1. Innovation Energy Storage E.ON Innovation Center Energy Storage

2. Reasons for energy storage increasing variable generation always been fluctuating demand

3. Energy storage technologies Proven Technology - Potential for improvement - New Technology Heat storage Power-to-Gas Gas storage Power-to-Power Power-to-Gas Power-to-Heat Battery Capacitor Fly Wheel Pumped Storage (A) CAES

4. Flexibility from … Gas-to-Power/Heat Coal-to-Power/Heat GenerationGrids Power Heat Gas Wind/Solar-to-Power Power-to-Gas Power-to-Heat Power-to-Power Storage Demand / decentralized generation Residential | Mobility | SME | Industry

5. CAES Huntorf 0,9 GWh PSP Waldeck: total 4,3 GWh Hydrogen storage: 84 GWh Gas Storage: 260 GWh Vessel, 150.000 t Hard coal, 540 GWh el 1,4 h 17 d 5 d 6 h Period over which a 800 MW generation plant can be fueled 35 d Assumption: - for hydrogen and UGS respectively small size caverns of 300.000 m 3 volume (=Huntorf), - Efficiency gas generation: 0,6 Comparing the energy content

6. Comparison of of 1 GW (1000 MW) transport capacity corresponding to the power of an large scale power plant or peak power of 200 wind turbine Transmission gridPipeline (0,6 m of diameter)

7. H2H2 Electrolysis Power Grid Power to Gas connects markets Power IndustryMobilityHeating Natural gas grid Power 3 IndustryMobilityHeating CO 2 SNG CH 4,Bio Certificate Power Certificate Gas Natural Gas & Renewable Gas Renewable Hydrogen

8. Storage solutions are required for the integration of renewable energy, but will only come if a regulatory level playing field with other flexibility options is developed. Different storage technologies render different services. Energy storage technologies can couple the power, heat and gas market. For integration of a steadily increasing share of renewable energy, grid extension and demand side management and flexible generation and storage are needed. Energy storage demonstrations show that a good basis for public acceptance is given. Summary

9.  Utilization of high efficient “Proton Exchange Membrane“ electrolysis (PEM)  Demonstration within E.ON infrastructure  Business development Goals Example: „WindGas Hamburg“  Public funding from BMVDI  Power: 1.5 MW el (stack)  Hydrogen production: 290 m³/h  Fed into the local gas grid  Planned start of operation: 2015 Key Parameters Funding & Partners

10. 10 Example: Project „WindGas Hamburg“

11. 11 Example: Project „WindGas Hamburg“