solar for your home and business
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Solar for your Home and Business
Earth Wind and Fire Energy SummitAddison Texas
October 4, 2014
Steve Wiese, Clean Energy Associates and Longhorn Solar for the Earth Wind and Fire Energy Summit, October 4, 2014
• Independent consulting firm specializing in renewable energy, particularly distributed generation
• Services
• Clients
• Renewable energy programs• Education and training• Project development• Technical and market analysis• Advocacy
• End-use energy consumers, Engineering and construction firms, Clean energy project developers, Utilities, Government agencies, and Regulators
Clean Energy Associates
3
• Top distributed solar installer in Texas with offices in DFW+Austin+San Antonio
• Successful contractor for recent Solarize Garland project
• Goal: To be the be the best installer of the best solar equipment at the best prices for the best customers in Texas
Our Recent Growth:2009 – 32 kW 2010 – 104 kW 2011 – 242 kW 2012 – 1134 kW 2013 – 1676 kW 2014 – 2024 kW YTD
Steve Wiese, Clean Energy Associates and Longhorn Solar for the Earth Wind and Fire Energy Summit, October 4, 2014
How Solar Integrates with a Home or Business
Steve Wiese, Clean Energy Associates and Longhorn Solar for the Earth Wind and Fire Energy Summit, October 4, 2014
Solar Panel Technologies
Steve Wiese, Clean Energy Associates and Longhorn Solar for the Earth Wind and Fire Energy Summit, October 4, 2014
Types of Solar Cells• Crystalline Silicon (~88% of worldwide market)
– Poly (~60%)– Mono (~18%)
• Thin Film (~10%)– Cadmium Telluride (Cd-Te, ~5%)– Copper Indium Gallium Diselenide (CIGS ~2%)
• Multi-junction, Nanocrystal, Organic, Plastic, Polymer, Quantum Dot, etc. (~2%)
Advice• Don’t get too caught up in
the latest developments and industry press
• Best selling technology is so because it’s bullet proof
• Longest warranties of any product (25 years) means you should look to strong companies with proven track records
• And for good values
• Stand-Alone or String Inverter• Benefits – access, simplicity, strong track record, low cost• Drawbacks – slightly less efficient under certain circumstances, less granular performance data
• Microinverters and AC Modules• Benefits – slightly more efficient
under certain circumstances, highly granular performance data
• Drawbacks – access, higher cost, finicky data integration
• DC Optimizers• Benefits – slightly
more efficient under certain circumstances, highly granular performance data
• Drawbacks – access, higher cost, finicky data integration
Common Inverter Technologies
Steve Wiese, Clean Energy Associates and Longhorn Solar for the Earth Wind and Fire Energy Summit, October 4, 2014
Advice• Don’t get too caught up
in the latest developments and industry press
• Best selling technology is so because it’s bullet proof
Using Solar Energy
Steve Wiese, Clean Energy Associates and Longhorn Solar for the Earth Wind and Fire Energy Summit, October 4, 2014
• Solar electricity feeds to home on your side of the utility electric meter• It flows to wherever it’s needed – lights, appliances, etc.• Utility-provided electricity will supplement to match your needs• If you’re generating more than you’re using, energy flows back to the utility
Advice• Use it any way you like• Be aware of contractual
relationships regarding “green” or renewable energy credits
Steve Wiese, Clean Energy Associates and Longhorn Solar for the Earth Wind and Fire Energy Summit, October 4, 2014
Inflow-Outflow Metering (competitive market, most common in DFW area)
• Wires company meters inflows and outflows separately, passes data to retailers for billing
• Retailers have no obligation to purchase or credit customer for outflows
• Green Mountain Energy, TXU, and Reliant, and have buyback offers for residential customers
• http://www.powertochoose.org/en-us/Content/Resource/Selling-Renewable-Power
Net Metering (many coops and munis)• Value (full retail, wholesale energy), rollover policiesValue of Solar (Austin only, so far), FiT or PPA (someday)• VOS: Utility charges you for all your consumption, regardless of
whether it came from your solar or their wires; utility then credits you for all solar production, regardless of whether you used it in your home or exported it as excess energy to the grid
• FiT/PPA: Utility contracts directly with customer for solar production
Realizing Value for Solar Energy
Steve Wiese, Clean Energy Associates and Longhorn Solar for the Earth Wind and Fire Energy Summit, October 4, 2014
The US Solar Market is Growing Rapidly…
…and Growth is Becoming More Widespread
Solar Prices are Declining…
U.S.
…and areRelatively
Lowin Texas
Texas
Steve Wiese, Clean Energy Associates and Longhorn Solar for the Earth Wind and Fire Energy Summit, October 4, 2014
Steve Wiese, Clean Energy Associates and Longhorn Solar for the Earth Wind and Fire Energy Summit, October 4, 2014
Grid Parity…
At $3.22/w-dc with no incentives
http://www.ilsr.org/projects/solarparitymap/
Steve Wiese, Clean Energy Associates and Longhorn Solar for the Earth Wind and Fire Energy Summit, October 4, 2014
Grid Parity…
At $3.22/w-dc with 30% Federal ITC
http://www.ilsr.org/projects/solarparitymap/
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cTexas Investor-Owned Utility Solar Incentive Levels
AE ResOncor Res Oncor CommEntergy Res Entergy CommTNMP Res TNMP CommAEP-TCC Res AEP-TCC CommAEP-TNC Res AEP-TNC CommSWEPCO Res SWEPCO CommEPE Res EPE Comm
Solar Incentives are Declining…
U.S.
