A new set of Virginia laws could bring community solar to a much larger group of residents and reduce electricity costs for roughly 125,000 additional households. It has also made one farmer's choice to devote 20 acres to a modest solar project look especially significant. What's happening? What began as a letter asking to lease part of Steve Ault's 100-acre family farm in Prince Edward County, Virginia, ended with Steve and his wife, Chris Ault…