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The fields with the red border are required.
Quantity of Modules for each orientation.
Qty
Module Rating
Watts
Kilowatt rating for orientation
kW Rating
East
-280-
0
250
255
260
265
270
275
280
285
290
295
300
Southeast
0
250
255
260
265
270
275
280
285
290
295
300
South
0
250
255
260
265
270
275
280
285
290
295
300
Southwest
0
250
255
260
265
270
275
280
285
290
295
300
West
0
250
255
260
265
270
275
280
285
290
295
300
Total
Total Kilowatt Rating
Roof Pitch
5 in 12 is a common pitch in SWFL
4
5
6
in 12
Current Electricity Rate per kWh
$
Enter current utility electric rate.
Annual Energy Escalation
Typical escalation rates range from 1.5% to 5%
3.00
1.00
1.25
1.50
1.75
2.00
2.25
2.50
2.75
3.00
3.25
3.50
3.75
4.00
4.25
4.50
4.75
5.00
5.25
5.50
5.75
6.00
6.25
6.50
6.75
7.00
7.25
7.50
%
Annual Degradation Factor
Modules output degrades over time. 0.35% is a good starting point.
%
Annual Maintenance %
Enter estimated annual maintenance costs as a percentage of initial cost. 0.35% is a good starting point.
%
Cost per Rated Watt
$
Enter your total installed cost. National average is around $5.50 with SWFL local costs often much lower.
Initial Cost
This is the initial cash outlay.
Tax Credit
Represents 30% Federal Investment Tax Credit
Net Cost
Total Cost Net of Tax Incentive.
Internal Rate of Return
Based on a series of cash flows over 25 year warranted lifespan.
Compare to Recent 20-Year Treasury Rate
20-Year Treasure Rate 3/18/2015
Lifetime Payback (25 Years)
Total cash payback over 25 years.
Average Annual Estimated Energy Production (Year 1)
Total
East
Southeast
South
Southwest
West
Total
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