1. Group Solar Purchasing Making Solar Energy More Affordable

2. Driving down costs will greatly increase addressable market for residential PV Source: ThinkEquity “Think Greentech” Feb 2010

3. Average Price Residential Fix Mounted System - $/Watt Installed Systems co funded by Focus on Energy $4.75 Commercial (50 kW) $3.25 Utility (1 MW) 200220032004200520062007200820092010 $9.28$8.94$7.49$8.34$7.54$8.07$8.49$8.30$6.90

5. Different name, same outcome  “Aggregate purchasing”  “Bulk solar”  “Solarize”  “Group solar”  “Collaborative purchasing”

6. Why Collaborative Purchasing Works  Efficient  Aggregated development process  Expert + collective experiences  Assurances, safety in numbers  Affordable  Pre-negotiated discounts  Competitive bidding process  Faster Adoption  Limited time offers

7. Models  Community-based  Fee-based  Solar contractor sponsored

8. MadiSUN Case Study  250 homeowners  100 workshop attendees  20 participants  4 installers  Average price: $5.48 per watt  Average savings: 20%  Impact: 78kW, 10% increase in solar PV

9. Key design considerations (pre-commitment approach)  Level of commitment needed from participants  Decision-making process

10. Key design considerations (pre-select installer approach)  Selection committee make-up  Weighted value of selection criteria  Expected level of participation  One or multiple installers

11. Key Lessons Learned  Identify key responsibilities  Sponsor  Project leader  Technical expert  Limited time offer  Index pricing

12. In the works…  WECC Commercial Group Buy  MREA/Milwaukee Shines  MadiSUN/Willy Street Grocery Cooperative  Marshfield Sustainability Committee

13. Questions  Bryant Moroder  bryant@madisun.org