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Cramer: How Tesla could 'break the power grid'

CNBC's Jim Cramer said Friday that Tesla Motors' new product could potentially spell the end of the power grid as we know it.

"There's 50 million commercial roofs in this country, and if you can get something going in every one of those roofs and then get something going in the 200 million homes, then we would wreck the power grid," Cramer said on CNBC's "Squawk on the Street."

Cramer made his remarks one day after the company launched a new line of batteries meant to power home, businesses and utilities.

Read MoreWhy this could be the top for Tesla

Nevertheless, Cramer added that he would not buy the company's stock yet, as it remains a "hope stock." "But people have hope, and I think people want to have a generator that's solar," he said. "If [the product] does amass [popularity], the stock will go higher."

Tesla's stock opened Friday's session slightly higher. Click here to see where the stock is trading now.