Puerto Rico's Rooftop Solar Eclipses Natural Gas as Second-Largest Power Source

2026-04-03 economy

San Juan, Friday, 3 April 2026.
Despite recent federal funding cuts, Puerto Rico’s decentralized rooftop solar reached 1.5 gigawatts in 2025, overtaking natural gas to supply twenty percent of the island’s total electricity.

A Grid Transformed by Necessity

Data released by the U.S. Energy Information Administration (EIA) reveals a dramatic restructuring of Puerto Rico’s energy infrastructure. By the end of 2025, the island’s rooftop solar generating capacity reached 1.456 gigawatts, officially eclipsing natural gas, which stood at 1.391 gigawatts [3]. While petroleum liquids remain the dominant energy source at 3.671 gigawatts, decentralized solar has fundamentally altered the territory’s power dynamics [3]. Between 2016 and 2025, rooftop solar installations accounted for 81 percent of all new generating capacity on the island [3]. This surge was catalyzed by the devastating impact of Hurricane Maria in August 2017, which crippled 80 percent of the grid and caused net power generation to plummet from 1.57 million megawatt-hours to a mere 0.27 million megawatt-hours by October 2017 [1][5]. Driven by the need for survival and resilience, total generation capacity has since rebounded and expanded from below 6 gigawatts to over 7 gigawatts, largely fueled by citizen-led solar adoption [1][5].

Economic Implications of Decentralized Power

The economic ramifications of this shift are profound for a territory where electricity costs have historically hovered at double the U.S. national average [2]. For infrastructure investors, the Puerto Rican model serves as a live stress test for decentralized microgrids. On the neighboring island of Vieques, which suffered an 18-month power outage following Hurricane Maria, a Cornell University-led initiative is demonstrating the financial viability of localized power [6]. In late 2025, the team delivered a mobile, solar-powered battery system to a local farm, with a second unit scheduled for delivery in May 2026 [alert! ‘Delivery schedules are subject to logistical delays’] [6]. According to project leaders, this community-owned microgrid is projected to slash local electricity costs from their current high of 30 to 33 cents per kilowatt-hour down to approximately 15 cents, representing a maximum cost reduction of -54.545 percent [6]. By 2027, the project plans to integrate a green-hydrogen fuel cell system to achieve complete independence from the main grid [6].

Federal Policy Shifts and Funding Headwinds

Despite the clear economic and operational benefits of decentralized renewable energy, federal policy has recently pivoted sharply against it. The Trump administration has systematically dismantled funding mechanisms designed to bolster Puerto Rico’s solar infrastructure. In early 2026, the administration canceled approximately $300 million to $350 million in solar energy funding specifically earmarked for low-income households [1][2][4][5]. These grants were originally part of the Energy Resilience Fund, a $1 billion program established by the U.S. Congress in 2022 to provide solar and battery systems to 40,000 medically vulnerable and low-income residents [2][4]. Before the funding was terminated, only 6,000 systems had been successfully installed [2][4]. The Department of Energy has redirected a significant portion of these funds to the Puerto Rico Electric Power Authority (PREPA)—a state-owned utility with a history of executing only a fraction of its federally funded projects [2][4]. The Department justified the cuts by stating that the island’s grid “cannot afford to run on more distributed solar power,” arguing that rapid deployment has caused unacceptable grid fluctuations and instability [1][2][5].

Broader Macroeconomic Impacts

The friction between localized renewable adoption and federal policy extends beyond Puerto Rico, reflecting a broader macroeconomic tension in the U.S. energy sector. On April 1, 2026, the U.S. Department of Agriculture (USDA) abruptly halted grant applications for the Renewable Energy for America Program (REAP) to rewrite rules in compliance with a July 2025 executive order targeting “market-distorting subsidies” [7]. This freeze arrives at a precarious moment for the agricultural economy; electricity costs have risen nearly 10 percent over the past year, and diesel prices have spiked 46 percent since the onset of the war in Iran in late February 2026 [7]. Yet, market forces continue to heavily favor renewables. According to data released by the Federal Energy Regulatory Commission (FERC), solar energy accounted for more than 72 percent of all new U.S. electrical generating capacity added in 2025, with wind power contributing an additional 16 percent [8]. As Puerto Rico’s energy landscape demonstrates, the transition toward decentralized, renewable power is increasingly driven by economic necessity and climate resilience, even as it navigates complex political and regulatory headwinds [GPT].

Sources

Renewable energy Grid infrastructure