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Available from 29.11.2021
This item is only available as a retrofit module of an existing storage.
Please follow the ordering process below, otherwise your order will not be processed (an extension ID from EFT-Systems is mandatory!).
With this extension module, you can increase your B-Box by a further 2.56 kWh to a maximum of 10.24 kWh. If you already have a B-box with 4 units, you will need another cabinet.