Symmetra PX with 2 of external battery bank, can have a different count of batt in each bank ?

[BigBallBull]

Dear all, we have 1 symmetra px with 2 external power bank which is split into 48 pcs batt each ( total 96 pcs batt ) right now in bank 1 there is 2 batt is broken make all the bank 1 is not working with bank 2 still working correctly, is it possible that we take out 2 the dead batt, resulting in, 46 pcs batt in bank 1 and 48 pcs batt in bank 2 or should be setup to 47 pcs batt for each bank

any suggestion are welcome, thank you.

Thomas

[KarimEissa · Accepted solution]

Hello,

It seems you had Symmetra PX 250/500 unit,it is recommended to keep the number of blocks is 48 per string ( maximum three strings or 144 cells )  as it is recommended to keep 288 VDC  in both positive and negative wi side of the batteries  (or 576 VDC  nominal) to get the most optimized runtime ,but no issues if only  maximum 2 cells for each string is not available 

The UPS supports customer-specific battery solutions with 144 cells (+/- 6 cells) for runtime optimization. The display has settings for number of cells on DC voltage levels (V/cell)

Regards,

Karim