Payback period for residential rooftop solar in the Philippines falls to just three years as electricity prices surge

“The supply of panels is already on the ground. The economics are already there. Consumers are keen. Even back in 2024, 82% of surveyed households expressed some interest in adopting solar panels,” Jones added.

The report sets out a vision for 3,500 MW of rooftop solar paired with 4,500 megawatt-hours (MWh) of battery storage within 24 months, matching the size of the Meralco Terra Solar project. At the latest installed battery price of $125 per kilowatt-hour, the total project cost would be around $560 million. Rooftop solar with batteries would also offer a cheaper and quicker alternative to new coal plants, which BloombergNEF estimates at $87–$117/MWh against $55–$80/MWh for firmed solar.

To unlock this scale, the report recommends three policy interventions. First, expanding loan schemes like the Government Service Insurance System’s Ginhawa Solar Energy Loan (GSEL) programme, a 5% loan repayable over 5 years, to the country’s roughly 40 million private sector workers.

Second, the report suggests enabling smaller plug-and-play solar. A micro-generation exemption below 800 watts, similar to Germany’s balcony solar framework, could cut payback times to well under two years and bring solar within reach of less affluent households. Germany now has one million such systems installed, totalling 1,000 MW.

Third, a government project to build batteries at scale, ideally distributed across roughly 45 sites of 100 MWh each, with a land footprint of less than twenty 20-foot containers per site.

The report also welcomes recent policy changes that have made rooftop solar easier to deploy, including the reduction of net metering approval to 10 days and electrical permit issuance to 3 working days from early 2026, the introduction of multi-site and aggregate net metering from February 2026, and updated Retail Competition and Open Access regulations that, from June 2026, will allow customers with over 100 kilowatt demand to enter solar power purchase agreements.

“Rooftop solar has two key advantages over wind and utility solar: it is built in days, not years, and with batteries, it reinforces the grid rather than stretching it,” Jones said. “The government’s plans to speed up renewables auctions will help avoid a future energy emergency. Rooftop solar can help do that even faster.”