SIMPO Pro E
Modules per stack: 11 only (the product allows 4 - 15; 10 or fewer sits below the HS19 range, 12 or more exceeds 1000 V at full charge)
Usable voltage range: 673 - 958 V
Capacity: 127 kWh per stack
SIMPO Pro S
Modules per stack: 16 (the product allows 10 - 16; 15 or fewer sits below the HS19 range)
Usable voltage range: 650 - 934 V (battery floor is 640 V, so a sliver of capacity at the bottom is unusable; likely acceptable as the cutoff is rarely reached, confirm with ZYC)
Capacity: 82 kWh per stack
derived from spec table per-module voltages, not yet verified