How To...          


 Call Us: 1-866-538-6583  


How to calculate the wind speed in your area:   


The Following Tool Can Be Used To Determine Your Mean Wind Speed And Energy.


Follow these steps to get your local annual wind speed:

1) Click wind atlas link below.

2) Select mean wind speed.

3) Select 30M for height.

4) Select Annual (for annual average wind speed)

5) Click on map to select your province.

6) When the new page loads, enter your postal code in the related box.

7) Click the submit button.

8) A pop-up window will appear displaying a chart. Find your results displayed in upper left area of chart in the box under mean wind speed and next to where  it says annual.


This tool can be found at the Canadian Wind Atlas website. (Click on link below)

  Canadian Wind Atlas Website (Click here)





Wind speed is a critical element for the success of a wind generation project.

The power and energy output increases dramatically as the wind speed increases.

An annual average wind speed greater than 4 metres per second (m/s) is required for small turbines.

Utility scale wind power plants require minimum average wind speeds of 6 m/s.

Overview of the Numerical Simulations on Canadian Territory














Display Field
Mean Wind Speed
Mean Wind Energy
Roughness Length
Land/Water Mask










United States Wind Resource Maps (Click here)

     United States Wind Map Diagram (Below)


This map shows the wind resource in the United States.   Land is categorized by wind power class (left column of key), defined by a range of annual average wind speeds measured at 10 meters (33 feet) and 50 meters (164 feet).   The columns called Wind Power estimate how much potential energy from the wind (in watts) is available per square meter of land, assuming wind turbine hub height of 10 or 50 meters.   (Of course, to calculate Wind Power, assumptions about turbine size and performance were made.) Wind turbines are economical in wind power class 4–7.



















Get Monthly Output Power (kWh/Month) For a Wind Turbine Based on Rotor Diameter (m):

Wind Turbine Power Output Calculator



Turbine Annual Energy Output 

Scientific Equation:

KWH = 0.01328 x Rotor diameter (in feet)2 squared x average wind speed (mph)3 cubed


Eg; 5 KW Wind Turbine w/ 6.4 M rotor (19.2 feet)

Average wind speed of 6 m/s = 13.5 mph




Rotor Length Squared: 19.2 x 19.2 = 368.64


Average Wind Speed Cubed: 13.5 x 13.5 x 13.5 = 2460.375


Final Calculation:

0.01328 x 368.64 (rotor length in feet/squared) = 4.8955392

4.8955392 x 2460.375 ( wind speed in mph/cubed) = 12,045 KWH Annually


*Tip to calculate m/s to mph for wind speed: 1 m/s = 3.6 KM/H = 2.25 mph



What is the Photovoltaic potential in your area? 

Natural Resources Canada


Photovoltaic potential (kWh/kW) South-facing, tilt=latitude Annual



















US Photovoltaic Potential:






Obtain performance estimates for grid-connected PV systems.

The PV Watt Photovoltaic Solar System Performance Calculator


Sizing A PV Array:

1. Determine what your KWh electric consumption is. Then match PV production to your electric consumption.
For example, if you consume 600 kilowatt-hours per month (KWh/month) and want to produce 100% of your
electricity with a PV system with no battery backup. Do this equation to calculate; 600 KWh/month x 12
months equals 7,200 KWh/year or approximately 20 KWh/day.

Most of the U.S. has 3.5 to 5 Sun Hours of solar input. This means that a 1 kilowatt AC PV system in a 4.5 Sun Hour region will produce 4.5 kilowatt-hours per day. 20 kWh/day divided by 4.5 sun hours equals 4.4 KW AC.

Go to "PVWATTS" at:

and enter your location, 4.4 KW, your roof tilt and orientation. See your monthly and annual estimated PV production for a 4.4 KW system or any other size system.
2. Match your PV array size to your roof space. You need full sun on your solar array all day (from at least 9am to 4pm). Trees, chimneys, vents and other buildings can block the sun or make array installation difficult. Square footage examples; 225 sq. ft. array (Qty of 32 - 70 Watt modules) / 140 sq. ft. array (Qty of 20 - 75 Watt modules).

3. Match your PV system cost to your budget. PV modules are about half of the total system cost. The other equipment you may need depending on your system configuration are mounting hardware, combiner boxes, disconnect switches, power center, charge controller, inverter, battery bank and wiring.

*Find out what State / Provincial or Federal Government incentives are available in your area.



Question: If I need 5KW for my house, do I choose a 5KW wind turbine?


Answer: You'll need to check the mean wind speed of your area. The tower height, terrain and location of the wind turbine will also dramatically affect the yield of the wind turbine.

If the wind speed for your area is more than 3m/s or 10.8km/h or 6.75mph for more than 3000 hours annually...

Congratulations!... You can enjoy the savings to use our wind turbines.

If not and you have enough sunshine in your area, then our Solar Panels may be a more suitable alternative for you.

The actual yield of the wind turbine depends on the wind speed in your area. If you have a mean wind speed bigger than 10m/s, you'll get the full benefit from the wind turbine. If you have a mean wind speed of 7m/s, you'll get roughly a 75% benefit from the wind turbine. Eg; 5000 Watt turbine:  75% benefit = 3750 Watts generated from the turbine. 

*You can also choose a bigger wind turbine according to your budget. If you have a mean wind speed of less than 2m/s, a wind turbine may not be your best choice. You may consider solar power as a more suitable option. 

You can  also combine solar power with your wind turbine to fully meet the needs of your electricity consumption.
Question: How do you convert m/s to KM/H or MPH?
Answer: 1m/s = 3.6 KM/H = 2.25 MPH
Question: What if I can use both wind turbines and solar power in my area?

