TSLA — AZ 509 MW + TX 140 MW Solar · Two Big Deals in a Day
Published · Updated · By Investus editorial desk (SUNRYU Partners)
Muskonomy · Bloomberg: Tesla to buy 90% of KKR-backed ContourGlobal Project Sterling output (509 MW solar + 350 MW 4-hr battery) · online 2028. Separately, full 140 MW TX solar farm output. Securing own capacity and AI-datacenter power.
Deal Details
Today from Muskonomy citing Bloomberg:
**Deal 1: Arizona Project Sterling (KKR/ContourGlobal)**
- Solar: 509 MW
- Battery storage: 350 MW · 4-hour (~1,400 MWh)
- Tesla purchase: 90% of output
- Online: 2028
- Developer: ContourGlobal (KKR-backed)
**Deal 2: Texas 140 MW Solar**
- Solar: 140 MW
- Tesla purchase: Full output
- Details: Separate announcement
Two big solar PPAs in one day.
Why Now
1. **AI datacenter power**: Recent xAI Colossus expansion · Tesla's own training compute (Texas H1 2×) need secure power
2. **Renewable energy strategy**: Tesla sustainability goal · Megapack own-utilization
3. **Favorable PPA prices**: Solar kWh cost decline makes long-term PPAs attractive
4. **TX/AZ grid**: Solar+battery in these regions enable 24-hr stable supply
Combined With Yesterday's Tesla Energy Report
Recent flow:
- **7/25**: Tesla energy storage Q2 avg $232.3/kWh · -20% YoY (competition intensifies)
- **7/27**: Musk Starlink thanks · multiplanetary frame
- **Today**: Tesla two solar PPAs in a day · 649 MW
Tesla combining (1) energy storage sales (Megapack) + (2) solar/storage own purchases.
Project Sterling's Uniqueness
509 MW solar + 350 MW × 4h battery combo enables (1) daytime solar generation, (2) battery storage, (3) night/peak-time discharge = 24-hr stable supply structure. Especially critical for datacenters.
Watch Next
(1) Next large PPA, (2) relationship with xAI Colossus power contracts, (3) whether Megapack is used in this project, (4) Project Sterling completion timing · initial operations performance.
Sources & further reading
See the body and ticker IR links for sources on this note.
Related Guides
Related articles
Anthropic's $120.5B SpaceX Compute Deal: What the 90-Day Exit Clause Means After the 'Mid-2027' Report
Anthropic's S-1/A caps SpaceX compute at $120.5B with a 90-day exit after early 2027. What the 'mid-2027' report adds and what remains unconfirmed.
35,578 Open Grok Build Apps: What Claroc Measured and What SpaceXSI Disputes
SpaceXSI's Grok Build: Claroc says 35,578 published apps opened with no sign-in. What was measured, what SpaceXSI disputes, and open questions.
Starship Flight 15 Explained: SpaceX's First Attempt to Catch Both Stages, What Is Confirmed and What Investors Should Watch
SpaceX says Starship Flight 15 is preparing to launch as soon as Friday, November 13, 2026, pending regulatory approval, on the first plan to catch both Super Heavy and the Starship upper stage. The 75-minute window opens at 4:45 p.m. CT. This note separates confirmed facts, company plans, secondary reports, and open questions. It is not a buy, a sell, or a share-price call.
Disclaimer
This article is editorial research for informational purposes only. It is not investment advice, a recommendation, or a solicitation to buy or sell any security, and does not guarantee any return. Markets carry risk of loss. Verify figures against the primary sources before making decisions.