Tesla Inc said on Monday that Chinese tech giant Tencent Holdings Ltd has invested $1.78 billion in the Electric carmaker for a 5 percent passive stake. Tencent, best known for its WeChat mobile app, has been investing in a number of sectors, including gaming, entertainment, cloud computing and online financing. Tencent now owns more than 8 million shares in the company as of March 24, Tesla said in a regulatory filing.