IPX Power Closes $4.95 Billion Financing for 1.15 GW Solar and 4.6 GWh Storage Project in California

IPX Power, an independent power producer, has closed committed financing totalling $4.95 billion for the construction and operation of the Darden solar and battery storage projects in Fresno County, California, marking the company's first project financing since its formation. The Darden project is expected to generate up to 1.15 gigawatts of solar power and include 4.6 gigawatt hours of battery storage, with commercial operations targeted for 2028. Located on privately owned retired agricultural land in California's Central Valley, the project represents one of the largest single solar-plus-storage project financings closed in the United States to date.

 

The Complex Financing Structure

 

The $4.95 billion financing package comprises four interconnected components reflecting the multiple capital sources now standard in large-scale renewable energy project finance. The construction debt totals $4.95 billion and includes a $403 million letter of credit facility, a $911 million tax equity bridge loan, a $1.81 billion tax credit transfer bridge loan and a $1.83 billion construction loan that will convert to a term loan upon project completion. In addition to the construction debt, the financing includes $929 million in aggregate tax equity commitments and tax credit purchase agreements covering the project's aggregate $2.13 billion investment tax credits.

J.P. Morgan and Morgan Stanley provided the tax equity commitment, with J.P. Morgan also committing to purchase the portion of investment tax credits not allocated to tax equity investors. The purchase commitment is expected to be replaced by tax credit purchase agreements with third-party buyers during construction, reflecting the active market for transferable tax credits established under United States clean energy legislation. The complexity of the structure, spanning multiple bridge facilities, term debt, tax equity and tax credit transfer mechanisms, illustrates how project finance has evolved to capture the full range of federal tax incentives available to large-scale clean energy projects.

 

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The Scale of Banking Participation

 

The breadth of the lending syndicate reflects the scale and quality of the Darden project. MUFG Bank, Banco Santander, Crédit Agricole Corporate and Investment Bank, Deutsche Bank and Société Générale served as initial coordinating lead arrangers and joint bookrunners. BNP Paribas, CIBC Capital Markets, CoBank, HSBC Bank USA, Intesa Sanpaolo, J.P. Morgan, National Bank of Canada, NORD/LB, Royal Bank of Canada, Standard Chartered, Truist Securities, Wells Fargo Securities and Westpac Banking Corporation served as coordinating lead arrangers, with KeyBanc Capital Markets as joint lead arranger. MUFG Bank served as administrative agent and Banco Santander as green loan arranger.

The participation of seventeen lenders across multiple continents in a single project financing reflects both the global appetite for United States clean energy assets and the practical necessity of syndicating a facility of this size across a broad institutional base. The green loan designation arranged by Banco Santander adds a sustainability label to the debt, aligning the financing with green loan principles and potentially expanding the eligible investor universe. The involvement of both United States and international banks also provides geographic risk diversification for the lending group.

 

Project Characteristics and Site Selection

 

The Darden project is located on privately owned retired agricultural land in California's Central Valley, an approach that addresses one of the key environmental and social concerns associated with large-scale solar development by avoiding competition with active agricultural production or ecologically sensitive land. The Central Valley's high solar irradiance makes it one of the most productive locations for solar generation in the United States, while the availability of large contiguous parcels of retired farmland reduces the complexity and cost of site assembly. The combination of resource quality and land use credentials strengthens the project's environmental profile.

The 4.6 gigawatt hour battery storage component is particularly significant for the California market, where the state grid operator frequently experiences demand for storage capacity during evening hours as solar generation declines. Large-scale co-located storage of this magnitude can provide multiple grid services including energy arbitrage, frequency regulation and capacity, creating multiple revenue streams that improve project economics relative to standalone solar. The combination also supports California's reliability requirements as the state continues to accelerate its transition away from fossil fuel generation.

 

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Outlook for Large-Scale Solar and Storage Project Finance

 

The Darden financing arrives at a time when announced large-scale solar project funding in the United States increased by 61 percent in the first quarter of 2026 year-on-year, according to Mercom Capital's Q1 2026 Solar Funding and M&A report. This acceleration reflects both the maturing tax credit transfer market established under the Inflation Reduction Act and growing corporate and utility demand for clean energy capacity to support AI data centre expansion and broader electrification. Projects of the Darden scale are increasingly becoming reference transactions that establish pricing and structural benchmarks for subsequent project financings across the sector.

Whether IPX Power can replicate the Darden financing structure and scale for future projects will depend on the continued depth of tax credit transfer markets, the availability of construction debt capacity across the banking syndicate and the pace of interconnection approvals for new generation in California. Sustained execution would establish IPX Power as a leading independent power producer capable of developing and financing clean energy infrastructure at gigawatt scale. The Darden project's combination of scale, structural innovation and environmental credentials positions it as one of the benchmark transactions in United States renewable energy project finance for 2026.