Answer: Because solar panels are more expensive than wind turbines, you should try to use as much wind power as


For a wind speed less than 4m/s (14.5km/h or 9mph)
>>> Use 90% solar and 10% wind.
For a wind speed more than 4m/s (14.5km/h or 9mph) but less than 5.36m/s (19.3km/h or 12mph)
>>> Use 50% solar and 50% wind.
For a wind speed more than 5.36m/s (19.3km/h or 12mph)
>>> Use 30% solar and 70% wind.


How many batteries do I need for my wind turbine?

The batteries you need depends on the hours that need to be used per day, let's assume that...


  • Your usage is 6 hours per day, 

  • The capacity of the wind turbine is 5000 Watts 

  • The DC output voltage for the controller is 240V DC

The unit battery capacity will be: 5000W x 6H x 1.67 / 240V = 208.75 AH or bigger. ( 1.67 is the factor we use for the calculation)

If you use 300 AH 12V batteries, you'll need 240V/12V = 20 units



How to Approximate the Wind Pressure:

 Pressure = ?x (density of air) x (wind speed)2 x (shape factor)

  • The density of air is about 1.25 kg/m3.

  • The shape factor (drag coefficient) depends on the shape of the body. It has order of magnitude 1 and is dimension less.

  • The wind speed must be expressed in m/s. In that case the pressure has units kg/m/s2, i.e. N/m2.


See this table:



Wind speed (m/s)

Wind pressure (N/m2)


Lower limit

Upper limit

Upper limit




















































> 660



How To Convert Gigawatts - Megawatts - Kilowatts - Watts:

Gigawatts, Megawatts, Kilowatts & Watts:


Electricity is measured in units of power called watts. The watt was named to honor James Watt, the inventor of the steam engine. One watt is a very small amount of power. It describes the rate at which electricity is being used at a specific moment. A kilowatt (kW) represents 1,000 watts. The amount of electricity a customer uses over a period of time is measured in kilowatt-hours (kWh). Kilowatt-hours are what you see on your electricity bill at home.


For example, if you use a 60-watt bulb, 4 hours a day for 30 days, you have used 7.2 kW of electrical energy.


Sample Calculation: (60 watts) X (4 hours/day) X (30days) = 7200 watt-hours

7200 watt-hours/(1000 watts/kW) = 7.2 kW

Megawatts and Gigawatts - metric terms used to measure the output of a power plant or the amount of electricity required by an entire city.

1 megawatt (MW) = 1,000 kilowatts (kW) = 1,000,000 watts (1 million)  

1 gigawatt (GW) = 1,000 megawatts (MW) = 1,000,000,000 watts (1 billion)



How to convert Horse power to Watt or Kw or J/s?


1 hp=746 W
1000 W=1 kW
60 min = 1 hr
60 s = 1 min
1 W = 1 J/s


Q. How can I pay for my system faster for my Home?

You can apply for a business number and calculate your earnings from you system to use for taxible income then you can write off over 3 years the whole system

towards all you taxes paid. This works best for the person that works a regular job and has with held taxes.

Q. If I lease my equipment can I write off the whole amount of the payments?

Yes, If you apply for a business number you can Lease your equipment and have the payment be 100% deductible on your income tax. At the end of the term the leasing company will sell you your system back for $1. This way you can the whole system interest and all paid for with your with held tax.

        Here is what some of our customers say about us!


  • 10 out of 10 - Reg T Off Grid Solar system 2015 MB
    "They always deliver for me....great service and loads of technical back up knowledge.."
  • 10 out of 10 - Janine G Off Grid Solar system 2015 MB
    "Great products, patient with my tech issues around payments, ease of payments on line…"
  • 9 out of 10 - digitech … Solar Parks lights 2015 AB
    "Nobody is perfect."
  • 10 out of 10 - Phil G Off Grid Solar system 2015 ONT
    "Good product good service good price"
  • 10 out of 10 - Don O Off Grid solar system repair and LED lights 2015 MB
    "Good service"
  • 10 out of 10 - Jason H Commercial solar system 2015 AB
    "A little hard to get a hold of sometimes. Other than that great company that always goes…"
  • 10 out of 10 - David T LED light and Solar system 2015 MB
    "Personalized service, quality products and local availability."
  • 10 out of 10 - Reg T  Off Grid Solar system 2015 MB
    "Very knowledgeable...helpful..​.goes out of her way to accommodate sales even on Saturday."
  • 10 out of 10 - Don G Off Grid Solar system 2015 MB
    "Very prompt, knowledgeable, and friendly attitude."
  • 10 out of 10 - Kim A Grid Tie Solar system  2014 MB
    "On time, flexible and very good customer service. Would (and have) told others about…"
  • 10 out of 10 - Brenda Solar Park lights 2014 ONT
    "very convenient"
  • 10 out of 10 - Gwen P Commercial Repairable LED 2014 MB
    "About ten years ago we started looking for brighter lights to use especially in winter…"
  • 10 out of 10 - Manitoba… Commercial repairable LED
    "good service, good products, fair pricing" MB 2014
  • 10 out of 10 - Dan M On Grid Solar system 2014 MB
    "has proven track record, very clear on setting expectations of project.…"
  • 10 out of 10 - Jack W Off Grid solar system 2014 MB
    "Very very helpful"

Like us on Facebook   Follow us on Twitter   View our profile on LinkedIn  

Head Office:     Evolve Green - 53 Main St - Marchand, MB  Canada  R0A 0Z0

© Copyright 2008-2016 Evolve Green. All rights reserved.