Tesla runs an entire island on solar power
The part I don't get is: why use batteries for large infrastructural power storage? Why not flywheels?<p>edit: looks like Oʻahu is getting flywheels: <a href="http://amberkinetics.com/amber-kinetics-and-hawaiian-electric-sign-agreement-for-flywheel-energy-storage-pilot-project/" rel="nofollow">http://amberkinetics.com/amber-kinetics-and-hawaiian-electri...</a><p>It's too bad Tesla seems all-in on batteries even for large-scale storage projects.