SolarCity (NASDAQ:SCTY) has been on a tear so far this year, with shares up an astounding 377%. Between raising its guidance for 2014 and the slew of deals it has signed with prominent customers such as Wal-Mart and the U.S. military, the company seems to be making all the moves investors seek. Its most recent deal with Tesla Motors (NASDAQ:TSLA), though, was one of the biggest reasons it vaulted its way onto our list of favorite energy stocks.

What makes the deal with Tesla so special is that it helps to address one of the biggest weaknesses in solar power today: intermittency. To find out why this is such a critical hurdle for the company and why fool.com contributor Tyler Crowe picked it as his favorite stock, check out the following video..

 

Fool contributor Aimee Duffy has no position in any stocks mentioned. Fool contributor Tyler Crowe owns shares of SolarCity. You can follow them on Twitter, @TMFDuffy and @TylerCroweFool, respectively. 

The Motley Fool recommends and owns shares of SolarCity and Tesla Motors. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.