Solar 101 Austin Energy Commercial Customers
Upcoming SlideShare
Loading in...5
×
 

Solar 101 Austin Energy Commercial Customers

on

  • 1,356 views

 

Statistics

Views

Total Views
1,356
Views on SlideShare
1,355
Embed Views
1

Actions

Likes
0
Downloads
29
Comments
0

1 Embed 1

http://www.slideshare.net 1

Accessibility

Categories

Upload Details

Uploaded via as Adobe PDF

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Solar 101 Austin Energy Commercial Customers Solar 101 Austin Energy Commercial Customers Presentation Transcript

  • Texas Solar Power Company p y Austin, Texas
  • Solar Power 101 Why use Solar How electricity is generated How energy is used ow e e gy s Types of solar systems What it costs Q&A
  • Why Solar? y You & your company care about the future – want to be good environmental stewards Sources of fossil fuel are S f f il f l finite You want to lock in your operational costs You want a reliable, maintenance- maintenance-free system You want to “grow y g your own” energy and…. View slide
  • Solar Energy is the most abundant renewable energy in the world. Photo = Light Voltaic = Electricity View slide
  • Thomas Edison to Henry Ford, 1931: y , “I’d put my money on the sun and solar energy. What a source of power! I hope we don’t have to wait until oil and coal run out before d l b f we tackle that.”
  • Some Interesting Stats Stats… Average commercial system = taking 4 - 5 cars off the road (reduction of greenhouse gas emissions) The earth receives more energy from the sun in just one hour than the world uses in a whole year.
  • Solar Systems work well No moving p g parts No emissions No water required (except, perhaps, periodic cleaning) ) Grid- Grid-tie systems are easily managed – putting power * Some assembly required! directly on the grid. Batteries not included.
  • Austin is a great p g place for Solar!
  • What are Solar Cells? Thin wafers of silicon Similar to computer chips Much bigger gg Much cheaper! Silicon is abundant (sand) Non- Non-toxic, safe
  • PHYSICS: How to Make Electricity Silicone absorbs white sunlight Causes electrons i atoms to collide C l t in t t llid with each other Activity creates + and - charges Charges collect on to positive and negative solders that lead to conducts
  • What are Solar Modules? Modules or panels are made up of o es o pa e s a e a e p o multiple cells Two kinds of PV modules Monocrystalline = whole wafers Polycrystalline = composite wafers
  • What are Solar Arrays? y PV or Solar Arrays are made of a series of connected modules.
  • 3B i S Basic Systems: 1. Grid- Grid-Tie 2. Grid- Grid-Tie / Battery Back-Up Back- 3. Stand Alone or Off-Grid Off-
  • Grid – Tie Systems: Feed power into the main load center Customers continue to receive power from the grid, but push any excess power produced by the PV system onto the grid “Net Metering” monitors the flow of power both to and from the utility grid
  • Net Metering: Electric meter can run both forwards and backwards Required of all electricity providers If you come out ahead, the energy company is not required to pay you at certain rate Austin Energy pays wholesale rate
  • Grid –Tie Battery Back-Up: Tie, Back- In case of grid failure, system failure provides uninterrupted power to specified loads Battery bank is designed to meet user’s load objective in terms of Amps Run Time
  • Grid –Tie Battery Back-Up: Tie, Back- Additional components used by this system Grid- Grid-tie Battery back-up Inverter back- Charge Controllers Batteries Inverters have both outputs and inputs OUTPUTS are from Batteries or PV array INPUTS are from the load center (grid) Charge batteries Monitor voltage
  • Example of Battery Bank with 14 hours of reserve power (residential).
  • Stand Alone or Off - Grid Designed to meet all power needs Necessary when location is not served by power company Design constraints D i t i t Surge amps Battery b k amp hour capacity B tt bank h it Days of back-up storage (poor sunlight) back- Square footage for components We use a lot of electricity!
  • Majority of Installations: Grid-Tie Grid-
  • Ideal Location for a Solar Install South facing roof Tilted to location s location’s latitude Austin = 30.27 = to a 7 / 12 pitch Shade- Shade-free area,, every day of the year
