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How much can I save with clean solar power?

What size system do I need? How much could I save? In California, the average residential customer uses 6,500 kilowatt-hours (kWh) of electricity per year (California Energy Commission). Depending on geographic location, energy consumption and other installation factors, the typical California home will require a 2 to 6 kWh system. The following table provides simple estimates of solar panel system costs, sizes and savings.

 

Simple Solar Panel System Cost & Savings Table
           
Current Utility Costs          
Monthly Utility Bill

$200

$400

$600

$800

$1,000

Annual Cost

$2,400

$4,800

$7,200

$9,600

$12,000

30 Year Cost*

$74,880

$149,760

$224,640

$299,520

$374,400

 

 

 

 

 

 
System Cost          
kW Output Desired

1.5

3.0

4.5

6.0

8.0
Installed Cost

$17,500

$30,000

$45,000

$60,000

$80,000

Less: CA Rebate

$3,750

$7,500

$11,250

$15,000

$20,000

Less: Federal Credit

$2,000

$2,000

$2,000

$2,000

$2,000

Total System Cost

$11,750

$20,500

$31,750

$43,000

$58,000

 

 

 

 

 

 
New Utility Costs          
Monthly Utility Bill

$70

$140

$210

$280

$350

Annual Cost

$840

$1,680

$2,520

$3,360

$4,200

30 Year Cost*

$26,208

$52,416

$78,624

$104,832

$131,040

 

 

 

 

 

 
Utility Savings          
Monthly

$130

$260

$390

$520

$650

Annual

$1,560

$3,120

$4,680

$6,240

$7,800

30 Year Savings
(less system cost)

$36,922

$76,844

$114,266

$151,688

$185,360

 

 

 

 

 

 
System Breakeven Years

7.53

6.57

6.78

6.89

7.44
Home Value Appreciation

$17,500

$30,000

$45,000

$60,000

$80,000

Please note: These are estimates only. There are many factors which may affect costs and savings. *30 year cost includes 4% annual Rate inflation.

Only a qualified installation professional can provide you with an accurate estimate for your home. Click Here to receive customized quotes from local professionals.

The rated output of solar panel modules is assessed using the full hours of sunshine per day where one full sun hour is defined as being exposed to a solar intensity equal to 1,000 watts per square meter. Full sun hours do not indicate the number of hours that the sun is shining in a day, but rather is an indication of the intensity of the sun. Also important to note is that not all of the sunshine that strikes a solar panel cell will be converted into electricity. Typically, 15% to 25% of the energy produced is lost because of inverter and wire losses.

 
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