The grid operator urged states to develop rules to shield other ratepayers from data center-driven costs, but analysts said it remains unclear how a reliability auction’s costs could be allocated only to hyperscalers.

Under the Department of Energy order, the PJM Interconnection can curtail power to data centers with backup generation as a last resort before instituting rolling blackouts.

The grid operator urged states to develop rules to shield other ratepayers from data center-driven costs, but analysts said it remains unclear how a reliability auction’s costs…