Alternative Energy Companies Dallas TX
All Things Solar, Green Home/business Solutions
San Antonio, TX
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Solar Power, Lighting, and Energy Management Systems
Alternative Energy Systems: Size and Cost
You need to decide how much of your energy you want supplied by your solar electric system. If you want to be entirely independent, you will have to buy a large solar PV array. The same goes if you want to provide the bulk of power to your home: a large solar panel array will be needed.
Step 1: Energy usage
Our handy solar calculator will help you determine your needs.
As you calculate, also consider the following factors:
Step 2: Solar energy availability
Determine the number of full sun hours in your area. This varies seasonally, of course, and you can find handy data for your area using a solar insulation map or chart.
Both of these figures will be rendered in watts or watt hours or kilowatt hours (kWh). Divide the figure from step 1 (the number of watt hours) by the figure in step 2 (the number of hours of available sunlight). This will tell you the amount of wattage needed.
Medium sized solar panels have a standard wattage of 50 watts. A large panel (about 10 feet2) will render about 190 watts.
Regardless of how independent you want to be, you should have a certif...