Tesla has ambitious plans for growth, and they won't come cheap.

The electric-car maker said this week it plans to spend $1.5 billion in 2015 to expand production capacity, launch the Model X crossover and continue work on its Gigafactory, which is being built outside of Reno, NV.

The company is also investing in its stores, service centers and charging network, which is expected to grow by more than 50 percent this year. Plus, it's still working on the Model 3, which is scheduled to arrive in 2017.

"We're going to spend staggering amounts of money on [capital expenditures]," Tesla chairman and CEO Elon Musk said on an investor call.

He then added: "For a good reason. And with a great ROI [return on investment]."

They're bold plans, and Musk is clearly willing to put Tesla's money where his mouth is.

That's why the company is projecting a whopping 70-percent increase in deliveries this year, for a total of 55,000 cars. A large chunk of that growth will come from the addition of the Model X crossover to Tesla's portfolio, and the company already has nearly 20,000 reservations for it. More than 30 Model X prototypes have been built, and it is expected to begin shipping to customers this summer. Musk said he's "highly confident" the vehicle, which has experienced delays, will arrive on time. The company also had more than 10,000 orders for the Model S at the start of the year