Written reply to PQ on reliability and extent of use of Pulau Ubin’s electricity microgrid

Question:

Ms Valerie Lee: To ask the Deputy Prime Minister and Minister for Trade and Industry (a) how much electricity consumed on Pulau Ubin in 2025 was generated by solar energy from the microgrid; (b) how is the grid reliability of the system; and (c) what is the financial or service compensation for residents and business owners on the island during microgrid power supply trips.

Written Answer by Deputy Prime Minister and Minister for Trade and Industry Gan Kim Yong

1.           The Pulau Ubin Micro-Grid serves more than 30 residential and business consumers with a total annual consumption of around 300 mega-watt hours, and features an experimental vanadium flow battery energy storage system. In 2025, solar energy supplied about 10% of electricity demand while diesel generation met the remaining 90% of demand. We expect solar utilisation to increase when an upgraded battery energy storage system is commissioned later this year.

2.           In 2025, there were 13 power supply trips. The micro-grid operator, EDP Renewables (EDPR), is working to upgrade the system to enhance overall system reliability.

3.           The micro-grid users affected by power supply trips may make representations to EDPR for compensation. EDPR has compensated all users who were previously affected by power supply trips.