GILMAN, Wis. – Electricity purveyor Xcel plans to build a a 500-acre solar farm near this Pierce County village 50 miles northeast of Eau Claire. The company said the array will be the largest solar facility in western Wisconsin and produce 74 megawatts. Solar panels will pivot to follow the sun. The array will move Xcel closer to delivering carbon-free electricity to all customers by 2050, the company said. What’s in it for Gilman? Mike Herro, an Xcel spokesperson, said there will be $300,000 a year in shared revenue for Gilman, population 760, and the county