Worked example · 100 MWdc existing PV · Pecos, Texas
Book 50 MW. Then 64. Then 82. Recip stays 22.
Phase 1 is the underwritten farm case — grid-tied, cooler on 8–10% of tables, 50 MW of design-target 99.9% firm AI at the existing meter. Remaining PV stays generation on GCCM. Leftover acres take Phase 2 CSP on concrete rail. TES is booked in Phase 2: +14 MWe, 64 MW, +$42M/year, same loop, no dry-cooler condenser. Phase 3 spends +18 MWe on extra halls — 82 MW — with recip still 22 MW inside a 54 MW dirty cap. 111 MW is a different stack.
- Phase 1 — cooling
- +50 MW AI
Design-target 99.9% firm AI. Cooling on 10% of tables. Remaining PV stays generation. First commercial plant.
- Phase 2 — TES booked
- 64 MW AI
TES booked here. +14 MWe on the same radiator loop. 64 MW. No dry-cooler condenser.
- Phase 3 — extra halls
- 82 MW AI
+18 MWe extra halls. 82 MW. Recip 22 MW. Dirty cap 54 MW. Not 111/154.
Starting plant is 100 MWdc on the same land. Re-module holds 100 MWdc of PV on a denser foundation. 40–50 acres convert to radiator tables. Leftover acres take Phase 2 CSP steel. TES is booked in Phase 2. Phase 3 is extra halls.
$150M / year — Phase 1 firm
50 MW of design-target 99.9% firm AI × $3M per MW-year planning value. A planning year, not a live meter.
$192M / year — 64 MW
Phase 2: 50 + 14 MWe. Same $3M rate. TES booked. Same radiator loop.
82 MW — extra halls
Phase 3: 50 + 14 + 18. $246M/year at $3M per MW-year. Recip 22 MW. Dirty cap 54 MW.
Phase 3 is extra halls, not a residual plant that holds 50 MW. 430 °C exhaust goes direct to HT TES. +18 MWe, 82 MW of IT, +$54M/year. Recip stays 22 MW. Dirty cap 54 MW unchanged. 111 MW firm / 154 MW flex / $333M is the interconnect-off stack — a different walk. Not in the Phase 1 offtake.
Eight-day Pecos screen on the radiator campus: 50 MW firm served in the window, PV held at 100 MWdc, 50 acres reserved for tables. A full-year radiator-campus run is not yet the published design target. Prior whole-field radial year is not this plant. A 10 MWdc pilot — about 5 MW of firm IT — is the step that validates hot-day performance, parasitic demand, and ground-temperature behavior at commercial scale.