AEP SOLAR TX 1, LLC

Solar

24/7 Renewable Baseload Power for Hyperscale AI Data Centers

Fully integrated 100–500 MW solar-thermal power platform — deployed in 12–14 months, not 3–5 years. Firm, dispatchable, carbon-free generation that runs 8,760 hours a year.

100–500

MW Per System

12–14

Months NTP to COD

8,760

Hrs/Yrs Baseload

25+

Year Asset Life

THE STSR PROCESS

Three Integrated Steps. One Reliable Outcome.

From sunlight to socket – our integrated architecture ensures efficient conversion, long-duration storage, and dependable power delivery around the clock.

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Parabolic Trough Collection

Curved mirrors concentrate sunlight into high-temperature thermal heat.

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Thermal Energy Storage (TESS)

Heat stored in a phase-change medium (<1% daily loss) enables round-the-clock dispatch, up to 8 -12 days.

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Rankine Cycle Steam Turbines

Stored heat drives steam turbines — the same Rankine cycle producing 80% of world electricity today. N+1 modular units keep power flowing during STSR maintenance.

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Firm, dispatchable, carbon-free generation — running 8,760 hours a year.

N+1 design isolates units for STSR maintenance without interrupting delivery to your data center.

8760

Hours of operation each year

N+ 1

Modular redundancy for uptime

100%

Carbon-free at point of use
AEP STSR PLATFORM VS. CONVENTIONAL SOLAR

Continuous renewable power, without the conventional limitations.

From generation and long-duration storage to dependable delivery, STSR provides firm renewable power around the clock.

Feature AEP STSR Platform Conventional Solar PV + Battery
Power Output
AEP STSR — Firm 24/7 baseload (8,760 hrs/yr) Conventional — Intermittent; battery limited
Storage Duration
AEP STSR — Overbuilt, long-duration thermal Conventional — 4–8 hour battery discharge
Daily Degradation
AEP STSR — Less than 1% Conventional — Significant battery fade
Asset Life
AEP STSR — 25+ years Conventional — 10–15 year battery replacement
Grid Dependency
AEP STSR — Fully off-grid capable Conventional — Requires grid backup at night
Land Footprint
AEP STSR — 100 MW in 12 acres (60× less) Conventional — Large land requirements
Fuel Source
AEP STSR — 100% renewable solar thermal Conventional — Solar PV + grid mix
Carbon
AEP STSR — Zero Scope 2 emissions (hourly) Conventional — Annual matching only
PROVEN EXECUTION

Grounded in operating performance data — not forecasts.

Multiple plants commissioned to date, headlined by a KBR-delivered 6 MW reference facility available for site visits and technical due diligence at any time.

6 MW reference plant — field construction in progress

6 MW reference plant

Field construction in progres
TESS & balance-of-plant equipment on site

Thermal Energy Storage (TESS)

TESS & balance-of-plant equipment on site
6 MW REFERENCE PLANT

Commissioned January 2026 — Operating Today

The KBR-delivered 6 MW reference plant is in commercial operation — a de-risked, fully commissioned commercial-scale asset available for site tours, walk-downs, and independent engineer review.

The 100MW project deploys the identical modular platform. Scaling from 100MW to 500MW is purely additive — drop in additional standardized modules. No re-engineering. No re-design. No first-of-a-kind risk.

Commercial-scale operation proven — not modeled

54-day field build demonstrated at reference plant

Modular platform engineered for 100–500MW replication

Zero first-of-a-kind risk on future deployments

Bankable performance record for IE and tax equity diligence

De-risked. Built, commissioned, operating today at scale.

DEPLOYMENT TIMELINE

FROM NTP TO COD

Typical Deployment Timeline: 12-14 Months

Step 1: Site Design & Engineering Site-adapted layout, foundation design, and interconnection engineering finalized on the pre-engineered KBR platform.
Step 2: Modular Manufacturing Turbine blocks, TESS, and Omni-DC handoff fabricated in parallel under KBR's Tier-1 EPC wrap and QA program.
Step 3: Field Installation Modules delivered and erected on schedule — foundations, collector field, TESS, and power block installed under fixed-price EPC.
Step 4: Commissioning & Handoff Full hot-fill, performance testing, and IE-witnessed acceptance prior to COD and 20-year PPA commencement.
HOW THE SYSTEM WORKS

Firm renewable energy delivery — step by step

From capturing solar energy to delivering reliable DC power, the Omni-DC™ system uses a streamlined five-stage process designed for continuous, efficient energy delivery.

