The energy storage system is meant to be used in tandem with distributed solar installations with storage systems developed in Germany; the funds come with a maximum size requirement of 30 kilowatts. The batteries must have a warranty of at least seven years to gain the subsidy. Another requirement is that the PV installation sends 60 percent of its capacity to the grid over the lifetime of the plant. The battery subsidies will apply retroactively when connected to solar systems installed in 2013, according to reports in PV Magazine.
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