Why insist on 20 cycles (I assume per day)? The BESS does not need to be cycling (charing/discharging) to provide this instantaneous short-circuit level support? This same mistake is often made when considering inertia from Grid-Forming BESS. It's instantaneous in response to a fault.

Can get to 2x with grid-forming and >2 with inverter oversizing

A few things (I won these contracts):
- 3x different locations, each BESS is ~4 units separately controlled/traded
- Providing SCL. “Short-circuit fault current” is SMA language
- You may want to spinning mass but GWs of BESS is being built. Making it Grid-Forming = massive cost & stability benefits