GPA Producing Less Than Half the Power It Should Be Putting Out


GPA’s backup units are also in disarray.

Guam –  Tentative load shedding schedules have been issued every day this week since Monday and they will continue into the weekend.


TEMES unit no. 7 is still down. CCU Chairman Joey Duenas told PNC yesterday that he does not know when it will be back up. Meanwhile, GPA issued another round of tentative load shedding today that’s expected to run through the weekend. But what is state of Guam’s fuel based generators? Let’s take a look….


Currently, 50 percent of Guam’s six main or base load generators are either broken or unavailable. This includes the recently fire damaged Cabras 3 and 4 and Cabras 2, which is down for maintenance. When all six generators are working, GPA has 298 mw. However, currently the only base load generators that work are Cabras 1, MEC 8 and MEC 9. This means the heart of GPA’s generation is only putting out 124 mw–174 short of full capacity.


GPA’s backup units are also in disarray. TEMES, both Dededo CT’s and the Yigo CT are currently under repair or need repairs. This shorts GPA 101 MW from their five main backup generators. These backup generators are crucial because they pick up the slack when base load generators are down.


However GPA still has some working backup generators. GPA’s diesel units, which include the newly acquired Agrekko units in Yigo provide GPA with 71MW, Still 9 megawatts short of its expected performance.


All in all GPA should have 498 megawatts when everything is working. Today GPA only produces 214 megawatts, which is 284 short of what it should be producing. GPA is producing less than 50 percent of the power it should be.


At a time when each megawatt is valuable, how does solar fit into the picture? Currently, GPA has maintained that solar energy cannot help during peak hours because from 6-9 p.m., the sun is not up.


Earlier this week, residents did experience load shedding during the day due to issues with MEC 8 and 9, which tripped offline at 10 a.m. and 12 p.m. respectively. When GPA issues load shedding schedules they typically start at 2 pm, sometimes earlier. NRG, the operators of solar energy at Dan Dan can contribute 25 megawatts, similar to what the long delayed phase ii could contribute as well.


As of now there is definitive timeline as to when GPA’s system will be back to full capacity. The overhaul on Cabras 2 is expected to be done on Monday, only to have Cabras 1 go down for a new transformer shortly thereafter. PNC also spoke with Rino Manzano, General Manager of the MEC units and he says both MEC 8 and 9 are “in serious need of a major overhaul as well.” but they can’t be overhauled until there is enough base load generation.


Although there are tentative load shedding schedules it should be noted that they have managed to keep the power on during most of the scheduled load shedding times.


  1. I feel the story is misleading in that the writer failed to mention what is a maximum amount of megawatts consumed at peak hours. That’s important. If for example, 270 megawatts is the maximum amount consumed at peak hours, then that’s 270 minus 214 which equals 56 megawatts short. There’s a big difference between being short 284 and 56 megawatts. With Cabras 2 coming back online by today, that number will be reduced even more.

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