30. 政府问责局还报告称，关岛电力管理局向岛上公众和国防部提供所有电力，后者是电力管理局的最大客户，占 2012 年收入的 22%。关岛电力系统存在可靠性问题，曾导致停电事故，而且该电力系统依赖接近预期寿命的老旧发电机。这一状况令人想起内政部监察主任 2012 年的报告，报告指出关岛容易发生停电，而且注意到电力管理局发电机组约四分之一是在 1976 年以前安装的。结论是，如果该管理局立即整体更换其老化的基础设施，将需要大量金融投资。2015 年10 月，关岛第一个太阳能发电设施完成并已接入现有电网，使大约 10%的电网电力来自可再生能源。
30. The Government Accountability Office also reported that the Guam Power Authority provided all the electricity on the island for both the public and the Department of Defense. The Department is the Authority’s largest customer, accounting for 22 per cent of revenue in 2012. The electric power system of Guam has experienced reliability problems that have resulted in power outages and is dependent on ageing generators approaching the end of their life expectancy. This situation recalled a report of the Inspector General of the Department of the Interior in 2012, in which it was stated that Guam was susceptible to powerblackouts and noted that about a quarter of the generation units of the Authority had been installed before 1976. The conclusion was reached that, should the Authority have to replace its entire ageing infrastructure at once, it would require a large financial investment. In October 2015, the first solar power facility on Guam was completed and integrated into the existing grid, providing around 10 per cent of the grid with renewable energy.