Texas
Steve Wiese, Clean Energy Associates and Longhorn Solar for the Earth Wind and Fire Energy Summit, October 4, 2014
30% Federal ITC expires at the end of 2016 unless extended
Key Drivers of Customer Decisions
Motivations for Going Solar• Environment, legacy,
interest/hobby, network/peer effects, independence, conservation theology, simple economics
• Economics – Price of solar – Price of traditional power
(current and forecasted)– Asset and property value– Value of money– Incentives and tax credits
(Utility rebates, federal tax credit)
Constraints
• Cash or credit rating• Electricity usage• Available roof area• Shading• Alternatives to solar
Steve Wiese, Clean Energy Associates and Longhorn Solar for the Earth Wind and Fire Energy Summit, October 4, 2014
Buying Solar• Cash – most common in Texas,
straightforward purchase, cash payment then tax credit
• Loan – can help match payment flow to energy bill reduction, customer owns the system
• Lease – can help match payment flow to energy bill reduction, third party owns the system
• Others (PPA, ESPC, PACE)
The “10-2-10 rule of thumb” (for cash only)
• 10c/kWh electricity price• + $2/w-dc net installed cost of solar (after
rebates, tax credits, etc.)• Yields 10 year simple payback
Steve Wiese, Clean Energy Associates and Longhorn Solar for the Earth Wind and Fire Energy Summit, October 4, 2014
Choosing a Solar Company• Quality/Thoroughness of Bid• Credentials and Experience
• Licensed electrical contractor• NABCEP certified installers
• Knowledgeable/Attentive Sales Staff• Online Reviews
Going Solar
Sample Economics – Oncor 2014
Steve Wiese, Clean Energy Associates and Longhorn Solar for the Earth Wind and Fire Energy Summit, October 4, 2014
Oct - May June - Sept
$ per kWh $ per kWh
Tier 1 0-500 kWh $0.100 $0.100 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Tier 2 501-1,000 $0.100 $0.100 515 525 635 605 615 625 670 670 620 630 510 470
Tier 3 1,001-1,500 $0.100 $0.100
Tier 4 1,501-2,500 $0.100 $0.100
Tier 5 Over 2,500 $0.100 $0.100
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Fuel Charge $0.000 $0.000 601 512 497 548 669 1012 1271 1341 1322 1000 558 555
REP Base Monthly Charge 0.00 0.00
System Size (kW) 5.0 5
System Base Cost (no adders) $15,250 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
System Produces (kWh per year) 7090 $60.10 $51.15 $49.70 $54.84 $66.94 $101.20 $127.09 $134.11 $132.23 $100.00 $55.83 $55.45Energy Offset 72%ONCOR Rebate -$5,450 -$5,450Longhorn Solar Cash Discount -$750Out of Pocket Cost $9,050
30% Federal Tax Credit -$2,715Net Cost (after Rebates/Credits) $6,335Annual Solar Savings $709.00Estimated Payback (Years) 8.94
Financed Down Payment $1,550.00Financed Est. Monthly Payment $58.94Net Monthly Savings (Cost) $0.14
TILT 30
Your Energy Consumption by Month
Estimate using Greensky 7.99% 12 year for net cost.
Energy Use (kwh) System Production By Month Per PVWATTS (v1.0)
ONCOR R.E.P. Rate (Generalization) System Size(watts) 5000 Area of Solar (sq ft) 455
# of Panels 20 Watts/Panel 250
Estimated R.E.P. Billing (for sample purposes only)
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Consumption 601 512 497 548 669 1012 1271 1341 1322 1000 558 555
Production 515 525 635 605 615 625 670 670 620 630 510 470
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For sample purposes only – not a quotation!• System offsets 72% of customer’s electricity usage• $6,300 net cost after rebates and tax credits• Financed $1550 down yields net zero cash flow
(monthly savings = monthly payment)
Steve Wiese, Clean Energy Associates and Longhorn Solar for the Earth Wind and Fire Energy Summit, October 4, 2014
Some Final Thoughts
Policy and Incentives• Tweaking the Economics
– Rebates– Tax credits– Rate structures– Financing
• Removing Barriers to Competition– HOA rules– Solar access– Consistent, predictable, efficient
permitting processes• Big Questions and Issues
– Declining incentives– Increasing electricity prices– Utility rate structures– Utility participation model
Steve WieseClean Energy Associates
(512) 653-9651steve.wiese@cleanenergyassociates.com
Steve WieseLonghorn Solar(512) 837-4800
steve.wiese@longhornsolar.com
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