Storage batteries — especially those for home use — have been gaining attention since the March 11 earthquake and tsunami crippled the Fukushima No. 1 nuclear plant and sparked fears of blackouts hitting Tokyo during another sweltering summer.
Although large systems designed for industrial use are still mainly in the experimental stage, several home-use power storage systems are already on the market or on their way.
Given the seriousness of the disaster, use of the systems is expected to climb if prices drop enough.