MidAmerican Solar and First Solar Inc. announced that they have installed the first solar panel on what they say is the largest solar project in the world. When completed, the 550-megawatt project will include nearly 9 million photovoltaic panels. The Topaz project will create about 400 construction jobs during its three-year construction period and will generate nearly $417 million in local economic impact, the majority of which will occur during construction; and will provide California with renewable electricity. The Topaz project will provide enough energy to power approximately 160,000 average California homes, according to a news release. Des Moines-based  MidAmerican Energy Holdings Co. is the parent of MidAmerican Solar.