Kenneth Brown and Andrew McClaine

1. Kenneth Brown and Andrew McClaine Electricity Stored as Hydrogen in a Rechargeable Metal Hydride Slurry

2. The Slurry

3. Safe Hydrogen’s Technology • Slurry of Magnesium/Magnesium Hydride—a liquid • Safe—very slow reaction with H2O or air • Absorbs and desorbs H2 • Delivers H2 for <$3 per kg, equivalent to <$3US per US gallon gasoline or <.60 Euros per liter • Hydrogen for natural gas price equivalent to $12US per million BTU, .06 Euros per KWh • Capital cost for storing electricity <$10 US per kWh or <7 Euros per kWh • Uses today’s infrastructure

4. First Uses • Store intermittent electricity Wind, Solar, and tidal • Back up Systems • Utility Battery • Deliver H2 to fueling stations

5. Electricity Storage with Slurry Electric Distribution Wind Turbine Tank Farm Slurry Electrolyzer Gas Turbine Slurry Transport by road, rail, or barge

6. Storing Wind Energy

7. Firming 500 MW Wind Farm

8. Power Flows

9. Technology Costs

10. Technology Comparisons • Technology Pros(relatively) Cons(relatively) • Pumped Storage High Capacity Special Site Requirements • Low Capital Cost • CAES High Capacity Special Site Requirements • Low Capital Cost Natural Gas Requirement • Efficiency • Lead Acid Battery Low Capital Cost Limited life cycle • Sodium/Sulfur High Power Density Cost • Batteries High Energy Density • High Efficiency • Flow Batteries High Capacity Low Energy Density • Independent Power & • Energy Ratings

11. Technology Comparisons (Cont.) • Technology Pros(relatively) Cons(relatively) • Li Ion Batteries High Power Density Cost • High Energy Density Specialized Charging • High Efficiency • Nickel/Cadmium High Power Density Cost • BatteriesHigh Energy Density • High Efficiency • Metal Air Very High Energy Density Recharge Expensive • Batteries

12. Technology Comparisons (Cont.) • Technology Pros(relatively) Cons(relatively) • Capacitors Long Cycle Life Low Energy Density • High Efficiency • Flywheels High Power Low Energy Density • Long Cycle Life • Gravity Power Low Capital Costs Low Energy Density • Easy to site • Slurry Low Capital Cost Low Power Density • High Capacity Low Efficiency • High Energy Density • Long Discharge time • Independent Power & • Energy Ratings Easy to site

13. Key cost driver

14. IP • US Patent 7052671—Storage, Generation, and Use of Hydrogen May 30, 2006 • US Patent 7,790,013 B2--Storing and Transporting Energy, September 7, 2010

15. Team • Ken Brown—Managing Partner—BS Engineering from Yale, MBA from Harvard—marketing, business development, product management • Andy McClaine—Managing Partner, CTO—BS Engineering from Trinity, MSME from Stanford—project management, research • Dave Bowen—Contractor—Bachelor of Engineering from Liverpool—high temperature processes, research, reactor design

16. We want to talk about: • Adding Storage to your wind farm • Doing Storage as part of your wind farm project • Doing a joint venture on backup power

17. Contact Information • Safe Hydrogen, LLC 30 York Street Lexington, MA 02420 USA Ken Brown, Managing Partner 1-781-572-0334 Andy McClaine, Managing Partner 1-781-572-0335 www.safehydrogen.com