For data center developers
Curtailable terms meet air-permit reality. We model the swing, per POI, before you sign.
The trap, in three steps
A non-firm or curtailable interconnection path can energize earlier, but the utility can still curtail you during peaks.
Backup generation only closes the gap if the federal rules and site permit let those hours count.
When those hour buckets run out before the curtailment events do, your nameplate quietly de-rates.
Air permit hours vs. expected curtailment
ERCOT West · 280 MW load · summer 2026 dispatch model
Live regulatory windows
What we send back
Effective capacity, the binding constraint, and a recommendation you can take into the ISA negotiation. Sources cited.
De-rate analysis · Apr 2026
ERCOT West · 280 MW load
SB 6 curtailable · Cluster D · COD Q3 2027
Nameplate
280 MW
Effective capacity
198 MW
−82 MW · 29% de-rate
Binding constraint
Recommendation
Negotiate a higher backup runtime cap before signing the ISA, or re-spec to firm interconnection in Cluster B. Either path closes the 144-hr gap.
Run it yourself
The calculator returns an effective MW number, the binding rule, and a $/MW-yr net value as you type. The full report unlocks with your email.