Estimating the total cost of energy storage connected to a rooftop PV installation is a complex affair, involving factors such as tax, the policy environment, system lifetimes, and even the weather. As part of its extensive overview of distributed energy storage in Germany, pv magazine Deutschland analyzed the efficiency of different battery energy storage systems to create a comparable index that illustrates the cost of a stored kilowatt-hour.
RCT’s Power Storage DC 10.0 product achieved the highest performance in our index, at 95.1%.
Image: pv magazine/Julia Malcher
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