1. CONFIDENTIAL Combined Vehicle Fueling and Back-Up Power Applications National Hydrogen Association Annual Conference May 5, 2010

2. 2 2 Robins Air Force Base, GA Solar-Integrated Forklift Refueling Hydrofiller 175 Unit Produces 10 kg/day Avālence Hydrofiller Technology  Ultra-pure H 2 and O 2 electrolytic production  Low-cost liquid alkaline construction  Zero emission operation when integrated with renewable power  Generates no CO 2 emissions  Seamlessly utilizes grid power as needed  Direct 3000 psi production eliminates the need for compressors and conditioners  High system reliability that allows long- term, unattended operation for seasonal energy storage and reuse

3. 3 3 Combining H2 Applications When using Avalence High-Pressure Hydrofillers:  All On-Site H2 Systems Require  H2 Production Unit (Includes Drying)  H2 Storage (if not directly feeding a process)  To Add Vehicle Fueling Capability  H2 Dispensing  Single Stage Compressor (For Applications at Pressures >3000 psi)  To Add Back-Up Power Delivery  H2 Fuel Cell Reduces the Relative Cost of Capital Equipment by Combining Applications that Share Common Components

4. 4 4 Combined Use System Schematic Robins Air Force Base, GA Solar-Integrated Forklift Refueling

5. 5 5 H 2 Fueling Stations Installed/Planned Robins Air Force Base, GA Solar-Integrated Forklift Refueling General Motors, MI, 3 kg/day Solar-Integrated Vehicle Refueling Installed October 2007 University of Toledo, OH, 1 kg/day Experimental Vehicle Fueler Installed June 2008 Robins Air Force Base, GA, 10 kg/day Forklift/Utility Vehicle Fueler Installed Dec 2009 Greater New Haven Transit District, (GNHTD) CT, 10 kg/day Fuel Cell Para-transit Vehicle Refueling Includes 10 kW Back-Up Power Fuel Cell Planned Installation Sept 2010 CTTRANSIT, Hartford, CT, 30 kg/day Fuel Cell Transit Bus Fueling, Partially Powered by PV Planned Installation March 2011 Solar Powered Hydrogen Fueling Station at General Motors, Milford, MI Production Storage Dispensing Self-Contained, Off-Grid Operation

6. 6 6 “Typical” Single Use Vehicle Fueling Application  Complete 10 kg/day Fueling Station  Hydrofiller 175 Production Module  30 kg of Storage at 6250 psi  5000 psi Fast Fill Dispensing  Three Zone Cascade  No Fill Communication  Fueling Fuel Cell Fork Lift  10 kW Fuel Cell  Provided by EPowerSynergies  Air Transportable on C-17 Aircraft Fork Lift Fueler, Robins Air Force Base, Georgia

7. 7 “Typical” Single Use Emergency Back-Up Power Application 7 Solar Powered Back-Up Power System at UTC Power, Windsor, CT  1 kg/day Hydrofiller 15 Production Module  5 kg of Storage at 3000 psi  5 kW Pure-Cell Fuel Cell  3 kW Photo Voltaic Array  Blended Grid and Solar Input  Fully utilizes any available PV Power

8. 8 8 Dual Use Application  Complete 10 kg/day Fueling Station  48 kg of Storage at 6250 psi  5000 psi, 3 Zone Cascade, Fast Fill Dispensing  24 foot Fuel-Cell Para-Transit Bus Operated by GNHTD (10 kg fuel tank)  Install at the Hamden, CT Department of Public Works Maintenance Facility  Includes 10 kW Fuel Cell to Provide Emergency Backup Power to the Facility. Para-Transit Bus Fueler and Back-Up Power for the Greater New Haven Transit District

9. 9 9 Para Transit Bus Fueler at the Greater New Haven Transit District Existing Gasoline Fueling Island Hamden Maintenance Facility H 2 Station Location Dispenser Compression, Storage, and Fuel Cell Production

10. 10 Minimal Cost of Adding Emergency Back-Up Power To A Fueling Station Adding Significant, Long-Duration Emergency Back-Up Power $250K of Value for a $75K Increment of Cost Increase