How This Heat Pump Water Heater is Also a Battery. Go to https://ground.news/undecided for an innovative way to stay fully informed on tech, energy, the climate and more. Save 40% on the Ground News unlimited access Vantage plan with my link. Heat pump water heaters have been around for over a decade. If you follow this channel, you probably know they're three to five times more efficient than a standard electric tank. Maybe you've got one. I do. But here's what most people don't realize. Even if you own a heat pump water heater, it's still pretty dumb. It heats reactively. The tank drops below the setpoint, the compressor kicks on. It doesn't know your schedule. It doesn't know your electricity rates. And it definitely doesn't know when your solar panels are cranking. Two Boston startups think that's a massive missed opportunity. They're treating the water heater as a thermal battery, a cheap, insulated vessel that can store energy as heat, shift electricity use to cheaper hours, and participate in grid services. One of them, Wilmington, Massachusetts-based Cala Systems, invited me to tour their factory. Their predictive software is licensed from the National Renewable Energy Lab. According to a California Energy Commission study, intelligent scheduling on time-of-use rate plans alone can cut costs by 15 to 19 percent beyond what a standard heat pump water heater already saves. So I went inside to find out: is a smart water heater actually worth the premium? Or is "intelligent" just a buzzword bumper sticker slapped on a tank of hot water?

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Chapters

00:00 - Intro

02:10 - The Intelligence

05:21 - The Thermal Battery Concept

08:57 - The Tour

15:37 - The Real Economics