Array Sizing
The system sizing method just described is widely used by solar companies and contractors for cost estimates provided to customers over the phone. As you saw, the only data needed for the calculations is the annual usage in kilowatt hours. Most contractors already know the other stuff by heart:
Armed with this data, they calculate a system size in kilowatts. Next, they’ll multiply that by a standard dollars per watt rate they charge for residential jobs, and quote the customer a price.
For instance, if the company charges $5.50 per watt and the system size they calculated is 3K, then the price to do the job would be $5.50 X 2,500 watts, which equals $16,500. (Remember, this is the homeowner’s cost BEFORE the federal tax credit kicks in, along with any other incentives.)
If the estimate is a go, the contractor then visits the home and conducts the site survey. Knowing the length and width of the available array space on the roof or other array site allows him or her to calculate the number of modules that will fit inside that area.
If you think all this is too troublesome, don’t forget that ANGELS SOLAR is willing to help you.
ISO 9001 Quality Management
We are constantly working to improve our work standards and services, and received the ISO 9001 quality management system certification and a number of national product testing. By adopting the standard which derive from JIS C 8955 and AS/NZ 1170 and has passed international standard certification, the product we research and develop can be sold to 200 more countries and regions. As an ISO 9001 Certified Company, we have confident that our products will meet industry standards and exceed customer expectations.
15 Years Warranty
Safety and reliability JIS 8955:2017 or AS/NZS standards with15 years of warranty and 25 years of service life. We guarantee our products to be free from manufacturer defects.
