This document discusses battery power systems for storing electricity. It proposes using battery storage systems developed in Germany in 2011 that can reliably store electrical energy. The advantages are reliable battery technology, new processors for more power, and increased security of supply. However, the disadvantages are currently very high price, limited market experience as a new technology, and potential risks if not properly handled. While implementation has challenges, there is commercial interest and people may accept buying it if the technology becomes more established.