On Earth we use it everyday.

Lighting our homes, driving our cars, just about everything.

But what about in space?

In the future, NASA's astronauts will need energy resources in order to live and work on other planets.

In the 1990s at the University of Arizona, K.R. Sridhar and his team were working with NASA

on a technology that could use solar power to convert CO2 on Mars

into oxygen for breathing and fuel.

The relationship is that you're taking electricity typically from solar panels if you're on Mars,

and you electrolyze CO2, and what you get at the other end is oxygen and fuel.

And the fuel in this case is carbon monoxide.

Sridhar had an idea for another application of the technology for here on Earth.

By reversing the original concept,

the device had the potential to take oxygen and fuel and generate energy.

John Finn: Literally, if you just turn the wires around like this,

you can make something that behaves like a fuel cell.

Now it's not the kind of fuel cell that you can commercialize--

there's a lot of changes that you need to make--

but the physics works.

Narrator: In 2001, KR and his team moved to the NASA Research Park at Ames Research Center

to foster the development of their new fuel cell idea.

Now known as Bloom Energy, the firm is located in Sunnyvale, California

where they are producing solid oxide fuel cells based on the original NASA work.

The electrochemical device, a solid oxide fuel cell,

can produce electricity directly from oxidizing the fuel.

Although fuel cells have been around for a long time, Bloom's product is different.

Theirs are not made from precious metals or corrosive acids.

Stu Aaron: We use the phrase "powder to power" a lot.

And the reason for that is that you see here just about all the elements that go into the cell itself

start out as readily available powders from different places.

We turn those powders into inks, again using some chemicals and other materials,

And once you've got inks, we paint the on these cells

using a process that's a lot like what you would use to silkscreen t-shirts.

Narrator: Besides its materials, Bloom's fuel cell has a couple of other advantages.

They're high temperature, making them fuel flexible and very efficient.

Stu Aaron: Which means twice as much electricity for the same amount of fuel

or half as much carbon for the same amount of electricity.

Narrator: The technology is also reversible.

Stu Aaron: We can combine it with renewable, but intermittent technologies like solar and wind,

and when the sun is out or the wind is blowing,

you can take the electricity that a solar panel would produce,

run it through the system in that Mars direction, produce air, produce fuel.

Narrator: Each fuel cell generates enough energy to power an average lightbulb.

To build large servers, Bloom stacks the cells.

Stu Aaron: This stack has about 25 cells in it and this stack is half a kilowatt.

This is enough to power half of an average U.S. home,

or a whole average European home, or two average Asian homes.

Narrator: In 2008, Bloom installed its first server at Google.

Since then, Ebay and others now have servers helping to generate their power.

Stu Aaron: We can ultimately deploy these units in remote parts of Africa or Asia

and bring power where there is no power today.

Narrator: And then who knows. Maybe Mars.