1

Solar Collection

Parabolic-trough collectors concentrate sunlight and heat the organic heat transfer liquid to almost 1,000° F.
2

Thermal Storage

TESS holds 8–12 days of stored energy, enabling 24/7 dispatch across all weather conditions.
3

Rankine Cycle

Steam turbine array — 21× 25 MW blocks (N+1 redundancy) — converts stored heat to electricity.
4

SiC Rectification

Silicon-carbide rectifiers convert 480V 3-phase AC to 24 kV DC with >99% efficiency.
5

DC Handoff

24 kV DC delivered directly to the data-center DC bus — no interconnection, no substation, transmission.
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KEY ADVANTAGE

A more direct path from sunlight to usable power

The Omni-DC™ handoff removes unnecessary AC/DC/AC conversion stages, helping avoid approximately 4–7% conversion losses while also reducing dependence on lengthy grid interconnection processes and costly transmission infrastructure.

FOCUSING ON DIRECT DC POWER DELIVERY

Delivering power directly to the data-center DC bus

Our Mission

The OMNI-DC™ Handoff System is designed to deliver renewable energy directly to a data center’s DC infrastructure. By supplying power at the DC bus, the system creates a more direct connection between solar-thermal generation and the facility’s electrical needs.

Solar energy is collected and stored as thermal energy before being converted into electricity through a Rankine turbine. The generated power then passes through a silicon carbide (SiC) rectifier, producing 24 kV DC for delivery directly to the data-center DC bus.

This streamlined approach helps reduce unnecessary power-conversion stages between generation and the data center, creating a simpler pathway from solar-thermal collection → thermal storage → power generation → DC delivery.

SYSTEM ARCHITECTURE & TECHNOLOGY

System Specification & Component Selection

Engineered for performance, built on proven technology, and backed by real-world operation.

TECHNICAL SPECIFICATION
Firm Capacity
100 MW
Installed Nameplate
125 MW (N+1)
Turbine Blocks
21 × 25 MW modular Rankine
Collector Field
Parabolic-trough, Closed Loop HTF
Storage
Thermal Energy Storage System TESS, 8–12 days
Peak Field Temp
1000 °F hot / 290 °C cold
Rectification
SiC-based, 480V AC → 24 kV DC
Handoff Voltage
24 kV DC to data-center bus
Availability Target
≥99.2% (24/7/365)
Capacity Factor
≥99.2% contracted delivery
Site Footprint
≈12 acres per 100 MW
Design Life
30 years (major overhaul at Y15)
KBR BANKABILITY

KBR-Certified Reference Plant
Operating Since January 2026

Reference Plant
6 MW pilot facility
Commissioned
January 2026
Field Build Time
≈54 days
EPC Wrap
KBR (NYSE: KBR) — Tier-1 EPC
Performance
≥99.2% availability demonstrated
Warranty
2-year mechanical + 5-year output
EPC PARTNER - KBR

KBR at a Glance & EPC Scope

KBR brings global engineering expertise, proven project delivery, and large-scale execution capabilities to support the successful development of the project. As the EPC partner, KBR provides an integrated approach covering engineering, procurement, construction, commissioning, and long-term performance.

$ 8.3B

Market Cap
NYSE: KBR

$ 7.7B

REVENUE (FY25)
Diversified engineering

~ 35000

EMPLOYEES
Global operations

6MW

REFERENCE PLANT
Commissioned Jan 2026

EPC Contract Scope

Design & Engineering

  • Full site-specific engineering package
  • P&ID, single-line, civil, structural
  • Grid-independent DC handoff design
  • IE-reviewable Basis of Design (BoD)

Procurement

  • Solar collector field (Tier-1 OEM)
  • TESS storage tanks (fabricated on-site)
  • 21× 25 MW Rankine turbine blocks
  • SiC rectifiers + 24 kV DC switchgear

Construction & Commissioning

  • ≈100-day field construction per block
  • Fixed price · date-certain · LDs
  • Wrapped performance guarantee
  • 5-year output guarantee post-COD