Spin , which has collaborated with Sacramento State University engineering students on multiple flywheel design projects , is still in its premarket prototype stage , but it ’ s getting close to releasing a product , which will look something like this : a 1-cubic-meter box weighing about 1,000 pounds containing a spinning hub that holds up to 30 kilowatt hours of electricity . Cattaneo says it probably won ’ t be much , if any cheaper , than conventional storage systems but will last much longer . “ We ’ re going to sell you something that lasts 25 years at full capacity for the same price as a conventional battery that lasts 10 years and will only be at 70 percent of capacity by the end ,” Cattaneo says .
Alastair Bland is a freelance journalist whose work also appears in NPR ’ s food blog The Salt , Smithsonian . com and Yale Environment 360 .
Spin Storage Systems is developing a prototype for an advanced and low-cost flywheel battery in its tech lab in northwest Sacramento . 3D DRAWING COURTESY OF SPIN STORAGE SYSTEMS
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