Here, we look at this new sodium-ion BESS in more detail. Note that the company has not revealed the sodium-ion chemistry it is using for the BESS, but the most common for energy storage is sodium iron phosphate pyrophosphate (NFPP)
Operational stability: 25-30 year service life (15,000 cycles at 25°C) with >92% capacity retention at -20°C
The Tener is stated to have a long operational stability with 25–30-year service life and comes with a 30-year warranty. There is a high configuration flexibility with the system, with decoupled energy and power blocks, that allows it to be used for 1, 2, 4, 6, and 8-hours at full rated power depending on the specific requirements of the installation.
Each Tener configuration has a 30+MWh rated capacity, which means that 1GWh site can be built with 34 configurations. Each of the 8 modules making up these configurations are 42 tonnes, with 3.75MWh of capacity and two cooling units.
CATL states that a lot of the improvements in energy density of the sodium BESS are at a system level rather than cell level, although improvements continue to be made here as well.
