Tesla Motors, Inc. (TSLA) CEO Elon Musk released details related to its much-anticipated, revised master plan, which expands the company's focus to becoming a one-stop shop for various green energy endeavors, as opposed to one focused just on automobiles. 

The charismatic CEO had teased investors for more than week with various posts on Twitter, promising to update his 2006 playbook, in order to better explain his $2.8 billion acquisition bid for SolarCity Corporation (SCTY), a deal Wall Street collectively hated. The new plan, which Musk described as "accelerating the advent of sustainable energy," was seen as an attempt to convince skeptics of the validity of the combined company.

In a blog post on the company's website Wednesday titled "Master Plan, Part Deux," Musk described a future where his electric car-sharing network will power self-driving heavy electric trucks and buses via solar energy. Musk promised that both a bus and a commercial truck should be ready for launch next year, though they are in early stages of development. 

The company's aggressive push towards mass-transit, autonomous vehicles is also part of Musk's vision of idle vehicles, that are fully autonomous, being sent off by their drivers to transport others, creating a more efficient use of energy. (Read More: Elon Musk: Success Story)

Tesla in recent months has had to defend its autopilot feature, which has come under regulatory scrutiny for an accident that ended in a fatality. The feature offers steering assistance and other advanced aid. However, questions regarding public safety and consumer education have dominated headlines. 

On the blog, Musk acknowledged that true autonomous driving will take more time to perfect and win regulatory approval, but he pressed forward, explaining that an urgent need for safety was why the company is going ahead with partial autonomous driving. "The most important reason is that, when used correctly, it is already significantly safer than a person driving by themselves," Musk said. 

In terms of sustainable energy, Musk believes that humanity has no choice but to move in that direction. "By definition, we must at some point achieve a sustainable energy economy or we will run out of fossil fuels to burn and civilization will collapse," Musk wrote on the blog. "Given that we must get off fossil fuels anyway and that virtually all scientists agree that dramatically increasing atmospheric and oceanic carbon levels is insane, the faster we achieve sustainability, the better." (Read More: Elon Musk: Most Influential Quotes)

For the first time, Musk also said Tesla could operate a ride-hailing network service, which would compete with existing services from Uber and Lyft. “In cities where demand exceeds the supply of customer-owned cars, Tesla will operate its own fleet, ensuring you can always hail a ride from us no matter where you are,” Musk wrote.

For all of the criticism Musk has taken for constantly over-promising and under-delivering, he has largely kept promises made when the first plan was unveiled a decade ago, including creating an electric vehicle that would be more mainstream, which the Model 3 is designed to be.

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