What's the First thing that comes to your mind when you hear the word "off-grid" and "on-grid" ?
Pardon, What does it mean to be off grid? What is difference between on grid and off grid?
Let me clarify something for you. 👇👇
What is On grid ?
A home that is connected to locally provided power source is considered “On-grid”.
An on-grid can be practical if the following conditions exist:
You live in an area with an average annual wind speed at least 10 mph (4.5m/s). Utility-supplied electricity is expensive in your residential area. The utility’s requirement for connecting your system to its grid are not prohibitively expensive.
Photo credit: taiwantrade
What is off grid?
Systems are not connected to a local utility supplier are known as “off-grid”.
An off-grid can be practical if the following conditions exist:
You live in an area with an average annual wind speed at least 9 mph (4m/s).
A grid connection is not available or expensive. You would like to gain energy independence from the utility.
Do you know a blade cover with 5 mm of ice can reduce power curve by as much as 80%?
Do you know icing is a major problem for aircraft, wind turbine and power lines?
Do you know why people choose to set up their wind turbine in this cold region?
Rather than waiting for the ice on the blades to be removed by direct sunlight or higher temperature, we have to find some active methods to protect our expensive wind turbine.
The problems occurs for wind turbine operating in cold region.
✔ Accumulation of ice on wind turbine blades resulting in reduced power output and increased rotor loads
✔ Mechanical and electrical failures due to higher load on blades
✔ Limited or reduced access for maintenance activities
✔ Measurement and control error and other safety hazard
Actually, there are a variety of different approaches to remove ice from blades. IEA wind recommends heating outer surfaces of blades or using Atifreeze coating.
Furthermore, there are various ice protection system technologies available on market.
✔ Hot air ice protection systems have a heat source combined with a high powered fan to circulate hot air to different areas of the blade.
✔ Electro-thermal ice protection systems have heating elements, typically carbon fibre, placed on the outer surface on the blade
✔ Microwave ice protection systems have a special outer coating on the blade surface that heats up when exposed to microwaves created by generators inside the blade
✔ Passive systems use blade coatings with special material properties to passively (no energy required) mitigate ice induced risks
The cold regions tend to have low population density and high wind speed which make them particularly attractive sites for setting up a home wind turbine.
Credit: windpowermonthly, IEA wind
Finding your best location for your wind system
Locate your wind turbine in windy sites so as not to disturb neighbors and animals around. The better location of your turbine requires avoiding personnel or animal activities within a 33 ft (10m) radius, and human habitation and wildlife within 66 ft (20m) radius.
Purchasing a pole kit from your local hardware outlet
The minimum recommended tower height for Automaxx windmill turbine is 22 ft(7m) to 33 ft(10m).
There are three types of Automaxx windmill pole kits.
Choosing your wind turbine battery
The capacity of your battery bank is determined by your use. Battery price might be your first concern. Nowadays, there are multiple battery options on market. e.g. Flooded Lead Acid, Lithium Ion, and Deep Cycle Battery. In general, we will recommend our customers using Deep cycle battery.
For further information, you could visit Battery Council to get to know more about battery.
The amount of wind at your site
If you live in the U.S., you can estimate the wind source in your area by referring to the wind resource maps provided by the U.S. Department of Energy's Wind Powering America Program.
The zoning requirements and covenants in your area
You can find out about the zoning restrictions in your area by contacting the local building inspector, board of supervisors, and/or planning board.
Estimating appliance and home electronic energy use
Knowing your electricity usage is a must before installing a wind turbine.
Following steps below.
1. Find wattage of the product
2. Estimate of time used
3. Find the daily energy consumption by using this formula
(Wattage × Hours Used Per Day) ÷ 1000 = Daily Kilowatt-hour (kWh) consumption
4. Find the annual energy consumption by using this formula
Daily kWh consumption × number of days used per year = annual energy consumption
5. Find the annual cost to run the appliance by using this formula
Annual energy consumption × utility rate per kWh = annual cost to run appliance
Credit: Department of Energy