The video is full of little gems of ingenuity, but those of you who don't mind being spoiled can keep reading and discover the surprise winner for yourself.
The EnerJar, an almost-steampunk DIY energy meter in a Ball Jar took home the award in a come-from-behind victory that no one was expecting. In fact, the EnerJar wasn't even selected by the panel to be in the top four.
That honor went to a gravity powered light, a crank-powered light, a rolling battery charger, and a unique system for modular cellphone batteries. The EnerJar was a last-minute addition to the finalists, and the crowd voted it to the top with a so-loud-I-had-to-take-my-headphones-off cheer.
This focus on energy use visualization is something that I like. Just like how the Prius helps drivers be more efficient by giving them a constant running total of their gas mileage, a home-energy monitor could result in a lot of electricity, carbon and money savings. Of course, for those of us who want the same thing, but in a not-so-awesome package, home energy monitors have been available for quite some time.
I personally love my kill-a-watt, and have it keeping running tabs on my computer usage as I write. Apparently the plans for the EnerJar are somewhere online, but I haven't been able to locate them yet. I'll let you know as soon as I do.
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