Guam energy mix & electricity

Power plants in Guam produced 1.9 TWh of electricity in 2024. That puts it in the same league as Malawi. Oil provides 91.4% of it. Few countries depend so heavily on a single source.

Renewables supplied 8.6% of the electricity, which ranks Guam 133rd of 158 countries (in the bottom quarter). That is 25 points below the world average of 33.8%. It is also below the average for Oceania (41.4%). The carbon intensity of electricity is 608 g CO₂e/kWh; the global average is 458 g/kWh. This is one of the more carbon-intensive grids in the world. In the cleanest-grid ranking, Guam is 127th of 158.

Over the past decade solar power added more generation than any other source (+160 GWh since 2014, plus 8.6 percentage points of share). The net effect: renewables gained 8.6 percentage points of share since 2014. Total generation grew by 160 GWh over the same period. Carbon intensity dropped from 659 to 608 g/kWh, a 8% cut.

Coal has essentially never been burned for electricity here: its share has stayed below 1% throughout the record.

Solar (8.6%) and wind (0%) now add up to 8.6% of generation; the global figure is 17.3%. Per person, that is 954 kWh of solar electricity a year, 2.8× the global average. In solar electricity per person, Guam ranks 14th in the world. Solar first passed 1% of the mix in 2015.

Generation per person is 11,085 kWh a year, 2.9× the world average of 3,860 kWh. Guam does not trade electricity with other countries: the grid is not interconnected with any neighbour.