A customer has a usable roof space that is 15’ X 28’ and they use 12,000 kWh per year. If that local installer charges $2.98/watt and uses high efficiency modules that produce 16 W/ft2, what is the largest system size this customer can fit on their roof?

Select one:
4.0 kW

6.72 kW

1.25 kW

5.23 kW