Last Thursday night, Tesla Motors (NASDAQ:TSLA) announced the details of its new line of residential and business-scale rechargeable batteries under the banner Tesla Energy, marking a massive shift for the company. True to form, Tesla CEO Elon Musk has set a lofty goal with regards to the batteries. He shared his hopes that Tesla's line and others like it will help the world shift away from fossil fuels by facilitating the storage of energy generated from sources like wind and solar. However, there wasn't much talk about supply-chain specifics — i.e., how much lithium, graphite and cobalt will be needed for all those batteries. With that in mind, Resource Investing News got in touch with Simon Moores of Benchmark Mineral Intelligence to talk about how Tesla's new batteries may affect the markets for those metals. A nice surprise For Moores, the biggest surprise from Thursday night's announcement was the cost of the batteries. He noted that the cost of Tesla's home-use battery, the Powerwall, was expected to come in at over $10,000. That's well above the actual cost of the battery, which is set at $3,000 for the 7kWh model and $3,500 for the 10kWh model. In the same vein, Moores said that the second thing that stood out was the scalability of the battery systems. "That was really clever from Tesla ... they're making it really easy," he said. Of course, the $3,500 price tag will still be a price barrier for many, a point conceded by Peter Rive, CTO of SolarCity (NASDAQ:SCTY). "I don't believe this product in its first incarnation will be interesting to the average person," he told the Associated Press.