Jed Dorsheimer -- Canaccord Genuity -- Analyst
Hi, thanks, and congratulations on a great year. Elon, I guess, my question is around the Megapack or your energy business. And so, as we look at the strategy or the supply chain constraints that you mentioned, you have two different strategies, or it seems like with Megapack and Powerwall, and I think the Powerwall was answered with 4680 and the 2170 opening up. So, I was wondering if you could just talk about the supply chain and LFP for the Megapack and what we should expect for that.
Elon Musk -- Chief Executive Officer and Product Architect
Yeah. To be clear, we do think that old stationary storage, Powerwall and Megapack, will be -- will transition to an iron-based system, basically a non-nickel system. Manganese is also, you know, could be part of the future, but primarily iron. It just comes out iron-nickel.
We need something that is, you know, formed in a star before a supernova, ideally. So, you know, iron is. So that's because there's a ridiculous amount of iron on earth as is a ridiculous amount of lithium. So you can really expect all stationary storage to transition to iron over time.
And like I said, with some -- manganese is like a wild card. There's also not a lot of manganese. And I should say like we did short-change the energy business last year, and that vehicle took priority over the energy side. So --
Drew Baglino -- Senior Vice President, Powertrain and Energy Engineering
Not on cells, but on chip side.
Elon Musk -- Chief Executive Officer and Product Architect
Yeah, on chip side, exactly.
Drew Baglino -- Senior Vice President, Powertrain and Energy Engineering
Yeah.
Elon Musk -- Chief Executive Officer and Product Architect
So, yeah, we -- but -- we do see a very, you know, I mean, long-term probably terawatt-hour per year energy business. So, a lot. It's very vast. Yeah.
Jed Dorsheimer -- Canaccord Genuity -- Analyst
That's helpful. Thank you. So you what -- do you see that '22 is kind of the opening of that -- the energy business reaccelerating?
Elon Musk -- Chief Executive Officer and Product Architect
It's hard to predict 2022 because we still have lingering supply chain -- there are still lingering supply chain issues globally. But I think the chip stuff -- at least the chip side of things appears to -- looks like it will alleviate end of this year or '23. I mean, there are a crazy number of chip fabs being built, which is great. The sheer number of chip fabs being built right now is exciting to see, yeah.
So there could be other issues. We're trying to anticipate those as much as possible but, you know, predicting the future is difficult.
Drew Baglino -- Senior Vice President, Powertrain and Energy Engineering
And the goal is definitely to grow it this year.
Elon Musk -- Chief Executive Officer and Product Architect
Yeah. We'll grow it this year, for sure. It's just, you know, we -- if we're simply -- we're able to respond to demand, it might grow by like 200% or 300% or something, you know, as opposed to sort of 50% or something.
Zach Kirkhorn -- Chief Financial Officer
Yeah. I mean, I think it's exactly that. I mean, it's a question of does it double, triple, quadruple? I mean, either way, I think, you know, our plans are pretty ambitious for Megapack this year and storage in general.
Elon Musk -- Chief Executive Officer and Product Architect
Yeah.
Zach Kirkhorn -- Chief Financial Officer
The exact amount of growth is hard to know. But ultimately -- I mean, to Elon's point about the growth of this business, I mean, we need to be growing it faster than the vehicle business.
Elon Musk -- Chief Executive Officer and Product Architect
And it will naturally grow faster than the vehicle business once we can less shipthe --
Zach Kirkhorn -- Chief Financial Officer
Yeah.
Elon Musk -- Chief Executive Officer and Product Architect
The damn chip constraint, frankly. So it will grow like kelp on steroids, basically, on their own. It needs to. And our primary mission is to accelerate sustainable energy.
That's always been our primary mission, and we're trying to stay true to that.