Wisconsin regulators have approved the second piece of Alliant Energy’s plans to spend more than $1.5 billion to replace its coal-fired plants with solar energy.The Public Service Commission voted unanimously Thursday to authorize Alliant to buy or build six solar farms at a cost of about $620 million.The projects in Dodge, Grant, Green, Rock and Waushara counties will have a combined capacity of 414 megawatts, enough to power about 100,000 typical homes.The vote comes about a year after the PSC approved a roughly $925 million investment in 675 megawatts of solar spread over six projects currently under development.Together the projects are part of Allliant’s plans to replace its remaining Wisconsin coal plants in the next two years, which the utility estimates will save consumers $1.52 billion to $6.15 billion over the next 35 years.
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