Loan guarantee countdown: DOE finalizes $337M for Mesquite Solar 1 PV project in Arizona

Facebook
Twitter
LinkedIn
Reddit
Email

As the Sept. 30 deadline for closing loan guarantees approaches, the US Department of Energy has finalized another one, this time for $337 million for the 150MW (AC) Mesquite Solar 1 power plant in Arizona. The project is owned by Sempra Energy, which has signed a 20-year power purchase agreement to sell the electricity generated to Pacific Gas & Electric.

The project, which will be built by EPC lead Zachry Holdings, will see more than 800,000 Suntech crystalline-silicon PV modules installed, with inverters supplied by Advanced Energy, marking the first utility-scale plant in the US to feature the company’s transformer-less, liquid-cooled technology. Schletter has been contracted to provide the mounting systems for the arrays.

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

The power plant will be located in Maricopa County, Arizona, about 45 miles west of Phoenix, and is expected to generate approximately 350,000MWh of electricity in its first full year of production, said to be enough to power some 31,000 homes. Some 400 construction jobs will also be created.

When DOE announced the conditional commitment for the Mesquite project loan guarantee in June, the amount was stated at $359.1 million.  

Sempra said previously that Mesquite Solar 1 will be the first part of what is planned to be a 700MW project. The initial phase construction is under way, with completion scheduled for 2013.

Read Next

Premium
July 2, 2026
As the 4 July safe harbour deadline nears, VDE Americas’ Lisa Casey says US solar is at a decisive but nuanced turning point.
July 2, 2026
The LCOE for solar PV increased marginally in 2025, reaching US$44/MWh, up from US$43/MWh in the previous year.
July 2, 2026
State-owned coal producer Coal India Limited (CIL) has secured a contract worth INR28.3 billion (US$296 million) to develop a 600MW PV project at the Jalaun Solar Park in the northern state of Uttar Pradesh, India.
July 2, 2026
India's MNRE has urged the power regulator to retain separate 'Deviation Settlement Mechanism' rules for solar and wind projects to protect them against increased financial risks.
July 2, 2026
The Massachusetts Senate’s new energy efficiency legislation has been broadly welcomed by US solar industry and clean energy representatives.

Upcoming Events

Solar Media Events
October 13, 2026
San Francisco Bay Area, USA
Solar Media Events
November 3, 2026
Málaga, Spain
Solar Media Events
November 24, 2026
Warsaw, Poland
Solar Media Events
April 20, 2027
Istanbul, Türkiye