind flow. Your turbine will also need to be at least 30 feet above any wind barriers sitting within 300 feet, according to the U. S. Department of Energy. These location specifics will help to determine the size of your turbine.

5

Contact a nearby airport, weather station or university to learn the average wind speed in your area, then consider whether wind may slow or speed up in your specific location. Keep in mind that wind speed increases with the height of the tower as well. Then follow the U. S. Department of Energy's formula to determine the performance of a wind turbine: AEO = 0.01328 x D^2 x V^3, where AEO is annual energy output in kilowatts per year, D is the rotor's diameter in feet, and V is average wind speed in miles per hour. Complete this equation for several rotor sizes to determine which may work best or if the wind turbine has a certified power curve then this can be used.

6

Shop smart. The Solar Store will happily calculate how each model would perform in your specific location, as this is a service that reputable dealers provide. As you look at models, also confirm the warranty and testimonials. Ensure that the models you consider are made for producing on-the-grid or off-the-grid energy, whichever you prefer. Also, make sure they come with all necessary component parts, so they'll be ready to install and use.

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FAQS and Information
What is solar water pumping, and why would I need it?- Friday 24 October, 2014 Viewed:2
Plan ahead before purchasing a Wind Turbine
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Should I use batteries in my solar pumping system?- Friday 24 October, 2014 Viewed:2
Plan ahead before purchasing a Wind Turbine
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How does a solar panel power a solar pump?- Friday 24 October, 2014 Viewed:2
Plan ahead before purchasing a Wind Turbine
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