Standing-seam PV Roofing
Sizing & Cost
www.RENEWABLES.com
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Grid-Connected UniSolar® Standing-seam PV Roofing Sizing & Cost |
www.RENEWABLES.com |
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Building Size |
500 sqft cabin |
1,000 sqft home |
1,500 sqft home |
2,000 sqft home |
3,000 sqft home |
5,000 sqft com. bldg |
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Number of people served |
1 |
2 |
3 |
4 |
6 |
10 |
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System Size (1) |
1 kW |
2 kW |
3 kW |
4 kW |
6 kW |
10 kW |
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Sqft. of south facing roof necessary |
250 |
500 |
750 |
1,000 |
1,500 |
2,500 |
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kWh per month produced (aver. CA) |
125 |
250 |
375 |
500 |
750 |
1,250 |
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Retail PV roofing cost (2) |
$6,000 |
$12,000 |
$18,000 |
$24,000 |
$34,500 |
55,000 |
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CA Renewable Energy Rebate (3) |
-$3,000 |
-$6,000 |
-$9,000 |
-$12,000 |
-$18,000 |
-$30,000 |
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US DOE UPVG Teamup Rebate (4) |
-$1,500 |
-$3,000 |
-$4,500 |
-$6,000 |
-$9,000 |
-$15,000 |
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Net cost to customer (5) |
$1,500 |
$3,000 |
$4,500 |
$6,000 |
$7,500 |
$10,000 |
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Net cost per Watt |
$1.50 |
$1.50 |
$1.50 |
$1.50 |
$1.25 |
$1.00 |
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Balance of system cost (6) |
$5,000 |
$6,000 |
$7,500 |
$9,000 |
$12,000 |
$15,000 |
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Total system cost to customer (7) |
$6,000 |
$9,000 |
$12,000 |
$15,000 |
$21,000 |
$25,000 |
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kWh per year produced |
1,500 |
3,000 |
4,500 |
6,000 |
9,000 |
15,000 |
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Yearly Net Metering payback, incl. state and federal tax credits (8) |
$260 |
$520 |
$780 |
$1,040 |
$1,560 |
$5,000 |
| (1) System size in Watts can be roughly figured by doubling the square footage, i.e. 2 x building sqft. = Watts. As a guideline, each person requires an average of 1 kW of PV roofing. A roof sized using the higher number of these formulas will provide approx. 50% of the occupants' needs in an average building and about 100% of the occupants' needs in an energy efficient building. (2) $6/Watt from 0 - 5 kW; $5.75/Watt from 5 - 10 kW; and $5.50/Watt from 10 - 100 kW when purchased through Stephen Heckeroth. (3) AB 1890 established a $54 million rebate program. The program is divided into 5 block grants. The first block grant provides $3 per Watt or 50% of the total system, whichever is less, for grid-connected renewable energy systems. The rebate decreases $.50 per Watt in each successive grant period. Contact California Energy Commission at 800-555-7794 for more information. (4) The UPVG rebate program is funded yearly through manufacturers. Uni-Solar was awarded $150,000 to spend on installations under 10 kW at the rate of $1.50/Watt. Manufacturers choose projects based on how much they will promote their product. This grant is available until 9/30/99. (5) This cost includes the photovoltaic portion of the roofing. There is also a 20% discount on the cost of the non-PV roofing material when PV roofing is purchased, as well as discounts from the rebate programs. (6) A combiner box, charge controller(s), D/C breaker and inverter make up the balance of the components necessary for a grid-connected system. With the addition of batteries (cost not included), the system can also provide emergency power. (7) This represents all material and hardware cost including the roofing in the panel area. There is almost no additional cost for panel installation beyond the normal labor cost for roof installation. The labor cost for installing the balance of the system is not included. (8) AB 1755, the commercial net metering law, allows for a customer's (residential or commercial) meter to run in both directions and the net kWh usage to be measured once a year. This means that a customer is reimbursed for the electricity they produce at the same rate that the utility charges. The net metering law also provides a property tax exemption equal to the total retail cost of the installation. In addition, there is a federal investment tax credit (26 USC Sec. 48) of up to 10% for commercial installations and five-year accelerated depreciation for all solar energy equipment (26 USC Sec. 168).
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Stephen Heckeroth www.RENEWABLES.com Stephen Heckeroth Box 151 Albion, CA 95410 phone/FAX 707-937-0338 |
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