| Size | Cost | $/Watt | Annual savings | Payback |
|---|---|---|---|---|
| 5 kW | $13,500 | $2.70/W | $942/yr | 10.0 yrs |
| 6 kW | $16,200 | $2.70/W | $1,130/yr | 10.0 yrs |
| 7 kW | $18,900 | $2.70/W | $1,319/yr | 10.0 yrs |
| 8 kW | $21,600 | $2.70/W | $1,507/yr | 10.0 yrs |
| 9 kW | $24,300 | $2.70/W | $1,696/yr | 10.0 yrs |
| 10 kW | $27,000 | $2.70/W | $1,884/yr | 10.0 yrs |
| 12 kW | $32,400 | $2.70/W | $2,261/yr | 10.0 yrs |
| 14 kW | $37,800 | $2.70/W | $2,638/yr | 10.0 yrs |