Commercial Retrofit - LED Lighting Efficiency and Solar Power
Retrofit Solar Option: 11,000 sq ft Office Building
LED Effect:
$50,000 investment in LED lighting offsets $ 200.000 in solar system costs, for a net savings of $175,000 on gross solar costs*.
Present Usage : 114,880 kWh
Current Cost Monthly: $ 1724.31
Solar System Required: 76.5 KW
Cost: $ 420,750.00
Usage after LED: 60,203 kWh
LED Portion 16,658 kWH
Balance of system 43,545 kWh
Solar System Required: 35.2 KW **Annual kWh 50,874
Project Cost |
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Solar |
$ 194,040.00 |
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LED |
$ 44,607.20 |
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Total |
$ 238,647.20 |
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Rebate PGE |
$ 40,699.00 |
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Total Net Cost |
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Expected lamp life of LED @ 50,000 hrs is 21 years at projected usage.
Expected Life of solar panels is 25 years plus
* Actual Savings
$ 178,194.60 |
**The remaining annual kWh of 9329 may be reduced via HVAC and other building envelope upgrades totaling 25% increase in electrical efficiency, for a Net Zero Energy profile.
Cost Breakdown |
35 KW |
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Gross Solar Cost |
$ 194,040.00 |
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PGE Rebate |
$ 40,699.00 |
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Sub Total |
$ 153,341.00 |
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Net Solar Cost |
$ 153,341.00 |
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LED Cost |
$ 44,607.20 |
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Total |
$ 197,948.20 |
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Payment Schedule |
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1 |
Deposit |
$ 1,000.00 |
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2 |
CAD Design |
$ 3,880.80 |
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3 |
Permits |
$ 1,000.00 |
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4 |
Materials Solar |
$ 135,828.00 |
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5 |
Materials LED |
$ 37,457.20 |
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6 |
Install LED |
$ 10,555.20 |
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7 |
Install SOLAR |
$ 31,046.40 |
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sub |
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$ 220,767.60 |
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8 |
Final Payment on Activation |
$ 17,879.60 |
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Total Payments |
$ 238,647.20 |
Fluorescent Option 65 KW
Present Usage : 114,880 kWh
Current Cost Monthly: $ 1724.31
Solar System Required: 75.5 KW
Cost: $ 420,750.00
Usage after Fluorescent: 93,931 kWh
Solar System Required: 64.68 KW Annual kWh 93,780
Cost of Solar 65 KW |
$ 357,500.00 |
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Monthly x 60 payments |
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PGE 5 Year PBI |
$ 121,194.00 |
$ 2,019.90 |
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Assumed cost |
$ 236,306.00 |
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Solar Cost |
$ 357,500.00 |
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Fluorescent Cost |
$ 3,600.00 |
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Total |
$ 361,100.00 |
Fluorescent Life |
18000 |
|
hour day |
9 |
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days month |
22 |
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total annual |
2376 |
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years working |
7.5 |