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RU-190 — 800-MW battery energy storage system (BESS) and ancillary facilities to support photovoltaic (PV) solar energy generation in Maricopa County, AZ

This rezoning application seeks to convert 65 acres of rural land to industrial zoning to develop a large-scale battery energy storage facility (800 MW) that will support existing and future solar projects in the area. The applicant is requesting multiple modifications to standard county development standards through an Industrial Unit Plan of Development overlay, including reduced parking and landscaping requirements, alternative fencing options, and increased setbacks (100 feet on all sides) to accommodate the remote, unmanned nature of the facility. The project is anticipated to begin construction in 2026 with commercial operations by 2028 or later, creating a small operational workforce but requiring minimal routine vehicle traffic once operational.

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Property & nearby activity

Case history

Every time this case appeared on an agenda we watched, and what changed.

• First seen — 2026-08-13: First seen on a Maricopa County Planning & Zoning agenda · Maricopa County Planning & Zoning

Also on the 2026-02-25 Maricopa County agenda

• Z250031 — Battery energy storage system (BESS) facility with power generation and distribution uses; 800-MW storage system with approximately 15 acres reserved for power transfer substation use

Other Maricopa County rezoning cases

• 12-1132 — PD Amendment
• Z2021003 — Single-family residential (89 lots)
• Z250035 — Single-family residential subdivision (89 single-story homes, 1200-1500 sq ft)
• 50-400 — Recreational open-air facility for community events and large assemblies (Gambel Field)