article_snippet.sent: For example, whenever there is energy in the battery available, the connection to the grid is locked.
article_snippet.sent: When energy in the battery runs out, the Sonnenspeicher connects to the grid 'in a millisecondSonnenspeicher  uses a lithium iron phosphate battery to store the energy harvested during the day by solar panels.
article_snippet.sent: For example, whenever there is energy in the battery available, the connection to the grid is locked.
article_snippet.sent: When energy in the battery runs out, the Sonnenspeicher connects to the grid 'in a millisecond'.
article_snippet.sent: If a home is predominantly powered by the grid, the Sonnenspeicher 600 will still store energy and instead act like a generator during a power cut. '