Saudi Electricity Co (SEC), the Gulf's largest utility firm, has reported its net loss for the first quarter more than doubled. It lost 1.94 billion riyals ($517.4 million) during the three months to March 31, compared to a loss of 913 million riyals during the corresponding period of 2014. The utility cited the costs of implementing an order from the electricity regulator on power usage by top manufacturers, as well as other expenses, for the decline in earnings. It did not elaborate. During the first quarter, the firm paid 545 million riyals to employees in bonuses as part of a scheme to celebrate the Saudi royal succession. Besides, SEC's results are highly seasonal because of the big swing between power demand in winter and in summer.