NVIDIA's DSX Ready qualification programme, launched 21 September 2026, lists three BESS offerings whose C-rates converge within 0.26 % at 0.5 C. Of the three qualified functions only demand response governs energy capacity; under a 100 MW / 30 s assumption load buffering carries a 240x energy margin for free. Sizing is dominated by the output axis, and the remaining design variable is unit granularity, not energy capacity.