Panasonic ’ s LJ-SK84A lithium-ion battery storage system debuted in 2015 . It boasts a storage capacity of 8kWh , an output of 2kW and the ability to replace 70 percent of a home ’ s electricity needs . At the 2015 IFA electronics show in Berlin , Panasonic Europe CEO Laurent Abadie said :

“ We are not far from achieving 100 percent in the future . The time it will take to reach that goal depends on the region . If you are in the Nordics , you need a lot of energy in the winter , when you don ’ t get much light .” Panasonic is also Tesla ’ s strategic partner at its newly-operational lithium-ion ‘ gigafactory ’. The Japanese firm will manufacture battery cells , while Tesla will construct the battery modules and packs .

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