But all of those, even hydrogen, are simply ways to store energy.

At the atomic level, all those things are moving, so they can store energy.

Until then, the plants will continue to store energy in their roots.

It can only store energy in a very restricted form.

The light can store energy in batteries for up to three days without sun or wind.

Give me a few days' sunshine and I have energy stored against a month or more.

They are produced by the bacteria to store carbon and energy.

Finally, it had enough stored energy to produce a flower.

So it is a simple mechanical means of storing energy.

The name underscores the fact that the vehicle can store and use energy taken from the sun.