Reliability Generators in ERCOT: Comparing Three Project Scenarios
1,000 kW Asset
Market Prices
Outage Value
Project Returns
Reliability generators in ERCOT can serve as both backup power and revenue-producing assets. This analysis compares three 1,000 kW scenarios to illustrate how market-price assumptions and the value assigned to outages can materially alter project economics.
Three Project Scenarios
2023 pricing
6.52-year payback
12.91% IRR
$317,015 NPV
2021 pricing
3.11-year payback
32.09% IRR
$2.83M NPV
2021 pricing + lower outage value
3.46-year payback
28.48% IRR
$2.32M NPV
Multiple Revenue Streams Support the Project
The most significant modeled differences come from wholesale energy prices, ancillary-services prices, and the value assigned to reliability.
Market Prices Can Produce Large Swings in Returns
Approximate annual wholesale energy value in the 2023-price case
Approximate annual wholesale energy value using 2021 pricing
Approximate ancillary-services value in the higher-price case
The Assigned Value of Reliability Is Also Critical
Reducing the assumed annual cost of an extended outage from $100,000 to $25,000 lowers NPV by more than half a million dollars and reduces ROI materially, even when the wholesale-market assumptions remain unchanged.
ERCOT generator economics depend heavily on both the market-price environment and the facility-specific financial impact of losing power.
