That is the model-specific maximum quantity stated in the datasheet, whereas the 5.12kWh and 8.03kWh versions are listed for up to 32 units. The difference means expansion planning should begin with the exact model, not just the product-family name. A solar storage system based on a 2.56kWh battery has a much lower published parallel ceiling than one built around the larger 25.6V models, so future kWh requirements should be considered before the first battery is selected. That ceiling should be considered before the first battery is selected.
