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3. Advanced Energy Systems: AES energy storage projects.
http://www.aesenergystorage.com/projects.html
4. VDI Nachrichten (2012) Lithium-Ionen-Speicher sollen Stromversorgung im Niederspannungssektor stabilisieren.
http://www.vdi-nachrichten.com/artikel/Lithium-Ionen-Speicher-sollen-Stromversorgung-im-Niederspannungssektor-stabilisieren/56916/2
5. Kyocera news releases: Kyocera to start exclusive sales in Japan of new residential-use energy management system combining solar power with Li-ion battery storage unit.
http://global.kyocera.com/news/2012/0102_qpaq.html