The Guam Power Authority (GPA) is informing its valued customers that a partial implementation of the 1-hour rotating outage schedule may be implemented around 5:00 pm, Wednesday, March 12, 2025, due to limited generation capacity.

GPA reassures its customers that plant personnel are working around the clock to get generator units back online and increase system capacity. The current situation is expected to be short term as we get units repaired and returned to service as soon as possible.

Baseload unit Piti#8 is still operating at a limited capacity of 22 MW due to high liner temperature issues. Once repairs are complete, the unit is expected to return to service on or before Thursday, March 20, 2025. Outage for repair of the unit is pending the return of Cabras 2.

Baseload unit Piti#9 is currently operating at a limited capacity of 30 MW as of today due to high liner temperature issues.

Baseload unit Cabras#2 repairs on the boiler tube are underway. The unit was taken down last week, with plant personnel anticipating its return to service on or before Sunday, March 16, 2025.

Piti 7 CT is still undergoing repairs to address start-up issues which occurred last Sunday.

GPA’s recent progress to address Guam’s power capacity shortfall has reduced the frequency and scale of load shedding events in the last few months. However, when two or more baseload units are offline for emergency repairs or limited in capacity production, it puts the power system in a precarious situation, leaving it vulnerable to some capacity shortages until we bridge the gap to the new Ukudu Power Plant scheduled for commissioning by September 2025.

To increase capacity and assist with generation shortfall, GPA is working with its Battery Operators to shift up to 16 MWh of Battery Energy Storage System (BESS). GPA is also requesting assistance from our U.S. Navy partners to help with additional capacity during peak hours. Guam Ukudu Power (GUP), GPA’s partner for the Ukudu Power Plant provides limited support during peak hours when testing.

GPA continues to encourage its customers to conserve power from 5:00 pm to 11:00 pm, and implement conservation measures such as turning off water heaters and limiting full usage of air conditioning at their homes and offices. Enacting conservation plans reduces the demand for energy and can mitigate the need for outages.