| 1. Monthly electricity bill payment $150 and more
2. Residential or small business with the peak load less than 50kw, delivery fee is charged based on electricity consumption.
There is a certain fixed cost to install a solar system such as design, engineer, connection and project management no matter the system size, hence, the larger the system, the less average cost per watt, the better return on investment.
Topically, the pay back year is between 7 to 10 years and 40 years ROI is over 15% to 25% depending the system size, the roof orientation, shade, roof angle, location…