Water heaters are also being recruited to serve as repositories for renewable energy because unlike other appliances, water heaters also store energy in the form of hot water. So power created by renewable means such as wind could be stored by water heaters modified to run hotter than the standard 120oF and fitted with controls to mix in cold water so residents weren’t burned by the ultra hot water being stored.
Duke Energy CTO David Mohler says the utility is considering using hot water heaters, among other solutions, to balance out power fluctuations produced from solar panels. “What I could do is come up with an algorithm to vary the power draw on the heating element on the hot water heater and use that to balance the fluctuation of the solar panel output,” he said. “We’re still grappling with how to orchestrate that.”
As more utilities deploy smart meters as part of long-range energy models, some officials are expressing concern whether the projected rate reductions will benefit the poorest citizens. Maria Wardrobe, director of communications at the UK’s National Energy Action, suggested that “vulnerable and fuel-poor people” may suffer since they are already extremely frugal in energy use because they can’t afford to properly heat their homes. “NEA is concerned that additional information provided by smart metering will simply emphasise the unaffordable cost of fuel,” wardrobe said, adding that it could “lead to more vulnerable households turning their heating down or even off during spells of cold weather.”