The National Transmission Corp. (TransCo) is taking steps to ensure that transmission lines nationwide can handle the increasing share of renewable energy (RE), a company official said Wednesday.

Renewable energy currently makes up about 25 percent of the country’s power mix, as the government targets 35 percent by 2030 and 50 percent by 2040.

Speaking on the sidelines of Energyear Philippines 2026 in Mandaluyong City, TransCo President and Chief Executive Officer Fortunato Leynes said transmission constraints remain, largely due to project delays caused by right-of-way issues and lengthy capital expenditure approvals.

Leynes said these issues and the corresponding remedies will be addressed in the Smart and Green Grid Plan, which is part of the Philippine Energy Transition Strategies under the Philippine Energy Plan 2023–2050.

He said the plan will identify the transmission facilities required to support upcoming RE projects and is expected to be completed "before the middle of the year."

Earlier, the National Grid Corp. of the Philippines (NGCP) also flagged the need to evaluate transmission capacity as renewable energy continues to expand.

While NGCP said it has contingency measures to manage capacity fluctuations, it stressed that safeguards must be in place to maintain an uninterrupted power supply.