What to establish before acting
First identify whether the relevant region uses the capacity structure being discussed. Obtain the customer quantity, units, effective period, scaling, reset method, and supplier treatment. Monthly site demand and a system-based capacity obligation can differ. Peak-management actions may affect a later year and only if they change the relevant measurement and the contract passes through the benefit. Use primary market documents and account data rather than a generic invoice label.
Illustrative decision boundary
At an illustrative 0.05 MW obligation and $100/MW-day for 30 days, the simplified amount is $150 before adjustments. This is a unit example, not a market price or customer estimate. Actual allocation and contract provisions must be applied before budgeting.
Documents for a useful review
- Current obligation, source data, units, scaling, and delivery period.
- Supplier inclusion, pass-through, reconciliation, and adjustment clauses.
- Relevant market rules and verified peak-management methodology.
Questions & answers
Is capacity measured in kWh?
The underlying obligation generally concerns power capability in kW or MW, with a defined period and pricing unit. Energy quantity is a different measure.
Is capacity the same as delivery demand?
No. The market obligation and utility tariff can use different peaks, scaling, calendars, and billing methods. Inspect both instead of combining similar-sounding labels.
Can a fixed offer still pass capacity through?
Yes if that is the written scope or an exception permits it. Ask for explicit inclusion and adjustment language, not just the product name.
Will reducing my monthly peak cut capacity immediately?
Not necessarily. The system counting intervals, allocation method, reset timing, and supplier contract determine the effect and lag.
Do all regions work like PJM?
No. Market design differs; ERCOT’s energy-only structure should not be explained as an identical forward capacity market.
Does paying capacity guarantee uninterrupted service?
No. Resource adequacy is one part of reliability. Local distribution faults, building equipment, weather, and other conditions still matter, so resilience needs a separate critical-service plan.
Sources & scope
Primary references reviewed October 15, 2026. These sources support the stated concepts; actual tariffs, program rules and signed agreements govern the account. Decision examples and operational worksheets are original educational analysis.
- PJM: Capacity Market (RPM)
Capacity auctions, delivery periods, and primary market documents. - FERC: Wholesale electricity markets overview
Wholesale energy, capacity, and ancillary-service functions. - ERCOT: Energy-only wholesale market
Texas energy market design and distinction from a forward capacity market. - DOE FEMP: Evaluating your utility rate options
Demand, ratchets, time-of-use rates, coincident peaks, and standby charges.