I reviewed the historical data for my water heater as it is my #2 winter energy draw. I found on the power meter many reheats of the tank during the hours when no one is awake or using hot water. Further investigation showed my hot water recirculating pump ran intermittently at all hours – triggering frequent middle of the night reheats on the water heater. Simply setting the water circulating pump not to operate during times when we are asleep stopped the excessive middle of the night reheats. I now start the circulating pump one hour before we normally arise to ensure hot showers.