Clever - stored energy on a rail

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" rail cars carrying heavy blocks of concrete that are pushed to the top of a grade using excess power from renewable energy plants during off-peak hours when electricity demand is low. When the grid requires energy to meet periods of high demand, the rail cars are released back down the hill, generating electricity through regenerative braking. The company says the system can respond to increases or decreases in demand in a matter of seconds, boasting a charge/discharge efficiency of 80 percent, and can deliver constant power for periods of up to eight hours."

Now that's thinking outside the box. NOTE- the wind generators in the background


http://www.amusingplanet.com/2015/03/gravity-train-as-energy-storage.html?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+amusingplanet+%28Amusing+Planet%29