1,500 MW Solar + 1,500 MW BESS | Arizona

The Sun Mesa – Cholla Giga Site is a large-scale renewable energy project designed to provide up to 1,500 MW of solar generation paired with 1,500 MW of battery storage (12+ hour duration). Strategically located in northern Arizona at an elevation above 5,600 feet, the site spans 11,000+ acres, with 200–500 acres available for data center or BTC operators seeking direct access to onsite power and fiber connectivity.

Key Highlights

• Market: APS / Behind-the-meter (BTM) supply with co-location potential.

• Capacity: 1,500 MW PV + 1,500 MW BESS (onsite, 2025–26 start).

• Annual Output: ~13,000,000 MWh (solar + BESS combined).

• Infrastructure:

  • Dual 345 kV double-circuit APS transmission lines onsite.

  • Planned 345 kV switchyard and substations for interconnection.

  • Access to 34.5 kV and 69 kV for microgrid connectivity.

• Fiber Connectivity: Adjacent to CenturyLink backbone linking Dallas–Las Vegas.

• Land Control: 11,000+ acres under site control; QOZ designation through 2026.

• Timeline: Targeting Q4 2025 BTM operations, with grid COD expected Q4 2028.

• Term: 15 years.

Strategic Advantages

• Scalable Development: Ample acreage available for hyperscale data center co-location.

• Prime Transmission Location: Direct tie-in to APS grid via 345 kV double-circuit lines crossing the property.

• Future-Ready Infrastructure: Supports additional BTM power supply and microgrid solutions.

• Incentives: Located in a Qualified Opportunity Zone, USDA-eligible, and in an energy community zone.