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Home Solar System
 

Home Solar System

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Three energy solutions for homeowner. I'm excited about photovoltaics as I transition to Solar Energy Technology career and a degree in the ACC Renewable Energy Program. ...

Three energy solutions for homeowner. I'm excited about photovoltaics as I transition to Solar Energy Technology career and a degree in the ACC Renewable Energy Program.
The ACC program is leading in Clean Energy in Austin.
Austin is leading in not only the US but internationally in embracing Renewable Energy solutions.

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  • Cover the entire unshaded roof with PV,
  • Compact fluorescent lamps (CFL) replace incandescent lamps and save over $30 in electricity costs over the CFL's life time
  • Aluminum 6 in. Standoff, L type roof attachment, 100 mph winds, 10.8 wind load
  • Austin Energy is now accepting applications for residential Solar Photovoltaic (PV) Rebates. We will accept applications for commercial Solar PV Rebates starting January 1, 2010. Direct Solar Photovoltaics questions to phone: (512) 482-5346

Home Solar System Home Solar System Presentation Transcript

  • Solar 4 U 1717 Aggie Lane, Austin, TX
  • This Project Addresses Your…
    • Current Home Assessment
      • How much energy you currently use and what you are paying per kWh
      • Opportunity for savings with energy efficiency measures
    • Options for choosing the best PV System to meet your needs
      • Best value
      • Maximum power output
      • Lowest price
    • Estimated Benefits
      • Annual electric bill savings
      • Payback period of your PV system
  • Monthly Use and Charges
    • kWh (kiloWatt hours)
    • Charges
    • Current Use: $623.19/year & 6,410 kWh
  • Energy Efficiency
    • Opportunities to Save
    • Energy Efficiency
      • Energy Star Appliances
      • AC is new and efficient
    • Home Improvements
      • Shading
      • Duct Work
      • Light bulb replacement
  • Applying PV to 1717 Aggie Lane (+) Roof in good condition (-) Large tree on south side of house
  • Roof Orientation 30 0 26.6 0
  • Un-shaded Roof Areas 11:30am December Unshaded Unshaded
    • We will review 3 options for installing PV based on your needs
      • Option 1 (best value)
      • Option 2 (max power)
      • Option 3 (lowest price)
    • All 3 designs will connect to the utility grid
    • All 3 options will result in savings to your monthly electricity bill
    PV System Options
  • Option 1: Best Value 96% solar access in summer months
  • Option 1: Best Value
    • 49 modules X 160 watts = 7840 watts
    • Cost at $5.50/watt = $43,120
    • Cost after 30% federal tax credit = $30,184
    • NW roof; pitch = 30, Azimuth = 330
    • NE roof ;pitch = 26, Azimuth = 59
    • PV Watt yearly output = 7.9 kWh
    • PV Watt yearly energy value = $718
    • PV payback period = 42 years
    • 123% of the annual energy bill
  • Option 2: Maximum Power Rack + Accessories $12,200 Watt (ea.) $1.28 Module (ea.) $435 (Unirac) 0
    • rack mounting for 28 modules
    0
  • Option 2: Maximum Power
    • PV Watt yearly output = 9.3 kWh
    • PV Watt yearly energy value = $885
    • PV payback period =43.75 years
    • 145% of the annual energy bill
    • 49 modules X 160 watts = 7840 watts
    • Cost at $5.50/watt = $55,320
    • Cost after 30% federal tax credit = $38,724
    • NW roof pitch = 15, Azimuth = 149
    • NE roof pitch = 26, Azimuth = 59
  • Option 3: Lowest Price Focusing on the un-shaded areas
  • Option 3: Lowest Price
    • 33 modules X 160 watts = 5280 watts
    • Cost at $5.50/watt = $29,000
    • Cost after 30% federal tax credit = $20,300
    • NW roof pitch = 30, Azimuth = 330
    • NE roof pitch = 26, Azimuth = 59
    • PV Watt yearly output = 5.2 kWh
    • PV Watt yearly energy value = $494
    • PV payback period = 41 years
    • 81% of the annual energy bill
    • Installing PV can lead to significant savings on your annual electricity bill
        • Option 1 (best value) $718/year
        • Option 2 (maximum power) $885/year
        • Option 3 (lowest price) $494/year
    • With rates forecasted to increase, savings may be even greater!
    Your Estimated Savings Typical homeowner use
  • Summary & Recommendations
      • All options are viable choices depending on your needs
      • Regardless of option chosen, recommend you wait for:
        • Austin Energy rebate program re-instatement
        • PV module prices to come down
    Option 1 (best value) Option 2 (max power) Option 3 (lowest price) Cost $30,200 $38,700 $20,300 Payback period 42 years 43.75 years 41 years Percent of bill 123% 145% 81% Benefits
    • No racking system
    • Achieving great energy output with moderate investment
      • 9.3kWh provided will not only cover your electricity costs, but also make you money as electricity costs increase
    • Achieve “green” and savings at minimal cost
    • No shading
    Considerations
      • Shading will reduce power output in winter months
      • Racking system requires slightly greater attention
      • Over time, savings will be less significant than in Options 1 and 2
  • BACK-UP
  • Austin Energy Rebate Program
  • Array Orientation
  • Typical PV Benefits Summary