Two utilities have released the results of their smart grid trial projects, with both reporting significant savings in their opex and a strong incentive to their bottom lines should they rollout the technology to the rest of their customers. National Grid, a utility operating mainly in the North Eastern US, implemented its two-year Smart Energy Solutions program a little over a year ago, and has announced that in the first year it achieved a 98% customer retention rate, a 72% customer satisfaction rating, and total customer bill savings of around $1.25m – equating to around $113 per customer in a year. Down in Florida, FPL (Florida Power and Light) has announced that its 4.8m-unit smart meter deployment has saved it…