The Grid Provides the Floor. The Private Sector Must Firm the Rest.
Why data center “flexibility” is really two products: a firm floor from the grid, and private firming above it.
Luminary Strategies

In brief
Arushi argues that data center “flexibility” covers two different products under one word. Some reforms raise the firm baseline a site can depend on; others, with ERCOT’s PCLR the most mature, open operational headroom above a conservative floor that a site can use when the system has room. She contends that private firming companies must make their batteries, generation and contracts measurable, dispatchable and attributable to a site’s consumption before that firming can count and be financed, and that cleaner vocabulary will produce cleaner rules.
Key points
- 01Split data center load into a grid-backed firm floor and a dispatchable band above it.
- 02ERCOT’s PCLR is the most mature operational headroom product; PJM is working through a different mix.
- 03Private firming has to be measurable, dispatchable and attributable before it can be financed.
“The grid provides the floor. The private sector firms the rest.”



