6 FAQs about Home energy storage field data

Can a multi-year field measurement predict the battery capacity of home storage systems?

The multi-year field measurements provide insight into the operation of home storage systems. We subsequently developed a method for estimating the usable battery capacity of home storage systems tailored to their operational patterns.

Is there a capacity estimation method for home storage systems?

Now, a large open-access dataset from eight years of field measurements of home storage systems is presented, enabling the development of a capacity estimation method. You have full access to this article via your institution. The global battery energy storage market has grown rapidly over the past ten years.

Are home storage systems the future of battery energy storage?

The global battery energy storage market has grown rapidly over the past ten years. Home storage systems have made an important contribution to this growth, representing one way for the public to participate in the energy transition.

How many home storage systems are there in Germany?

The dataset accompanies the Nature Energy publication by Figgener et al. (2024), Multi-year field measurements of home storage systems and their use in capacity estimation, DOI 10.1038/s41560-024-01620-9. The ISEA / CARL of RWTH Aachen University measured 21 private home storage systems in Germany over up to eight years from 2015 to 2022.

What are energy storage systems?

Energy storage systems allow energy consumption to be separated in time from the production of energy, whether it be electrical or thermal energy. The storing of electricity typically occurs in chemical (e.g., lead acid batteries or lithium-ion batteries, to name just two of the best known) or mechanical means (e.g., pumped hydro storage).

Can a lithium-ion home storage system be measured in a field?

To validate this method, we performed a total of 60 field capacity tests over the lifetime of 18 systems (Fig. 1a,b). To the best of our knowledge, there are no comparable multi-year field measurements of lithium-ion home storage systems. Fig. 1: Field capacity tests and validation of the capacity estimation method.

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