The Philippines, alongside Indonesia and Vietnam, has launched a pioneering regional partnership to convert remote island communities from expensive, fossil-fueled diesel generators to sustainable solar photovoltaic and battery energy storage systems. This collaborative effort, unveiled this week at the 31st United Nations Climate Change Conference (COP31) in Antalya, Turkey, directly addresses a critical energy vulnerability in Southeast Asia: an astonishing 421 out of 447 off-grid power plants in the Philippines alone, representing approximately 94 percent, still relied on oil as their primary fuel source as of December 2025.
Spearheaded by member organizations of the Asian Photovoltaic Industry Association (APVIA), the partnership seeks to attract private capital, facilitate cross-border cooperation, and expand the market for renewable energy technologies across the region. The impetus for this transition is starkly clear. “Island communities should not have to depend indefinitely on expensive and volatile diesel generation to secure reliable electricity,” stated Tetchi Capellan, steering committee chairperson of the Asian Photovoltaic Industry Association. Capellan emphasized that “Solar and battery storage offer a practical pathway to reduce costs, strengthen energy independence, and build resilience.”
A potent case study from Cobrador Island, north of Romblon in the Philippines, illustrates this potential. There, a 30-kilowatt solar-plus-battery hybrid system successfully halved generation costs, reducing them from $0.47 to $0.24 per kilowatt-hour. This also extended electricity service from eight hours to round-the-clock availability.
Research by the Institute for Essential Services Reform estimates that solar PV paired with battery storage can deliver electricity at approximately one-third of the cost of diesel generation under comparable conditions. On a national scale, replacing diesel consumption for electricity generation could yield savings of up to 17.2 trillion rupiah. More specifically, on Sumbawa, an island east of Lombok, forecasts indicate a potential cut in generation costs by 21.3 percent and a reduction in emissions by 73 percent by 2035.
The Philippine government has explicitly signaled its robust commitment to this transformative agenda. Energy Undersecretary Felix William B. Fuentebella, who led the Philippine energy delegation at COP31, said the Department of Energy aims to integrate island electrification directly into the country's green energy auction program.
The newly formed regional alliance extends beyond merely launching individual pilot projects, championing a more holistic and long-term approach to energy transformation. The initiative stresses the critical need for coordinated energy planning, buttressed by appropriate policies, innovative financing mechanisms, grid modernization, and enhanced technical capacity across the participating nations.
A preliminary energy transition roadmap developed by the Greening the Islands Foundation offers an optimistic outlook for the region, projecting that renewable energy could supply between 83 percent and 100 percent of electricity generation on these islands by 2035. Such a widespread transition could lead to annual diesel savings of up to $34 million, freeing up significant resources that can be redirected towards community development and other vital services.