  • Ideal Location for a Solar Install We can provide the tilt…
  • Components of a Solar Installation PV Modules produces Direct p Current (DC) We use Alternating Current (AC) Power must be converted from DC to AC with an Inverter
  • A Residential Grid – Tie System Service Panel P l Inverter PV Meter DC AC
  • A Commercial Grid – Tie System AC Gutterbox PV Disconnect Meter Inverter Combiner DC box b Disconnects
  • PV ARRAY
  • How Much Power Can You Produce? Austin Energy offers a fabulous rebate p g program: $3.75 p watt per A 23.6 kilowatt system “maxes out” their per- per- year allotment for commercial installation One rebate per y p year, p system ( , per y (i.e. p meter) per ) The following calculations are based on a 23.6 kW system 23 6 t
  • How Much Power Can You Produce? System SIZE: 23.6 kW = 23,600 Watts Production per HOUR: System will produce 23,600 watts 23 600 per hour
  • How Much Power Can You Produce? Production per DAY: Austin averages 5.4 good sun hours per day, so 23,600 watts x 5.4 hours = 127,440 watt hours per day Production per MONTH: 127,440 watt hours per day x 30.5 days per month = 3,886,920 watt hours per month, or 3,887 kWh/mo. 3 887 kWh/mo
  • How Much Power Can You Produce? One more factor…. The DC power produced from the system must be converted to AC power This process looses power, so “derating “derating factor” of .77 must be calculated 3,886 kWh/month x .77 = 2,992 kWh/month , , On average this system will generate average, ~ 3,000 kWh per month
  • Austin Energy Bill – Example Customer Average Monthly Usage: Energy = 23,590 kW hours Demand = 52 kW Ave. Bill = $1,865.65 month
  • Yearly Austin Energy Charges $8,380.00 $14,007.79 Energy Charge Demand Charge
  • PV for Example Customer 23.6 23 6 kW system = 135 panels
  • PV for Example Customer 23.6 23 6 kW system = 135 panels At 175 Watts each
  • PV for Example Customer 23.6 23 6 kW system = 135 panels At 175 Watts each Power Output 18,191 Watts AC
  • PV for Example Customer 23.6 23 6 kW system = 135 panels At 175 Watts each Power Output 18,191 Watts AC Producing 32,154 kWh per year
  • Eco Equivalent: 43,852 Miles = 5 fewer cars on the road 856 trees Yearly electricity use of 4 Austin homes
  • Cost Analysis DEBIT CREDIT PV System Cost $166k Austin Energy Rebate $85K Customer's Out-of-Pocket $81K Federal Income Tax Credit $50K Cost $31K Subsidized 81%
  • Equipment Depreciation 7 Year Schedule Year Amount 1 $ 69,364 50% Bonus in 2 $ 11,010 year 1 3 $ 9,437 4 $ 8,089 Example based p 5 $ 13,266 on 50% tax 6 $ 13,266 bracket 7 $ 13,266
  • B Bottom Li Line Yearly energy savings ~ $3,400 At year 25 energy savings value is projected to be ~ $8,700 $8,700 Payback period in ~2 years 2 Accumulated savings over 25 years is ~ $164K $164K Average ROR over 25 years 9%
  • Other Financial Considerations After the initial purchase, cost of your power is free. Panels are warranted for 25 i f P l df years, but typically have up to a 40-year lifespan. lifespan Solar reduces the peak load on your demand (kW) meter. t Solar helps lock in operational costs and hedge against rising energy costs. As the price of energy goes up, savings increase exponentially. exponentially
  • Opportunity Costs If you had invested your $54,000 in…. y y $ , Money Market A Accounts Chase Bank 2.0% Wells Fargo 1.76% University Federal Credit Union 3 1% U i it F d l C dit U i 3.1%
  • Opportunity Costs If you had invested your $54,000 in…. y y $ , Mutual Funds* * Vanguard Institutional Index 2.21% Fidelity Diversified International 1.22% Fidelity M Fid lit Magellan .39% ll 39% *You would have lost on average 7% of your capital
  • Opportunity Costs If you had invested your $54,000 in…. y y $ , CD’s C ’ 3 month 3.13% 1 Year 3.62% 3Y Year 3 88% 3.88%
  • Opportunity Costs If you had invested your $54,000 in…. y y $ , T Bills 3 Month T Bill 1.85 6 Month T Bill 2.04 1 Year T Note 2.22 Federal Funds 2 Year Note 2.54 5 Year Note 3.26 10 Year Note 4.00 30 Year Note 4.61
  • Many variations…
  • Many variations…
  • Many variations…
  • Many variations…
  • Many variations…
  • Many variations…
  • Many variations…
  • Many variations…
  • Many variations…
  • Questions? 1703 W. Koenig Lane Austin, TX 78756 512-459- 512-459-9494 www.txspc.com
  • Texas Solar Power Company p y Austin, Texas