Described in greater detail under Wind Resource Assessment, the Wind Resource Characteristics define the Energy you can extract from the wind this is a specific question related directly to your specific wind site.
In our example, we find the average Wind Speed is 12 mph (See Wind Resource Assessment for links). Using the manufacturers Energy Output chart we can see that we would expect, on average, 1200 Kwh/Month Energy production.
HINT: Under most Net-Metering laws you only receive retail rate for your electricity up to the amount you consume. Overage is typically not covered, and Utilities will only pay avoided costs. 2 cents per kWh.
We choose a Wind Energy Conversion System (WECS) to provide enough energy to maximize the Full Retail Rate we can earn by exporting Wind Energy back into the Grid. Size your Net-Metering Wing Generator to produce just under your actual consumption.
Many Net-Metering policies allow you to bank overage the extra energy you generate that exceeds your consumption and apply them to a future month. Usually these KWH credits must be used within One Year of their generation.
This is a great advantage for Net-Metering Wind Projects and allows you to size the Wind Generators closer to your actual Electrical KWH consumption.
Grid-Tie with Battery Back-up
Small Wind Generators can also be configured to Interconnect with the Grid, and take advantage of a Battery Bank. These Grid-Tied with Stand-Alone capabilities use inverters that act as an Energy Management System.
This inverter senses the Load and uses incoming Wind Energy to power the load. If the Wind is not enough to power the load then the system will also draw from the Battery Bank.
If this is not enough, then the Energy Management System will draw from the grid to power the load, and recharge the batteries.
Conversely, when Wind Power exceeds the Load, and the batteries are charged, then Wind Energy can be exported through the grid-connection back to the grid.
Companies such as Xantrex, and Outback produce Inverters and Controllers that interface with Grid to act as both Net-Metering Systems (see specific hardware in the Glossary), and keep Emergency Batteries fully charged and ready for a Grid-Disconnect event. These systems function like Un-interruptible.
Power Supply (UPS) for your load (Home or Business.) To size these systems define the project in terms of maximum Power draw (everything turned on), and Energy demand for a month.