DTE will offer two rates, a low, off-peak rate to charge plug-in vehicles overnight or a monthly flat rate of $40 per vehicle (how will they identify a single vehicle, though?). Also, DTE will pay up to $2,500 for customers to get a “separately metered circuit with a charging station” installed or just pay for a station’s installation. MPSC approved the rate to let DTE see how plug-in vehicles will impact its grid. The experimental rate goes through the end of 2012 and will be available to the first 2,500 customers who sign up. Read more at green.autoblog.com