In February, Germany will begin offering incentives for people to tie energy storage systems to their solar arrays.

The three-year subsidy program is for relatively small solar systems, less than 30 kilowatts, that send electricity to the grid. Grants of $1080 will be available for each kilowatt hour of energy storage added. The program is capped at $67 million.

This new, if temporary addition to Germany's feed-in law is meant to reduce peaks in electricity production and take pressure off the grid.

Storing excess energy in batteris can reduce peaks in electricity production up to 40% and grid capacity by 66%, according to  Fraunhofer Institute for Solar Energy Systems.

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