Tesla’s Megapack battery is big enough to help grids handle peak demand

Tesla announced a new massive battery today called Megapack that could replace so-called “peaker” power plants, which provide energy when a local electrical grid gets overloaded. Tesla says that Pacific Gas and Electric (PG&E) will deploy several Megapacks at Moss Landing on Monterrey Bay in California, which is one of four locations where the California utility plans to install more cost-effective energy storage solutions. Each Megapack can store up to 3 megawatt hours (MWh) of energy at a time, and it’s possible to string enough Megapacks together to create a battery with more than 1 GWh of energy storage, Tesla says. The company says this would be enough energy to power “every home in San

How much would 100 percent renewable energy really cost?

Democratic presidential candidates talked hardly at all in the debates late last month about the Green New Deal, a proposal in Congress, to, among other things convert America's electric power completely to renewable sources. Americans have shown broad support for such a transition. What's been left unaddressed—and which many candidates weren't prepared to discuss—is the cost. Estimates vary by trillions of dollars, but now a respected consulting firm—one that has consulted with the oil industry for decades, yet predicts a rapid rise for electric cars—has compiled an estimate of the cost of converting to 100 percent renewable power in the U.S.: $4.5 trillion, or about a quarter of U.S. GDP f

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